CN1150375C - Radiator loading structure in a vehicle - Google Patents

Abstract

In a vehicle in which an engine main body is mounted to a vehicle body frame in an attitude in which an axis line of a cylinder bore is substantially in line with a front and rear direction of the vehicle body frame and a radiator constituting a portion of a cooling apparatus capable of circulating cooling water of a water jacket is attached to the engine main body at a side of the cylinder bore, to promote air bleeding performance and water filling performance in the cooling apparatus while avoiding an increase in cost. Therefor, a water filling cap 88 is attachably and detachably mounted to an upper end of a water filling pipe 87 extended upwardly from one end portion of an upper tank 77 in line with a front and rear direction of a vehicle body frame and a radiator 72 is attached to an engine main body 25 in an attitude of being inclined to a horizontal face such that the water filling cap 88 is disposed at a topmost position in a cooling apparatus 83.

Description

Radiator loading structure in a vehicle

technical field

The present invention relates to a radiator configuration in which an engine main body is mounted on a body frame with the axis of the cylinder bore substantially along the front-rear direction of the body frame, and upper and lower casings and cooling pipes connecting these casings are provided. A part of the cooling device that can circulate the cooling water of the water jacket, and a vehicle that is attached to the engine body at the side of the aforementioned cylinder bore, particularly relates to the improvement of the radiator mounting structure.

Background technique

In the prior art, for example, from Japanese Unexamined Patent Application Publication No. 59-78128, there is known a vehicle in which a radiator is mounted on an engine body mounted on a body frame in such a manner that it is disposed on the side of a cylinder bore provided in the engine body. .

In the engine disclosed in the above-mentioned Utility Laid-Open No. 59-78128, the cylinder barrel is mounted on the body frame in an upright position in the vertical direction. The direction is elongated, so the pipes in the cooling device have a large degree of freedom in the vertical direction of the piping, there is sufficient water pressure, and the air can be well discharged from the cooling device.

However, in a vehicle in which the engine body is mounted on the body frame so that the axis of the cylinder bore is substantially in the front-rear direction of the body frame, the length of the water cooling jacket provided on the engine body in the vertical direction is reduced, and the ducts of the cooling device are vertically aligned. The degree of freedom of piping in the direction is small, the water pressure is also low, it takes time to exhaust the air from the cooling device, and the water injection time is also prolonged.

In order to increase the water pressure, it is considered to use a radiator with a special shape in which the water nozzle protrudes upward from the upper box. At the same time, a water nozzle is installed on the box connected to the radiator and configured separately from the radiator. However, Such a structure leads to increased costs.

Contents of the invention

In view of the above circumstances, an object of the present invention is to provide a radiator mounting structure in a vehicle which can avoid an increase in cost and which can improve air discharge performance and water injection performance in a cooling device.

In order to achieve the above object, in the invention described in Scheme 1 of the present invention, the engine main body having the cylinder barrel in the vehicle loads the axis of the aforementioned cylinder barrel on the body frame substantially along the front-rear direction of the body frame; The radiator formed by connecting the lower case constitutes a part of the cooling device that can circulate the cooling water of the water jacket provided on the engine body, and the radiator is attached to the engine body at the side of the cylinder bore. In order to install the water supply nozzle detachably on the upper end of the water supply pipe extending upward from one end of the upper box body along the front-rear direction of the vehicle body frame, and place the water supply nozzle at the uppermost position in the cooling device to place the radiator Mounted obliquely to the engine block with respect to the horizontal plane.

According to this structure, by inclining the general-shaped radiator equipped with the upper and lower tanks and the cooling pipes connecting them with respect to the horizontal plane, the water supply pipe installed at one end of the upper tank The water supply nozzle at the upper end of the cooling device is placed at the top position of the cooling device, so that the cost increase caused by making the radiator into a special shape can be avoided, the water pressure difference in the cooling device will be increased, and the discharge from the water supply pipe can be improved. Air performance and water injection performance.

