TW201005175A - Engine, partition member, and production method of the partition member - Google Patents

Abstract

It aims to provide an engine capable of improving fuel atomization efficiency. An engine 120 according to the present invention is equipped with a cylinder block 122, a cylinder head 121 in which an intake port 131 for introducing air into a combustion chamber C via an intake valve opening 128 is formed, a fuel injector 170 having an injection port 171 for injecting fuel toward the intake valve opening 128, a chamber 174 in which the injection port 171 is located, a bypass passage 180 communicated with a throttle body 160 and a chamber 174, a adapter 10 having a cylindrical wall portion 11 extended in an injection direction (forward in the axis line S1 direction) of the fuel injector 170 to partition the chamber 174 radially while surrounding the injection port 171, a communication hole 15 being formed in the cylindrical wall portion 11 at the vicinity of the fuel injection port 171, and first and second sealing portions 31 and 32 for sealing between a wall surface 137a forming the chamber 174 and an outer surface of the adapter 10 at positions located rearward and frontward of the communication hole 15 in the axis line S1 direction.

Description

201005175 VI. Description of the invention: [Technical field of the invention] Separator of the engine The present invention relates to an engine and an engine for use in a prior art, a middle-aged sister 4 u ',,,,, 'The injector configuration is close to an intake valve

The opening and the auxiliary air supply port face the vicinity of one of the fuel injectors. As a document revealing such a technique, it is known that the following patent document discloses that in the engine, the fuel injector is attached to a cylinder via an adapter, and the throttle body is provided in the middle of an intake pipe. And the two throttle valves are respectively installed in the throttle body in a can open and closable manner by a Japanese; J; - the end side of the bypass pipe opened between the two throttle valves is connected to the throttle valve, and the other end of the bypass pipe is open to a tip formed at the adapter. [5 knives outside the peripheral side of the flow room. Auxiliary air introduced into the inflow chamber is blown toward the vicinity of the injection port of the fuel injector via a communication hole opening at the tip end portion of the adapter. [Prior Art Document] [Patent Document] [Patent Document 1] International Publication No. WO2005/098231A1 [Summary of the Invention] [Problems to be Solved by the Invention] At the same time, from the viewpoint of environmental protection, people have been searching for improved fuel mist. Efficiency to reduce engine fuel consumption. In this regard, in the prior art, 'people have not eagerly considered the details of the adapter and its surroundings that affect the efficiency of fuel atomization. 14030I.doc 201005175 The present invention is based on the aforementioned environment* engine for good fuel atomization efficiency. 1曰 梃 梃 梃 能够 能够 [ [ [ [ 梃 梃 梃 梃 梃 梃 梃 作为 作为 Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ Λ The following structure: - cylinder block, = : = ί 纳: piston one, which is associated with the car '", burned to, the fly-cylinder cap has at least one 4 of a main passage for passing-intake _ mouth will be in the air into the (four) burning chamber; spray n, which is mounted on the lid and has the injection port of the fuel = inlet valve injection; - chamber, the injection π is located in its 'bypass channel 'the end portion communicates with the intermediate portion of the main passage and the end portion is connected to the 'dividing member' having a partition member extending along the fuel injection direction to radially partition the chamber while surrounding the injection port a cylindrical wall portion, a communication hole formed in the cylindrical wall portion in the vicinity of the fuel injection port; and first and second sealing portions # and the like for locating the communication hole in the nozzle direction The front position is sealed between the wall surface forming the chamber and the outer surface of one of the partition members [Effect of the Invention] Therefore, the engine of the present invention can improve fuel atomization efficiency. [Embodiment] Hereinafter, embodiments 丨, 2, and 3 of the present invention will be explained with reference to Figs. 1 to u. In Embodiments 1, 2 And 3 as an example of an engine of the present invention, an engine mounted on a motorcycle will be exemplified. Descriptions of "front", "back", "left" and "right" used in the following description. It is based on the direction of the rider who sits on one of the motorcycles of 140301 Joe -6 - 201005175. <Embodiment 1> Fig. 1 shows an entire motorcycle 100 to which an engine 12 according to Embodiment i is applied. First, the entire structure of the motorcycle 100 will be explained, and then the engine 120 of Embodiment 1 will be described in detail. 1. The entire structure of the motorcycle As shown in Fig. 1, the motorcycle 1 is equipped with a bottom-bottom vehicle undercarriage (hereinafter simply referred to as "undercarriage") 110. The undercarriage 11 is composed of the following: _ a head tube 111, a spine portion 112, and a seat guide in, which are pressed from the front side (the right side in FIG. 1) toward the rear side (the left side of the figure). Sequence Configuration 'A steering shaft 103 is attached to the head pipe u in a left-right rotation manner. A hand 103a is coupled to the upper end of the steering shaft 103. It is rotatably supported - before the front wheel 1〇1 is further connected to the steering shaft 1〇3. The front panel 1 has a fender 106 having a shape covering a range from a portion above the front wheel 1〇1 to a rear portion thereof. The spine portion 112 is disposed on the axis of the motorcycle 100, that is, disposed on a center line extending in the front-rear direction. The front end side of the spine portion 112 is fastened to the head pipe 111, and its rear side is inclined downwardly and rearwardly. An air cleaner 140, an intake pipe 141, and an engine 12 () are fastened to the lower portion of the spine portion U2 in a suspension manner. Therefore, the engine 12. Big money is located at the center of the wheelbase of the motorcycle 100. The seat rail 113 is also disposed on the axis of the motorcycle 100, that is, on the center line extending in the front-rear direction. The front end side of the seat rail 113 is connected to the rear end portion of the spine portion, and the rear end side thereof is obliquely extended rearward, 140301.doc 201005175. A seat 114 is disposed above the seat rail 113. At the front end side of the seat rail 113, a downwardly extending rear arm bracket (not illustrated) is provided. A front end side of the wall 1〇5 for rotatably supporting a rear wheel 104 is swingably supported by the rear arm bracket. A suspension portion 丨i 8 is provided between the rear end side of the seat rail 1丨3 and the rear end side of the rear arm 105 to absorb the vibration transmitted from the rear arm 105 to the undercarriage 11〇. The undercarriage 110 has a body cover 115 having a shape completely covering the undercarriage 11 from above, and a front cover having a shape of a right side and a left side of the air filter 140 and the engine 120 before the head pipe 1 is covered. 