At the same time, the invention described in claim 2 of the present invention is characterized in that, in addition to the structure of the invention described in claim 1, on the other end of the aforementioned lower box body along the front and rear direction of the aforementioned vehicle body frame, a connection guide cooling water is provided. The connecting pipe of the first conduit is set so that the connecting pipe is at the lowest position in the cooling device, and the inclined posture of the radiator relative to the horizontal plane is set. With this structure, it is not necessary to enlarge the cooling pipe in the radiator. The length can discharge the air well from the lower part of the cooling device, further improving the water injection performance.

Furthermore, the invention according to claim 3 of the present invention is characterized in that, in addition to the structure of the invention according to claim 1 or 2, when viewed from the side, the radiator overlaps at least a part of the upper case. The position is arranged on the cylinder block of the aforementioned engine main body, and the aforementioned upper casing and the cylinder block are arranged in the overlapped range when viewed from the aforementioned side, a second conduit extending substantially horizontally, one end of which is connected to the water cooling jacket The other end of the second conduit is connected to the upper box. With this structure, the second conduit that makes the cooling water between the water cooling jacket and the radiator is shortened, and the cooling water of the cooling device can be shortened. The circulation loop is compacted.

According to the invention described in the above-mentioned scheme 1, it is possible to avoid making the radiator into a special shape, and it is also possible to avoid setting a water supply nozzle on a box body separately configured with the radiator, thereby avoiding increasing the cost. The higher water pressure in the cooling unit improves the air discharge performance and water injection performance from the water supply pipe.

At the same time, according to the invention described in Scheme 2, it is not necessary to increase the length of the cooling pipe in the radiator, the air can be discharged from the lower part of the cooling device well, and the water injection performance is further improved at the same time.

Furthermore, according to the invention described in Claim 3, the pipe connecting the radiator and the cylinder block is shortened, and the cooling water circulation circuit in the cooling device can be compacted.

Description of drawings

Fig. 1, is the overall side view of scooter.

FIG. 2 is an enlarged view of the main part of FIG. 1 .

Fig. 3 is a sectional view taken along line 3-3 of Fig. 2 .

Fig. 4 is a side view of line 4-4 in Fig. 3 .

Fig. 5 is a side view corresponding to Fig. 4 in a state where the radiator cover is removed.

Fig. 6 is a sectional view taken along line 6-6 of Fig. 4 .

Fig. 7 is a plan view taken from the 7th direction of Fig. 6 .

Figure 8 is a perspective view of the radiator and radiator cover.

Detailed ways

The implementation form of the present invention will be described below according to an embodiment of the present invention shown in the accompanying drawings.

Fig. 1～Fig. 8 represent an embodiment of the present invention, Fig. 1 is the general side view of scooter, Fig. 2 is the enlarged view of main part of Fig. 1, Fig. 3 is along Fig. 2 3-3 line Sectional view, Fig. 4 is a side view along line 4-4 of Fig. 3, Fig. 5 is a side view corresponding to Fig. 4 in the state where the radiator cover is removed, Fig. 6 is a side view along line 6-6 of Fig. 4 7 is a 7-direction plan view of FIG. 6, and FIG. 8 is a perspective view of the radiator and the radiator cover.

First, in Fig. 1 and Fig. 2, the body frame F of the scooter V equipped with the front wheel Wf steered by the steering handle 11 and the rear wheel Wr driven by the swing power unit P is divided into the front body frame 12, middle body frame 13, rear body frame 14 three parts. The front body frame 12 is composed of an aluminum alloy casting integrally equipped with a head tube 12a, a down tube 12b, and a pedal support portion 12c. An intermediate body frame 13 that supports the power unit P to swing freely up and down via a pivot shaft 15 is composed of an aluminum alloy casting and is joined to the rear end of the aforementioned front body frame 12 . The rear body frame 14 extending along the upper rear of the power unit P is formed of an annular pipe, and the fuel tank 16 is supported thereon. On the middle body frame 13, a helmet box 17 is supported, and the helmet box 17 and the fuel tank 16 are covered openably and closably by a cover 19 integral with the vehicle seat 18.