115a. 2. Engine Structure In Embodiment 1, a four-integrated single steam engine is illustrated and explained for simplicity of explanation. However, the engine of the present invention is not limited to this structure. Furthermore, the present invention is applicable to both air-cooled engines and water-cooled engines, and thus the following description will be made without limiting the cooling type to any one of them. As shown in Fig. 1, the engine 120 has a cylinder block 122, a cylinder head 121 that is fastened to the front side of the cylinder block 122, and a crankcase 123 that is fastened to the rear end side of the cylinder block i22. As shown in Fig. 2, the cylinder block 122 has a cylinder bore 122a formed therein. The cylinder axis a, which is a central axis of the cylinder bore 122a, is set to be substantially horizontal in the front-rear direction. In the cylinder bore 122a, a piston 124 is slidably inserted. The type of cooling of the engine 120 can be either an air-cooled type or a water-cooled type. In the case where the cooling type of the engine 120 is an air-cooled type, a plurality of fins (not illustrated) that protrude outward from the outer peripheral surface of the cylinder block 122 are provided to the cylinder block 122. On the other hand, in the case where the type of cooling of the engine is a water-cooling type, a water jacket (not illustrated) that is formed to surround the cylinder bore 22a and configured to cause cooling water to circulate therein is supplied to the cylinder. Body 122. The engine 120 is configured to be cooled by the fins or the water jacket to prevent excessive temperature rise. The crankcase 123 (see Fig. 1) is mounted on a structurally known crankshaft (not illustrated) and a transmission (not illustrated). As shown in Fig. 2, the piston 124 is coupled to the crankshaft by a link 125 (not illustrated to reciprocate movement of the piston 124 in the steam rainbow rainbow 122a to cause the crankshaft to move via rotation of the link 125. Then, the driving force is thereby A transmission or a chain (not shown) is transmitted to the rear wheel 104 to rotate the rear wheel 104. In a state in which the combustion concave portion 121b formed at the side of the rear surface 121a closes the cylinder bore 122a, the cylinder head 121 is tight It is fixed to the front side of the cylinder block 122. The combustion concave portion 121b, the cylinder bore 122a and the piston 124 form a combustion chamber C. The cylinder head 121 has an air inlet which is connected to a combustion chamber C via an intake valve opening 128. 131 and an exhaust port 129 communicating with the combustion chamber C via the exhaust valve opening 127. A cylinder head cover I21d is attached to the front surface of the cylinder head 121. • Between the front surface formed on the cylinder head 121 and the cylinder head cover 121d In the space „, an exhaust rocker arm 134, an intake rocker arm 135, a cam 133a, and the like are disposed. The air inlet 131 is formed in a shape that is bent upward from the combustion concave portion 12lb in the cylinder head 121, or One from the intake valve opening 128 A shape that is generally perpendicular to the direction of the cylinder axis A (substantially perpendicular) and extends upwardly to the shape of the top surface of the cylinder 140301.doc -9-201005175 cover 121. The air inlet 131 is configured to be advanced via the intake valve opening 128 The gas is introduced into a portion of the main passage of the combustion chamber C. The intake port 131 has an external connection opening 131a that opens at the upper surface of the cylinder head 121. A cylindrical section that forms part of the main passage together with the intake port 131 The flow body 160 is connected to the external connection opening 13 1 a. In the throttle body 160, a first throttle valve 161 located at a side close to the air inlet 13 1 and a side located away from the air inlet 131 are provided. The second throttle valve 162. One of the bypass passages 180 mentioned below has an upstream end opening 180b and an air inlet between the first and second throttle valves 161 and 162. The inner wall surfaces of the 131 are in communication. The first and second throttle valves 161 and 162 are swingably supported by the respective rocker shafts 161a and 162a. Although will be described in detail later, the first and second throttle valves 161 and 162 by operating according to the rider's throttling The swinging manner moves the corresponding rocker shafts 161a and 162a back and forth to change the opening degree. Therefore, the flow rate of the intake air flowing from the throttle body 160 to the intake port 131 is adjusted and the opening is intended to be from the upstream end 180b. The ground 18〇a) the flow rate of the auxiliary air introduced into the chamber 174 via the bypass passage 18. As shown in Fig. 1, the intake pipe 141 constituting the rest of the main passage is connected to the upper portion of the throttle body 160. The intake pipe 141 extends obliquely forward and upward along the lower surface of the spine portion ι 2 and is connected to the air cleaner 14A. As shown in Fig. 2, above the cylinder axis A of the cylinder head 121, there is an intake valve 132. The intake valve 132 has: a valve head ma for opening and closing the intake (four) port 128; a valve stem (10) for guiding the valve head in 14030l.doc -10- 201005175 to implement a vertical The direction of the intake valve opening 128 is advanced and retracted; and a valve spring 132d' is used to urge the valve head 132a in a direction to close the intake valve opening 128. The valve stem 132b is inclined obliquely upward at a predetermined angle with respect to the cylinder axis A. On the other hand, the exhaust port 129 extends obliquely downward from the exhaust valve opening 127 to the bottom surface of the cylinder head 121. The combustion gas in the combustion chamber C is introduced from the exhaust valve opening 127 to the bottom side of the cylinder head 121 via the exhaust port 129 and then via an exhaust pipe (not illustrated) and a muffler (for example) Unillustrated) discharged outward. Below the cylinder axis a of the cylinder head 121, there is an exhaust valve 13. The exhaust valve 130 has a head 13a for opening and closing the exhaust valve opening 127, and a valve stem 130b for The valve head 130a is guided to move forward and backward in a direction perpendicular to the exhaust valve opening 127; and a valve spring 130d is used to urge the valve head 130a in a direction to close the exhaust valve opening 127. The valve stem l30b is inclined obliquely downward at a predetermined angle with respect to the cylinder axis a. In this embodiment, when the engine 12 is viewed from the side, the intake air and exhaust valve 130 is disposed at the intake valve 132 at a substantially line symmetrical position with the steam red axis a as the symmetry axis. A cam shaft 133 is rotatably provided between the wide elastic cyanine 132d and the exhaust chamber (four) between the springs 130d, which is generally used for the intake and exhaust valves and has a cam 133a. An intake rocker arm 135 is disposed between the cam shaft 133 and the intake air valve 132. The intake rocker arm 135 is rotatably supported by the intake rocker shaft 135a to the steam i cover 121 at a substantially central position thereof. An exhaust rocker arm 134 is disposed between the camshaft 133 and the exhaust valve 13 140 140301.doc -11- 201005175. The exhaust rocker arm 134 is rotatably supported to the cylinder head 12i by the intake rocker shaft 134a at its substantially central position. One end portion of each of the intake rocker arm 135 and the exhaust rocker arm 134 is in contact with the cam 133a. The rotational movement of the cam shaft U3 synchronized with the crankshaft causes the other end portions of the intake rocker arm 135 and the exhaust rocker arm 134 to push down the corresponding valve stems 130b and 132b at respective predetermined timings, thereby overcoming the corresponding valve springs 13 (1 and 132). (1) The driving force moves the valve heads 13〇3 and 132&. Therefore, the intake valve 132 and the exhaust valve 130 open and close the intake valve opening 128 and the exhaust valve opening in synchronization with the reciprocating movement of the piston 124 at a predetermined timing. 127. 3. Detailed description of the fuel injector

As shown in an enlarged manner in FIGS. 3 and 4, an intake portion 137 having an opening at the outer surface of the cylinder head 121 is formed between the intake port 131 and the intake valve 132 in the cylinder head 121. One end and the other end open at the inner wall surface of the air inlet ΐ3ι. The containing portion 137 is formed in a multi-stepped substantially conical hole shape having an axis S1 as a central axis, and the Z is opened on the inner wall of the air inlet 131 - _ «^ ^目 ^ Open / fly cylinder cover One end side of the outer surface of 121 is tapered. The fuel injection body 170 is attached to the containing portion via an adapter 1 (which is a separate member of a structural member) formed separately from the cylinder head 121. In a state of being mounted in the containing portion 137, the bobbin S1 coincides with the adapter 1 (the engine axis is coincident. The fuel injector 170 has