The power unit P is composed of a water-cooled single-cylinder four-stroke engine E and a belt-type continuously variable transmission T extending from the left side of the engine E to the rear of the vehicle body. On the rear end of the middle body frame 13. An air cleaner 21 is supported on the continuously variable transmission T. On the right side of the continuously variable transmission T, a muffler 22 is supported, and under the engine E, a main frame 23 that can be erected and collapsed is supported.

3 to 5, the engine body 25 of the engine E is equipped with a first engine block 32 and a second engine block 33 divided by a dividing plane 30 extending up and down along the crankshaft 31. The body 32 is integrally equipped with a cylinder block 32a provided with a cylinder bore 41 and a crankcase half 32b constituting a crankcase together with the second engine block 33, the cylinder head 34 is joined to the front end of the first engine block 32, and the cylinder A head cover 35 is joined to the front end of the cylinder head 34 .

Such an engine main body 25 is mounted on the body frame F so that the axis L of the cylinder bore 41 is slightly inclined forward and upward, and is basically along the front-rear direction of the body frame F. The sprocket 27 is swingably supported on the pivot 15 fixed to the intermediate body frame 13 of the body frame F via a support buffer rubber 28 .

The belt-type continuously variable transmission T is equipped with a right side casing 37 and a left side casing 38 which are combined with each other. on the side. Furthermore, a reducer case 39 is coupled to the rear right side surface of the right side case 37 .

A piston 42 slidably fitted inside a cylinder bore 41 provided in the first engine block 32 is connected to the crankshaft 31 via a connecting rod 43 . The camshaft 44 is rotatably supported on the cylinder head 34 , and an intake valve and an exhaust valve (not shown) provided on the cylinder head 34 are driven to open and close by the camshaft 44 . A timing chain 45 is accommodated in the sprocket passage 40 provided on the first engine block 32 , and the timing chain 45 is wound around a drive sprocket 46 provided on the crankshaft 31 and a driven sprocket provided on the camshaft 44 . On sprocket 47. As a result, the camshaft makes one rotation for every two rotations of the crankshaft 31 .

On the left end of the crankshaft 31 protruding into the inside of the right case 37 and the left case 38, a drive pulley 54 is provided. The driving pulley 54 is provided with a fixed side pulley half 55 fixed on the crankshaft 31 and a movable side pulley half 56 close to or away from the fixed side pulley half 55. The movable side pulley half 56 follows the crankshaft 31 The increase in the number of revolutions is applied in a direction closer to the fixed-side pulley half body 55 by the centrifugal counterweight 57 moving radially outward.

The driven pulley 59 installed on the output shaft 58 between the rear portion of the right side casing 37 and the speed reducer case 39 is equipped with a fixed side pulley half 60 relatively rotatably supported on the output shaft 58 and a movable pulley half. The movable side pulley half 61 close to or away from the fixed side pulley half 60 is biased by the spring 62 against the fixed side pulley half 60 . At the same time, an engine clutch 63 is provided between the fixed-side pulley half 60 and the output shaft 58 . At the same time, a V-shaped belt 64 is wound between the driving pulley 54 and the driven pulley 59 .

An intermediate shaft 65 and an axle 66 parallel to the aforementioned output shaft 58 are supported between the right case 37 and the reduction case 39 , and a reduction gear train 67 is arranged between the output shaft 58 , the intermediate shaft 65 and the axle 66 . Meanwhile, the rear wheel Wr is provided on the right end of the axle shaft 66 that penetrates the speed reducer case 39 and protrudes to the right side.

Then, the rotational power of the crankshaft 31 is transmitted to the driving pulley 54, and from the driving pulley 54, it is transmitted to the rear wheel Wr via the V-belt 64, the driven pulley 59, the starting clutch 63 and the reduction gear train 67.