One end side of the body 17 2; a fuel injector body 172 having an injection port 171 formed in the fuel injector and a fuel supply hose connection portion 172a, 140301.doc -12· 201005175 The other end side of the body 172 is convex. The fuel injector i7 is conventionally known in construction and thus will be simplified. As shown in Fig. 3, the injection port 171 is formed to become a central axis in a state in which the fuel injector is attached to the containing portion 137 via the adapter. The direction in which the axis S1 advances is the direction in which the fuel injector 17 is in the nozzle direction. The axis S1 is oriented in a direction passing through the center of the circular exhaust valve opening 128 or in the vicinity thereof. More specifically, the axis S1 is set at an appropriate position and angle such that the fuel injected from the injection port 17 and the fuel-air mixture flowing through the intake port 131 cause the air to move, such as the rolling airflow in the combustion chamber c. . Here, the direction of advancement along the axis 81 toward the intake valve opening 128 is defined as the 2 axis S1 forward facing forward (injection direction of the fuel injector 17A) and the opposite direction defined as an axis 81 rearward (with the fuel injector) 170 mouth shot in the opposite direction). As shown in Figs. 6 and 7, the adapter 1 is a resin integrally molded member, which is formed with a flange 19 and a cylindrical wall portion formed in a multi-stepped cylindrical shape;

The flange is elongated in the shape of an elongated plate in which the axis 81 protrudes in a radially outward direction only in a radial direction outward (four) P. In the convex elongated portion of the convex (four), a vertical; 〇_τ... the locking hole 19a penetrates parallel to the axis S1. In the flange 19, a portion on the opposite side of the locking hole ... on the center of the shaft (four) forms a concave portion 19b toward the front side in the direction of the axis 81 from the rear side. The cylindrical wall portion 11 includes: a tube-shaped siemens-shaped large straight portion 12' which is adjacent to the flange 19; a cylindrical small-diameter portion 14 which is smaller than the large-diameter portion on the squash 140301.doc -13 · 201005175 12; and a multi-stepped tapered cylindrical intermediate portion 13 between the large diameter portion 12 and the small diameter portion 14. The large diameter portion 12, the intermediate portion 13 and the small diameter portion 14 are formed coaxially. On the large diameter portion 12, there is formed a first mounting groove having a square cross-sectional shape recessed on the outer surface and extending circumferentially along the outer surface. In the first mounting groove 31 & a seal ring 31b is assembled, which is a fluorine series like a plastic ring type which is excellent in heat resistance. The first mounting groove 3u and the sealing ring 3 1 b constitute a first sealing portion 31. On the small-diameter portion 14, there is formed a second mounting groove 32a having a square cross-sectional shape recessed on the outer surface and extending circumferentially along the outer surface. In the second mounting groove 32a, a seal ring 32b is assembled which is a fluorine series like a plastic ring which is excellent in heat resistance. The second mounting groove 32a and the sealing ring 32b constitute a second sealing portion 32. The material constituting the seal rings 31b and 32b is not limited to the fluorine-based adhesive, but a material having a material property (e.g., heat resistance, gasoline resistance, and water resistance) to the extent that it is allowed to be mounted on an engine is preferably used. The intermediate portion 13 is reduced in the outer diameter and the inner diameter in a multi-stepped tapered manner and connects the large diameter portion 12 and the small diameter portion 14. As shown in FIG. 4, when the fuel injector body 172 is mounted in the cylindrical wall portion 11, the inner peripheral surface of the large diameter portion 12 and the inner peripheral surface of the intermediate portion 13 are assembled with the outer peripheral surface of the fuel injector body 172. . Further, the tip end of the fuel injector body 172 is in contact with the tip end stepped portion of the intermediate portion to position the fuel port 7' to the tip end side of the intermediate portion 〖3. At this time, a projection formed on the fuel injector body 172 (not shown 140301.doc • 14·201005175) is fitted in the positioning portion 19b to position the fuel injector body 172 relative to the adapter 10 at the axis. Around S1. Between the outer peripheral surface of the fuel injector body 172 and the inner peripheral surface of the large-diameter portion 12, there is a seal ring 172b which is a fluorine-like adhesive-like ring which is excellent in heat resistance. The seal ring 172b is configured to seal the fuel. The gap between the injection body 172 and the cylindrical wall portion 11 prevents air from leaking to the outside of the cylinder ring 172b. The material constituting the seal ring 17215 is not limited to the fluorine-based adhesive, but is preferably a material having a material property (e.g., heat resistance, gasoline resistance, and water resistance) that allows mounting on an engine. As shown in Figs. 4 to 7, at the tip end side of the intermediate portion 13, four communication holes 15 are formed. The communication holes 15 are arranged in a row along the circumferential direction of the cylindrical wall portion at intervals of 9 turns. The shape and size of each of the communication holes 15 are set to be the same. As best seen in Figures 7 and 9, each of the communication holes 15 is formed as a long hole elongated in the circumferential direction of a Z-cylindrical wall portion 11 and, more specifically, elongated in the circumferential direction. Rectangular hole. Between the adjacent communication holes 15, a column portion 16 is formed which is a portion for separating the communication holes 15. As shown in Fig. 7, each of the communication holes 15 is positioned with respect to the ejection opening 171 positioned at the tip end side of the intermediate portion 13 in the direction of the axis si of the cylindrical wall portion u. Among the opening edges of each of the through holes 15 opening at the inner surface side of the cylindrical wall portion, extending in a direction intersecting the ejection direction of the fuel injector 17A and located at the side close to the ejection opening m The edge portion knife 15a is located on a plane p (shown only in Fig. 7) perpendicular to the direction of the axis S1 in a range other than the end corner portion R. Preferably, the distance between the plane p and the injection port 171 is set to be as short as possible to enhance fuel atomization. 140301.doc -15- 201005175 As shown in FIGS. 7 and 9, in the middle of the cylindrical wall portion knife 11 in which each of the communication holes 15 is formed, the outer surface side is formed into a tapered shape along the axis si direction. The shape (more specifically, when the axis 81 is viewed from the side, the outer surface of the cylindrical wall portion 2 is tapered forward to about one-half of each of the communication ports 15, and then forwards along the axis si Extending), and the inner surface side is formed along the axis si direction. Each of the communication holes 15 penetrates in a direction perpendicular to the direction of the axis S1. By forming the shape as mentioned in the text, the area of the opening plane 15p on the outer surface side of the cylindrical wall portion 11 in each of the communication holes 15 (the area surrounded by the virtual double dotted line in Fig. 9, Actually, the area of the curved surface is smaller than the area 15q of the opening plane on the outer surface side (the area of the range surrounded by the dotted line in Fig. 9, actually the area of the curved surface). In other words, each of the through holes 15 is formed in an aperture shape which is reduced in cross-sectional area from the outer surface side of the cylindrical wall portion toward the inner surface side thereof. Preferably, the resin forming the adapter 10 of the first embodiment is high in heat resistance, thermal insulation, gasoline resistance, water resistance and strength. Specifically, it is preferred to use a phenol resin (generally upper temperature limit: about 180.) or PPS (polyphenylene sulfide) resin (general temperature upper limit: about 260.) as the resin. This makes it difficult to conduct the south temperature of the cylinder head 121 to the fuel injector 170 while ensuring that the adapter 丨〇 secures the fuel injector 170. As shown in FIG. 8, the adapter 1 formed of a resin can be molded by using a pair of split molds 91a and 91b and a slide core 92 for injection molding or Transfer molding. Specifically, the split molds 91a and 91b have an assembly surface extending along a section cut along line VIII-VIII (shown in FIG. 6) and including the axis S1 I40301.doc -16· 201005175 of the cylindrical wall portion ^ And configured to form the outer surface of the adapter 10 and the four communication holes 15. The slide core 92 is slidable in the direction of the axis si of the cylindrical wall portion 11 and is formed to form the inner surface of the cylindrical wall portion 11. As shown in Fig. 6, in each of the communication holes 15 which is in the shape of a sector as seen from the direction of the axis S1, the angle formed by the two linear sides of the sector form is set to 90 degrees. One of the two sides is parallel to the νίπ-νΐΐΐ section, and the other is perpendicular to the VIII-VIII section. Therefore, according to the split molds 91 & and 91|3 having the fitting faces extending along the VIII_VIII section, the molded adapters 10 can be removed from the split molds 91a and 91b without causing any of the molded communication holes 15 damage. The sliding anger 92 is formed to have a shape capable of simultaneously forming the locking hole 19a and the positioning portion 19b. Further, in Fig. 6, the flange 19 itself is asymmetrical with respect to the section VIII-VIII. Therefore, when the section of the ¥111-乂111 is used as a fitting surface, it is impossible to remove the portion of the mold which is adjacent to the locking hole 19a from the mold. In order to solve this problem, 'the portion of the split mold 91a corresponding to the vicinity of the locking hole 19a corresponding to the flange j9 is convex toward the split mold 911) to partially deform the assembly faces of the split molds 9U and 9lb. The mold removes the vicinity of the locking hole 19a of the flange 19. As shown in FIG. 4, when the cylindrical wall portion u of the adapter 10 is inserted into the containing portion 137 and the fuel injector 170 is held by the adapter, the flange 19 and the outer surface of the fly cylinder cover 121 are contact. Then, a bolt (not illustrated) is inserted into a mounting hole (not illustrated) formed in the fuel injection body 172 and the locking hole 19a and internally threaded (not illustrated) formed in the outer surface of the cylinder head pi Engage. Therefore, the fuel injector 17 is fastened via the adapter 1 to the 140301.doc 201005175 containing portion 13 7 . The large diameter portion 12 is positioned at the outer surface side of the cylinder head 121 and the adapter 1 is positioned in the containing portion 137. The outer peripheral surface of the large diameter portion is fixed in an assembled manner to the wall surface of the containing portion ip near the outer surface of the cylinder head 121. At this time, the 'first sealing portion 31 is sealed to the outer peripheral surface of the large diameter portion 12 and the containing portion 137. Between the wall surfaces. In a state in which the adapter 10 is disposed in the containing portion 137, the small direct portion 14 is positioned near the side of the intake valve opening (2) and in the direction of the axis si of the injection port 171 (along the fuel injector 17) The ejection direction) protrudes forward i. The outer peripheral surface of the diameter portion 14 is fixed in an assembled manner to the wall surface of the containing portion 137 adjacent to the air inlet 131. At this time, the second sealing portion (4) is sealed to the small diameter portion 14 The outer peripheral surface is between the wall surface of the containing portion 137. Therefore, the outer surface of the cylindrical wall portion 11 forms a first to 174a with the wall surface of the containing portion 137. The first chamber 174a is centered on the axis S1. Further, at the inner surface side of the (four) portion u, a first to 174b first to 174b are formed to extend forward in the direction of the axis S1 and communicate with the air inlet 131 while being surrounded by the inner peripheral surface of the small diameter portion 14 and The wall portion of the nano portion η? is surrounded. The first chamber 17A and the second chamber i74b are communicated by the communication hole 15. The first chamber 174a and the second chamber 174b constitute a chamber 174. The bypass passage from the throttle body 160 One of the 18 下游 downstream side openings 18 flutters with the first chamber 17 of the chamber 174 4a is connected. The bypass passage 18 is connected to the upstream side opening 18〇& via, for example, a connecting pipe 180c and a hose 180 (1 (see Fig. 2). As shown in Fig. 4, 'located in the cylindrical wall portion丨Each of the outer surface sides of the crucible is 140301.doc • 18- 201005175 The opening of the communication hole 15 is offset rearward in the direction of the axis S1 with respect to the downstream side opening 180b of the bypass passage i8 in the chamber 174. This will be achieved. By bending the flow passage of the auxiliary air flowing from the first chamber 174a of the chamber 174 toward each of the communication holes 15, the auxiliary air to be introduced to the second chamber is in all directions centered on the line S1 (360). .) is more uniform.

As shown in FIGS. 4 and 5, the column portion 16 for dividing the portion adjacent to the communication hole 15 is disposed in the projection range E obtained by the following means (only shown in FIGS. 4 and 5). The opening surface of the downstream side opening 1 80b of the bypass passage 180 at the side of the chamber m is projected to the cylindrical wall along the central axis S2 of the bypass passage 丨8 (shown only in FIG. 5) Part u side. This will be achieved by causing the auxiliary air to be introduced into the first chamber 17 of the chamber 174 to contact one of the column portions 16 to agitate it. From the viewpoint of achieving uniformization of the auxiliary air in all directions centered on the central axis 81, the central axis S2 located near the rib of the downstream side end opening 18 of the bypass passage 18〇 passes through the central axis S1 of the chamber 174, which is considered to be better. . However, in this case, the processing steps of the cylinder head 121 using the five-axis machine become complicated', and thus it is difficult to achieve a reduction in manufacturing cost in some cases. For this reason, in the embodiment! The central axis S2 of the bypass passage 18〇 located near the downstream side opening 18讣 deviates from the central axis si of the chamber 174 to achieve a simplification of the processing steps of the cylinder head 121 using the five-axis machine. In the fuel injector 170 constructed as described above, fuel in a fuel tank (not illustrated) is introduced to the fuel injector body via a fuel supply hose (not illustrated) and a fuel supply hose connection portion 172a. 172. The solenoid-operated valve installed in the fuel injector body 172 is synchronized with the opening and closing operation of the intake valve 132 in the fuel injector body 172. The opening and closing are performed at predetermined timings to direct the fuel from the injection port 171 in the direction of the axis S1 (along the fuel) The spray direction of the sneeze (10) is sprayed forward. Therefore, the fuel-air mixture of fuel and intake air is introduced into the combustion chamber c. This fuel injection timing is controlled by a controller, for example, an ecu engine control unit. At this time, the 'first and second throttle valves 161 and 162 are controlled by the rider's throttle operation to swing around the respective rocker shafts 1613 and 162& to control the flow from the throttle body 160 to the intake port 31. The flow rate of the intake air and the flow rate of the auxiliary air introduced into the first chamber 174 & The second throttle valve 162 is coupled to a throttle operating cable (not illustrated) coupled to the throttle handle of the handle 1〇3 shown in FIG. The first throttle valve i6i is coupled to a linked delay mechanism (not illustrated) for transmitting the operation of the throttle cable (not illustrated) in a delayed manner. Therefore, when the rider increases the amount of operation of the throttle handle, the opening degree of the second throttle valve 162 corresponds to the operation 篁. On the other hand, the opening degree of the first throttle valve 161 is kept in a completely closed state until the throttle handle is operated for a predetermined operation amount. When it exceeds the pre-turn operation amount, the opening degree is increased by the same ratio while being delayed with respect to the second throttle valve 162. For example, as shown in FIG. 3, when the engine is in an idle state (idle state) or in a low load state (in a state in which the operation amount of the throttle handle is small), The throttle valve 161 is in a fully closed state. Therefore, the flow rate of the intake air flowing from the throttle body 16 constituting the main passage to the intake port 131 becomes zero. On the other hand, the second throttle valve 162 is not in a fully closed state, and thus the auxiliary air is introduced from the upper 140301.doc • 20- 201005175 the side opening 180a via the bypass passage 18 to the first chamber of the chamber 174. 74a. Then, this auxiliary air is introduced into the vicinity of the ejection port 171 in the servant of the second chamber 17 via each of the communication holes 15. Therefore, the atomization of the fuel to be injected from the ejection port 171 is enhanced. The auxiliary air simultaneously cools the tip end side of the fuel injector body 171. Next, when the engine becomes a high load state (in which the operation amount of the throttle handle is large), the first throttle valve 161 is no longer in a fully closed state and increases in opening degree, which in turn The flow rate of the intake air to flow from the throttle body 160 to the intake port 131 is increased. Therefore, the intake air to be introduced into the combustion chamber c is increased, and thus the output of the engine 120 is increased. In addition, the opening degree of the first throttle valve 162 is further increased, thereby causing more auxiliary air to be introduced into the second chamber 174b from the upstream side opening 110a via the bypass passage 18, the first chamber 174a, and each of the communication holes 15. Near the injection port 171. Therefore, the atomization of the fuel injected from the injection port 171 is further enhanced. The cooling effect of the auxiliary air on the tip end side of the fuel injector body 171 is maintained. In a high load state, when the amount of operation of the throttle handle is further increased, the opening degree of the first throttle valve 1 61 corresponds to its further increase. Therefore, the flow rate of the intake air flowing from the throttle body 160 to the intake port 131 - further increased - causes the output of the engine 120 to increase step by step. In this case, although the opening degree of the second throttle valve 162 is further increased, the difference between the pressure in the intake port 131 and the pressure in the bypass passage 18〇 is increased, thereby achieving the desired One of the peaks of the flow rate of the auxiliary air introduced into the bypass passage 180. 140301. (j〇c - 21 · 201005175 4_ Description of the function and effect of the embodiment 1 except for the flange 19, the portion of the adapter 1 & 丨 ( (that is, ' along the axis S i direction