When the engine E rotates at a low speed, since the centrifugal force acting on the centrifugal counterweight 57 of the driving pulley 54 is small, the spring 62 of the driven pulley 59 makes the groove width between the fixed side pulley half body 60 and the movable side pulley half body 61 Decrease, the gear ratio becomes lower. When the number of revolutions of the crankshaft 31 increases from this state, the centrifugal force acting on the centrifugal counter weight 57 increases, so that the groove width between the fixed side pulley half body 55 and the movable side pulley half body 56 of the driving side pulley 54 decreases. Along with this, the groove width between the fixed-side pulley half 60 and the movable-side pulley half 61 of the driven pulley 59 increases, and the gear ratio changes steplessly from low to high.

Referring to FIG. 6 at the same time, a rotor 69 is fixed on the right side of the crankshaft 31, and a stator 70 constituting an alternator 68 together with the rotor 69 is fixed on the first and second engine blocks 32, 33 in a manner surrounded by the rotor 69. . On the right end portion of the crankshaft 31 outside the alternator 68, a cooling fan 71 is fixed, and the radiator 72 is arranged so that the cooling fan 71 is sandwiched between the radiator 72 and the alternator 68. The radiator 72 is equipped with a support case 73 that surrounds the cooling fan 71 and is fixed on the first and second engine blocks 32, 33. The radiator 72 is made of synthetic resin fastened to the support case 73 of the radiator 72. The manufactured radiator cover 74 is covered from the outside.

Referring to Fig. 7 and Fig. 8 simultaneously, the louver 75 that introduces air from the outside is set on the outer surface of the radiator cover 74, and a plurality of discharge ports 76... are set on the aforementioned support case 73 at the side of the aforementioned cooling fan 71, When the cooling fan 71 operates, the air introduced from the louver 75 passes through the radiator 72 to cool the radiator 72, and is discharged to the outside through the discharge port 76 . . .

The radiator 72 is equipped with an upper box body 77, a lower box body 78, a cooling pipe 79 connecting the upper and lower box bodies 77, 78, and the aforementioned support shell 73, and the support shell 73 is fixedly installed on the upper and lower box bodies 77, 78 up. Further, the cooling air introduced from the louver 75 to the radiator 72 side cools the cooling water in the radiator 72 through the cooling pipe 79 .

The aforementioned radiator 72 constitutes a part of a cooling device 83 capable of circulating cooling water in the water cooling jacket 82 provided on the cylinder block 32a of the first engine block 32 of the engine main body 25 and the cylinder head 34, and the cooling device 83 is equipped with a A water pump 84 for supplying cooling water in the aforementioned water cooling jacket 82, a radiator 72 and a thermal switch 85 installed between the aforementioned water cooling jacket 82 and the suction port of the aforementioned water pump 84, and the thermal switch 85 is set according to the temperature of the cooling water. The cooling water from the water cooling jacket 82 bypasses the radiator 72 and returns to the water pump, and the cooling water from the water cooling jacket 82 via the radiator 72 returns to the water pump 84.

The thermal switch box 86 containing the thermal switch 85 inside is combined with the right side of the cylinder head 34, and the water pump 84 located on the right end of the camshaft 44 is accommodated in the space surrounded by the cylinder head 34 and the thermal switch box 86. .

On one end portion (rear end portion in this embodiment) of the upper box body 77 along the front-rear direction of the vehicle body frame F, a water supply pipe 87 extending upward is integrally provided, and on the upper end of the water supply pipe 87 The water supply nozzle 88 opened and closed by the rotation operation is installed. Meanwhile, on the other end portion (front end portion in this embodiment) of the lower case 78 in the front-rear direction of the body frame F, a connecting pipe 89 protruding to the front side is integrally provided.

This radiator 72 is installed on the first and second engine blocks 32, 33 of the engine main body 25 in a posture inclined only at an angle α with respect to the axis L of the cylinder bore 41 provided on the engine main body 25, whereby when the When the engine main body 25 is mounted on the vehicle body frame F, the radiator 72 assumes a posture of only the angle of inclination α with respect to the horizontal surface, and the water supply nozzle 88 is arranged at the uppermost position in the cooling device 83, and the connection The pipe 89 is disposed at the lowest position in the cooling device 83 .