(in the direction in which the fuel injector 17 is sprayed, W) extends to surround the pericardium 171, along the radial partition 174, and has each of the tubular wall portions 11 formed in the vicinity of the ejection opening 171. The hole-shaped wall portion 11) of the hole 15 is formed to function as a partition member of the engine 120 of the first embodiment. In the engine 120 of the first embodiment, the first month - the first sealing portions 31 and 32 are sealed in the forming chamber 174 at positions where each of the communicating holes 15 forward and backward in the direction of the axis S1 is interposed. The wall surface of the nano portion 137 is between the outer peripheral surface of the cylindrical wall portion. In other words, not only the first sealing portion stops from the first chamber 174a of the chamber 174 to the outside of the cylinder head 121, but also the second sealing portion 32 prevents the air from the first chamber 174 & toward the air passage constituting the main passage Direct air leakage of 131. Therefore, the auxiliary air introduced into the first chamber 174a via the bypass passage 180 in this engine 12A can be blown into the vicinity of the injection port 17 1 in the second chamber 174b via each of the communication holes 15 to enhance the fuel. Atomization. Therefore, the engine 120 of Embodiment 1 can improve the atomization efficiency of the fuel. Further, in this engine 120, the containing portion 137 having a wall surface 137 & forming a chamber 174 is formed in the cylinder head 121 and the opening is opened at the outer surface of the cylinder head. The adapter 10 is a member formed separately from the cylinder head 121. The fuel injector 170 is mounted in the containing portion 137 via the adapter 10. Therefore, in this engine 120, a member for mounting the fuel injector 17A in the cylinder head 121 and a member for the compartment 174 can be constituted by a single member, so that an increase in the number of components can be prevented. 140301.doc -22- 201005175 Further, in the engine casing 20, the first and second sealing portions 31 and 32 are first formed at both sides of each of the communication holes 15 in the direction of the axis S1 of the injection port 171. The second ampoules 31a and 31b are formed by the seal rings 31bA32b which are respectively fitted in the mounting grooves 31a and 32a. The adapter 1 is configured such that the seal rings 3 lb and 32b can be mounted thereon to achieve a sealing structure only at the side of the fuel injector I70. Therefore, the assembly work of the fuel injector 171 and the engine 12A can be easily performed. Further, in this engine 120, each of the communication holes 15 is formed in a magnified shape in a circumferential direction Φ. For this reason, the auxiliary air to be introduced from each of the communication holes 15 toward the injection port 171 is concentrated near the ejection port under the premise that the opening area is the same as that of a circular hole or an elongated hole elongated in the direction of the axis 81. 171 is possible. Therefore, in this engine 12, the auxiliary air can be efficiently introduced to the injection port 171, resulting in improved atomization efficiency. On the other hand, in the case of a circular hole, in order to satisfy the above-mentioned preconditions, it is necessary to arrange the holes in a zigzag configuration or to increase the aperture, thereby causing the effect of concentrating the auxiliary air Φ near the ejection port 171 to deteriorate. Further, with this configuration, it is difficult to shorten the size of the adapter 10 in the axial direction. Further, in this engine 120, four communication holes 15 are arranged along the circumferential direction of the cylindrical wall portion u. Therefore, the introduction of the auxiliary air can be carried out via a plurality of portions arranged in a dispersed state in the circumferential direction without passing through a single through hole, thereby making it possible to perform atomization of the fuel more efficiently. In particular, in this embodiment, since the communication holes 15 are arranged in a row in the circumferential direction as compared with the zigzag configuration, shortening the adapter in the axial direction can be easily performed. 140301.doc • 23- 201005175 Further, in this engine 120, among the winter opening edges of each of the communication holes 15 opening at the inner surface side of the cylindrical wall portion ,, along a jet with the fuel injector 170 The edge portion 15a extending in the direction intersecting the direction and located at the side close to the ejection opening i7i is located on a plane p perpendicular to the direction of the axis S1 (the ejection direction of the fuel injector ι7) in a range other than the end corner portion R . Therefore, in this engine m, the auxiliary air to be introduced from the per-communication hole 15 toward the ejection port 171 can be more effectively concentrated in the vicinity of the ejection port i7i. Therefore, the atomization efficiency can be further improved. Further, in this engine 120, the area 15p of the opening of each of the communication holes 15 at the inner peripheral surface side of the cylindrical wall portion u is set smaller than the opening of each of the communication holes 5 at the outer peripheral surface side. Area Bq. For this reason, each of the communication holes 15 can exert an orifice effect, thereby increasing the flow velocity of the auxiliary air to be introduced from the first chamber 174a to the second chamber via each of the communication holes 15. Therefore, in this engine 12, the atomization efficiency is further improved. Further, in this engine unit, a portion in which the cylindrical wall portion 11 of each of the communication holes 15 is formed is formed such that the outer surface side thereof is in the direction of the axis 81 (in the ejection direction of the fuel injector 7). The inner surface side is tapered and formed along the axis "direction (in the ejection direction of the fuel injector 170). Each of the communication holes 15 penetrates in a direction perpendicular to the axis S1 (in the ejection direction of the fuel injector 17). Therefore, in this engine 120, each of the communication holes 15 can be easily formed in the above-described shape of the orifice to avoid an increase in manufacturing cost. Further, in this engine 120, it is assumed that each of the communication holes 15 is adjacent to the ejection port 17 The direction of the axis S1 of the cylindrical wall portion U (with the fuel injector 14030l.doc • 24 - 201005175

The direction in which the ejection direction is opposite is rearwardly positioned, and the auxiliary air introduced from the fa through the mother-communication hole 15 into the second chamber (10) has to bypass the tip end portion of the fuel injector body m having the ejection port 171. However, in this engine 120, each of the communication holes 15 is positioned forward relative to the injection port μ in the direction of the axis si of the cylindrical wall portion 11 (the ejection direction of the fuel injector 17). For this reason, the auxiliary air introduced from the first chamber center to the second chamber 174b via each of the communication holes 15 reaches the ejection port ΐ7ι and does not move back in the second chamber 174b. Therefore, the atomization efficiency is further improved. Further, in this engine 12G, the opening of each of the communication holes 15 at the outer surface side of the cylindrical wall portion u is in the direction of the axis S1 with respect to the downstream side opening 180b of the bypass passage 18 (with the fuel injector 17) The direction of the opposite direction of the spray is shifted backward. Therefore, the auxiliary air introduced into the first chamber 17A from the bypass passage 18A strikes the outer peripheral surface of the cylindrical wall portion 并 and flows into the second chamber i74b via each of the communication holes 15 while changing the direction "backward" along the axis The direction of flow. Therefore, in this engine 120, the auxiliary air to be introduced into the second chamber 17 can be further homogenized in all directions centered on the axis s 1 to promote better atomization. In the engine 120, one of the column portions 16 for separating the plurality of columns 16 adjacent to the communication hole 15 is disposed within the projection range e of the downstream side opening 1 80b of the bypass passage. The auxiliary air introduced into the first chamber 174a is agitated by the column 16. Therefore, the auxiliary air advanced into the second chamber 174b can be more uniform with respect to the respective directions centered on the axis §1, thereby contributing to better In the first embodiment, the central axis S2 of the bypass passage 180 deviates from the center axis si of the chamber 174 seen from the direction of the axis S1. However, also in this case, By the agitation effect of the column portion 16, The auxiliary air advancing toward the inside of the cylindrical wall portion can be easily homogenized in various directions centered on the axis S1. Further, in the engine 120, the adapter 10 is operable and operable with respect to the metal. It is made of a resin excellent in formability, and thus it is possible to achieve a reduction in manufacturing cost. In particular, in the embodiment, as the resin forming the adapter, thermal insulation, heat resistance, gasoline resistance, The resin and PPS resin are high in water resistance and strength. Therefore, even under strict use environment, the adapter 10 can be secured to the cylinder head 121. g In particular, the adapter 10 is composed of one Therefore, a resin having a high heat resistance is formed. Therefore, even if the cooling type of the engine 120 is a water-cooling type or an air-cooling type, the high temperature of the cylinder head m can be achieved to the hard conduction of the fuel injector 17 while maintaining the adapter ίο itself Therefore, there is no need in the embodiment 1 for a heat insulating material which increases the necessity of intervening between the adapter and the cylinder head 12 when the adapter 1 is made of metal. here In the engine 120, the manufacturing cost reduction by reducing the number of components can be achieved. ❹ In addition, in this engine 120, the resin is located at the rear side in the direction of the axis s1 (the opposite side to the injection direction of the fuel injector 170). At the end portion of the cylindrical wall portion 11 of the formed adapter 10, the flange 19 to be fastened to the cylinder head 121 is integrally molded with the fuel injector no. Therefore, in this engine 120, The simplification of the structure of the device and the shortening of the assembly man-hour can be achieved. Further, one body molding of the flange 19 can reduce the manufacturing cost. Further, in this engine 120, the flange 19 has a flange 140301.doc for the flange 140301. -26- 201005175 A locking hole 19a that is locked with the fuel injector m. Therefore, it is sufficient to provide only one locking portion, thereby facilitating an easy assembly work. Further, in this engine m, the flange 19 has a concave positioning portion 19a for urging the circumferential portion of the cylindrical wall portion n with respect to the fuel injection by cooperating with the fuel injector 17. The device 170 is positioned around the axis 81. Therefore, the operating time for assembling the fuel injector 170 in the adapter can be reduced in this engine 12G. Further, the adapter 1 of the first embodiment itself has the first and second sealing portions 31 and 32, so that the number of parts can be reduced and the assembly work time can be reduced. The manufacturing method of the adapter 10 for performing m is as follows: the above-mentioned split molds 91a and 91bu and the slide core 92 are used to integrally mold the resin adapter to form the per-communication hole 15 at the same time. Therefore, a significant reduction in manufacturing cost can be achieved as compared with the case where each of the communication holes 15 is formed in the adapter by a post-processing. ❷ <Embodiment 2> As shown in Fig. 10, the engine of Embodiment 2 is different from the engine of Embodiment 1 in that: - the heat insulating member 299 is provided on the containing portion on which the adapter 10 is attached The wall surface of the U7; the opening of each of the communication holes 15 at the outer peripheral surface side of the cylindrical wall portion " with respect to the downstream side opening of the bypass passage 180 in the chamber 174 is oriented in the direction of the axis S1 (fuel injection) The ejection direction of the device 170 is shifted forward. The implementation of '^ 々 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 140301.doc -27- 201005175 Thermal insulation member 299-shaped Μ- wherein the multi-stepped tapered hole-shaped containing portion 137 is formed at the inner surface side and the outer surface side is in contact with the steam cover ΐ2ι and fastened thereto Stepped tapered hole shape. The method of fastening the heat insulating member 299 may be a method, but it is preferable to seal a gap between the heat insulating member and the cylinder head to prevent air from leaking to the outside of the cylinder head 121. Preferably, the material forming the heat insulating member 299 is high in thermal insulation, heat resistance, gasoline resistance, water resistance and strength. In particular, it is preferred to use ceramic, phenol resin or PPS resin. The engine of the embodiment 2 constructed as described above also exerts the same functions and functions as those of the engine of the embodiment i. Further, in this engine, even in the case where the thermal insulation of the adapter 1 is not sufficiently ensured, more specifically, a transfer formed of a material having insufficient heat (for example, resin or metal) is employed therein. In the case of the device 1, the thermal insulation member 299 ensures that the high temperature of the cylinder head m can be achieved to the hard conduction of the fuel injector 170. So in this engine, regardless of engine cooling

Types, one water-cooled or one air-cooled, fuel injectors 17 are guaranteed to be protected. Further, each of the communication holes 15 in the engine is shifted forward in the direction of the axis S1 (the ejection direction of the fuel injector i 70) with respect to the downstream side opening 1 80b of the bypass passage 180. Therefore, the auxiliary air introduced into the first chamber 174a from the bypass passage 180 strikes the outer peripheral surface of the cylindrical wall portion 且 and flows into the second chamber 174b via each of the communication holes 15 while changing the direction along the axis s 1 The direction of the flow before. Thus, in this engine 120, the auxiliary air to be introduced into the second chamber 174b can be further homogenized in various directions centered on the axis S1 by 140301.doc -28- 201005175, thereby facilitating better atomization. &lt;Embodiment 3&gt; Fig. 11 shows an engine structure of Embodiment 3. In the above-described Embodiments 1 and 2, the other end (downstream side end) of the bypass passage 180 is directly connected to the metal cylindrical head 121. In Embodiment 3, the downstream end of the bypass passage 300 is connected to the cylinder head 3〇1 via a connecting member 310 made of a synthetic resin. The cylinder head 301 has a circular mounting portion 303' which is concentrically recessed relative to the containing portion 302 (chamber 174) on the upper surface of the cylinder head and has a larger diameter than the upper end portion of the containing portion 302. The diameter. The connection chamber 310 has a cylindrical body 311 which is formed integrally with the adapter 1A. At a lower end portion of the main body 311, a small-diameter cylindrical portion 3 12 ' is integrally formed. The small-diameter cylindrical portion has an outer diameter concentrically arranged with the main body 3 且 and which is reduced in a stepwise manner on the outer diameter. A seal groove 313a is formed on the outer periphery of the cylindrical portion 312 and is fitted by a seal ring 313b, and this seal groove 313a forms a third seal portion 313 with the seal ring 313b. The main body 311 has a circular connecting hole 314 which penetrates from the outer peripheral surface in the axial direction to the inner peripheral surface. Further, on the outer periphery of the main body 3, a cylindrical connecting portion 315 which is formed concentrically with the connecting hole 314 is formed in a convex manner. At this point, the connection port 315, the downstream side end portion of the bypass passage 300 is airtightly assembled and fastened. In a state in which the cylindrical portion 312 is fitted in the mounting portion 303 and the lower end surface of the main body 311 is in contact with the upper surface of the cylinder head 301, the connecting member 310 is attached to the & rainbow cover. In the mounted state of the connecting member, the inner peripheral wall of the main body 311 constitutes a fuel injector in the inner peripheral portion of the inner portion 3〇2 (the first chamber 174 of the chamber 174 is approximately 140301.doc •29·201005175). Further, the end side is substantially a half area (the upper side area in Fig. 11). Further, the third sealing portion 313 hermetically seals between the outer peripheral surface of the cylindrical portion 312 and the inner peripheral surface of the mounting portion 303. The adapter 1 previously attached to the fuel injector 170 is inserted into the body 311 of the connecting member 310. Therefore, the fuel injector 17 is attached to the cylinder head 300 via the connecting member 310 and the adapter ( Translator's Note: Correctly 3〇1) In the attached state of the fuel injector 170, the inside of the chamber 174 is partitioned by the cylindrical wall portion 11 into an outer peripheral side first chamber 174a and an inner peripheral side second chamber 174b. The inner peripheral surface of the main body 311 faces the first chamber i74a. The downstream side of the bypass passage 300 connected to the connecting portion 315 communicates with the inside of the first chamber 174a via the connecting hole 314. The connecting hole 3 14 is fueled with respect to the communicating hole 15 Direction of spray In this embodiment 3, the connecting member 31 made of synthetic resin is interposed between the bypass passage 300 and the cylinder head 301 so that the bypass passage 3 does not engage with the cylinder head 301 made of metal. Direct contact. Therefore, the heat of the cylinder head 3〇1 is hardly transmitted to the bypass passage 300. This suppresses the concentration of oxygen caused by the thermal expansion of the auxiliary air flowing through the bypass passage 3, which avoids deterioration. The combustion efficiency is deteriorated by the concentration of oxygen. <Other Embodiments> The present invention is not limited to the embodiments explained with reference to the description and the drawings. For example, the following embodiments are still within the technical scope of the present invention. Various modifications may be made without departing from the gist of the present invention. J4030l.doc • 30· 201005175 (i) By way of example, in the embodiment, the description is so simplified that the engine 120 is singled out. The valve opening 128, the single exhaust valve opening m, and the single fuel injector 17 are constructed, but the engine according to the present invention is not limited to this configuration. For example, the engine 12A may include any number of exhaust valve openings, - Intake valve opening and fuel injector. (2) Adapter (separator) can be formed from common materials such as, for example, resin, fiber reinforced resin or metal. Fiber reinforced resin can be a common reinforcing fiber. Such as, for example, glass fiber or carbon fiber. The adapter (the partition structure can be manufactured by double molding using glue and resin, and it can be configured such that the communication port should be maintained without deformation and its vicinity) The resin is formed while the remainder is formed of a gel. The adapter (separating member) may be composed of a single member or a combination of a plurality of members. In the case where the adapter (separator member) is formed of a resin, the resin is preferably high in thermal insulation, heat resistance, oil repellency, water resistance, and strength. (3) The Qi-shaped wall portion does not need to be completely cylindrical as long as it is formed in a φ cylindrical shape. For example, as the first and second sealing portions, a gasket, a sealant, and a gel can be used for baking. As the seal ring, any commercially available member made of, for example, metal, glue or elastomer can be used. (4) The communication hole can have any shape such as, for example, a vertical elongated hole, • horizontal The elongated hole, a circular hole, a single hole, and a rectangular hole, the number and size of the π f 卞 形 ° 、 、 、 、 、 、 、 、 、 、 、 、 、 、 (5) The processing method of the adapter (separating member) may be a manufacturing method such as, for example, cutting, injection molding, transfer molding, or compression molding. (6) In the above-described Embodiment 3, it is configured such that the connecting member is in direct contact with the adapter, such as -3, - 201005175 (separating member), but the connecting member and the adapter ( The partition member) can be in a non-contact state. (7) In the above-described Embodiment 3, the connecting member directly faces the first chamber, but it may be configured such that the connecting member does not directly face the first chamber. In this case, it may be configured such that a hole portion for communicating between the connecting member and the first chamber is formed in the cylinder head. (8) In the above embodiment 3, the wall surface forming the first chamber is covered by the cylinder head

And the connecting member, but it may be configured such that the entire wall surface forming the first chamber is constituted only by the connecting member. (9) In the above-described Embodiment 3, the connecting member has a cylindrical shape, but is in any shape different from a cylindrical state (for example, a square shape). (10) In the above-mentioned Embodiment 3, the connecting member is a member formed separately from the adapter (separating member), but it can be used to perform two functions (one is to mount the remaining injector on the cylinder head) One or both of the functions and functions of 1 as a partitioning member separating the chambers in the axial direction. 〇1) In the above embodiments 1 to 3, the adapter for mounting the fuel injector to the steam cylinder also functions as a partition member, but another dedicated partition member may be used to supplement the adapter. . (12) In the above embodiments 1 to 3, the ejector is fastened to the steam by locking a bolt: the cover (separator member) and the fuel injector may be separately fastened to the steam cap. L, but the adapter and the fuel injection (13) In the above-mentioned Embodiment 3, the opening of the camera, the connector and the connecting member are integrated and the first chamber and the first portion are omitted by using the member in which the rotating portion is sealed. A sealing portion::, sealing portion and third sealing M0301.doc -32- 201005175 [Simplified illustration of the drawing] [Fig. 1] Fig. 1 is a side view of a motorcycle in which an engine of Embodiment 1 is applied; Figure 2] Figure 2 is a cross-sectional view of the engine of Embodiment 1; [Figure 3] Figure 3 is an enlarged cross-sectional group of one of the main parts of the engine shown in Figure 1, [Figure 4] Figure 4 is Figure 3 1 is an enlarged cross-sectional view of the main part; [Fig. 5] Fig. 5 is a cross-sectional view showing the VV cut surface of Fig. 4; [Fig. 6] Fig. 6 is a transfer seen in the direction of the arrow VI in Fig. 4. [FIG. 7] FIG. 7 is a cross-sectional view showing a section VII-VII of FIG. 6; [FIG. 8] FIG. 8 is a cross-sectional view showing a section VIII-VIII of FIG. 6; 9] Fig. 9 is a side view rgl · garden showing the vicinity of the communication hole shown in Fig. 8,

[ Fig. 10] Fig. 10 is an enlarged cross-sectional view showing a main portion of an engine according to Embodiment 2; and Fig. 11 is an enlarged cross-sectional view showing an essential part of an engine according to Embodiment 3. [Description of main component symbols] Adapter (separator member) The tubular wall portion communication hole extends in a direction intersecting the injection direction of the fuel injector and is located at a side close to the injection port 10 11 15 15a 140301.doc • 33- 201005175 The edge portion 15p of the opening edge of the hole is located at the inner side of the cylindrical wall portion, and the area 15q of the opening of the communicating hole at the outer side of the cylindrical wall portion is the area of the opening of the communicating hole at the outer side of the cylindrical wall portion. 19a locking hole 19b positioning portion 31 first sealing portion 31a first mounting groove 31b sealing ring 32 second sealing portion 32a second mounting groove 32b sealing ring 120 engine 121 cylinder head 122 cylinder block 124 piston 128 intake valve opening 131, 160, 141 Main channel (131.·. Inlet, 16〇...throttle body, 141...intake pipe) 137 Inclusive part 137a Forms a wall surface of a chamber 140301.doc -34- 201005175 170 Fuel injector 171 Injection port 174 chamber 180 bypass passage 180a one end of the bypass passage (upstream end opening) 180b the other end of the bypass passage (opening end opening) 299 An insulating member projection range P E C combustor a plane perpendicular to the direction of injection of the injector SI the display of the axial direction of the injection of the injector, the central axis of the display S2 of the cylindrical wall portion of the bypass passage axis

140301.doc •35-

Claims (1)

201005175 VII. Patent application scope: 1 · An engine comprising: -: a cylinder for containing a piston in a reciprocable manner; a "several cylinder cover" which forms a combustion chamber with the cylinder block The cylinder head - having at least a portion of the main passage for introducing intake air into the combustion chamber via an intake valve opening; ^ a fuel injector 'mounted on the mad cover and having - for the intake a valve opening for injecting a fuel injection port; wherein the injection port is located inside thereof; a bypass passage having an end portion communicating with the intermediate portion of the main passage and the other end communicating with the chamber; a partition member having - surrounding the mouthpiece of the nozzle while extending along the injection direction of the fuel injector to radially partition the cylindrical wall portion of the chamber, and forming a communication hole near the fuel injection port of the cylindrical wall portion; And a second sealing portion for sealing between the outer surface of the partitioning member and the outer surface of the partitioning member at a position behind and in front of the communicating hole in the spraying direction. Item 1 engine Wherein the cylinder head has a receiving portion that is open to the outside, the receiving portion has a wall surface constituting the chamber, and wherein the partition member is a member formed separately from the steam cap, and wherein the fuel nozzle is sprayed The device is configured to be contained in the portion via the partition member. - 戈人3. The engine of claim 2, wherein the first and second sealing portions of the flute include: 140301.doc 201005175 The first and second mounting slots are in the front and rear of the connecting hole And formed on the outer surface of the partition member; disposed in the mounting grooves. The engine of the present invention, wherein the communication hole is formed as a long hole elongated in a circumferential direction thereof. 5. The engine of claim 4, wherein the plurality of communication holes are disposed along a circumferential direction of the cylindrical wall portion. 6. 7. The engine of claim 5, wherein the opening of the plurality of communicating holes at the inner surface side of the portion of the inner portion of the cylinder (four) extends in a direction intersecting the jetting direction of the fuel injector An edge portion at a side close to the jet π is located on a plane perpendicular to the ejection direction within a predetermined length range. The area of the communication hole in which the engine of claim 1 is located at the inner surface side of one of the cylindrical wall portions is set to be smaller than the communication hole at the outer surface side of one of the cylindrical wall portions. An engine of one of the openings, wherein the portion of the cylindrical wall in which the communication hole is formed is formed such that the outer surface side is tapered in the sputtering direction and the inner surface side is extended in the ejection direction. The communication hole penetrates in a direction perpendicular to the ejection direction. 9. The engine of claim 1, wherein the communication hole is positioned to be forward in the injection direction than the injection port. 10: The engine of claim 5, wherein the opening of each of the communication holes located at the outer surface of the cylindrical wall portion is relative to the opening of the bypass passage 140301.doc -2- 201005175 in the chamber The direction of the spray or the direction of the shift 0 opposite to the direction of the spray: the engine of the length 5, wherein the cylindrical wall portion has a plurality of pillar portions = a portion for connecting the communication holes, and wherein the plurality of portions At least one of them is positioned by the projection surface obtained by projecting the opening surface of the channel located at the side of the chamber along the central axis of the bypass channel toward the side of the wall portion. The engine of claim 1, wherein the partition member is made of a resin. 13. The engine of claim 12, wherein one of the resin phenol resin and the PPS (polyphenylene sulfide) resin is formed in the partition member. 14. The engine of claim 2, wherein the partition member is made of resin, and a flange system spray direction body fixed to the cylinder head together with the fuel injector is formed at a rear end of the cylindrical wall portion Somewhere. 15. The engine of claim 14, wherein the flange has a locking aperture for locking the fuel injector together. 16. The engine of claim 15, the flange having a raised or recessed locating portion for surrounding the tubular wall portion by engaging the fuel injector The axis is positioned relative to a position. 17. The engine of claim 2, wherein a thermal insulation member is provided on a wall surface of the containing portion to which the partition member is attached. 18. The engine of claim 1, wherein a connecting member made of synthetic resin is attached to the cylinder head to face the chamber, and wherein the connecting member has a connecting hole of 140301.doc 201005175, the chamber being in communication. The connecting hole is for connecting the other end of the bypass passage and 19, a partitioning member for use in an engine, comprising: a cover: a cylinder for 'reciprocally receiving a piston - a cylinder head 'which together with the cylinder block forms a combustion chamber, at least part of which is for introducing air into the combustion chamber via the intake air intake; a fuel injector, fuel toward The intake valve is open Mounted on the cylinder head i having an injection port for injecting a port; and a bypass passage having an end communicating with the intermediate portion of the main passage and the other end communicating with the chamber in which the injection port is located ; Wherein the partition member has a cylindrical wall portion extending around the injection port while extending in the spray direction of the mouthpiece to radially partition the chamber, and a communication is formed in the vicinity of the fuel injection port of the cylindrical wall portion. a hole, and wherein the first and second sealing portions for sealing between a surface constituting the chamber and an outer surface of the partition member are provided at a position behind and in front of the communication hole in the ejection direction . A method of manufacturing a partition member, wherein (four) split molds and a slide core are molded by a resin, such as the partition member of claim 19, the split molds are poetically formed to form the partition members a mating surface of the surface and the communication hole, wherein the mating surfaces coincide with a plane including an axis of the cylindrical wall portion; the sliding core is configured to form an inner surface of the cylindrical wall portion, and the α eccentricity Slides in the direction of one of the cylindrical wall portions. 140301.doc -4 -