By inclining the radiator 72 to the axis L of the cylinder bore 41 by an angle α in this way, the radiator 72 can be arranged so as to avoid the pivot 15 for supporting the engine main body 25 on the body frame F, and at the same time, The exhaust pipe 90 connected to the exhaust port of the cylinder head 32 can be arranged securely in the space behind the radiator 72 , and the degree of freedom in handling the exhaust pipe 90 can be improved.

One end of the first conduit 91 is connected to the aforementioned connecting pipe 89 of the radiator 72, and the other end of the first conduit 91 is connected to the thermal switch box. 86 on.

The radiator 72 is disposed at least at a portion (in this embodiment, at the front) overlapping the cylinder block 32a of the engine main body 25 when viewed from the side. In the range where the cylinder block 32a overlaps, one end thereof is connected to the second conduit 92 on the cylinder block 32a in a manner connected to the upper part of the water cooling jacket 25, and is arranged to extend horizontally substantially along the width direction of the motorcycle. The second conduit 92 The other end of is connected on the front portion of upper casing 77.

In addition, one end of a third conduit 93 such as a rubber hose that guides cooling water from the water pump 84 is connected to the thermal switch box 86, and the other end of the third conduit 93 leads to the bottom of the water cooling jacket 82 and is connected to the bottom of the water cooling jacket 82. On the connection pipe 94 on the cylinder block 32 a of the first engine block 32 .

On the carburetor 95 that is connected to the intake port of the cylinder block 32, a pipeline (not shown) that guides the cooling water coming from the water cooling jacket 82 for heating the carburetor 95 is connected. The cooling water heated by the carburetor 95 is introduced into the fourth conduit 96 such as a rubber hose on the thermal switch 85 to be connected to the thermal switch box 86 .

On the top of the thermal switch box 86, a fifth conduit 97 such as a rubber hose for discharging air from the water pump 84 is connected, and the fifth conduit 97 is connected to the cylinder block from the top of the water cooling jacket 82 for discharging air. The conduit (not shown) on the upper part of 32a is connected by a sixth conduit 98 such as a rubber hose, and the sixth conduit 98 is connected to the upper part on the rear side of the case 77 on the upper part of the radiator 72 .

Furthermore, one end of a seventh conduit 100 such as a rubber hose is connected to the water supply pipe 87 , and the other end of the seventh conduit 100 leads to the atmosphere and is connected to a water storage tank (not shown) provided separately from the radiator 72 . Thereby, when the temperature of the cooling water in the radiator 72 becomes high and expands, excess cooling water overflows in the aforementioned water storage tank, and when the temperature of the cooling water in the radiator 72 decreases, the cooling water flows back from the aforementioned water storage tank to Inside the radiator 72. The circulation of the cooling water between the radiator 72 and the water storage tank discharges the air trapped in the water supply pipe 87 into the water storage tank. That is, the air can be exhausted from the cooling device 83 well even when the engine E is running.

In this cooling device 83, when the warm-up operation of the engine E is completed, the cooling water discharged from the water pump 84 at the front end of the camshaft 44 is supplied to the first engine block through the thermal switch box 86 and the third conduit 93. 32 and the water cooling jacket 82 inside the cylinder head 34, the engine E is cooled by the water cooling jacket 82, and then supplied to the upper case 77 of the radiator 72 through the second conduit 92. Then, the cooling water flows from the upper casing 77 into the lower casing 78 through the cooling pipe 79 , and the cooling water whose temperature drops during passing through the radiator 72 returns to the aforementioned water pump 84 through the first conduit 91 and the thermal switch 85 . On the other hand, when the engine E is in warm-up operation and the temperature of the cooling water is low, the thermal switch acts to make the cooling water circulate around the radiator 72, and the cooling water does not pass through the radiator 72 in the water cooling jacket 82 and the carburetor 95. And circulation between water pump 84, make temperature rise rapidly.

7 and 8, on the radiator cover 74 that covers and fastens the radiator 72 to the support case 73 of the radiator 72, the position restricting part 74a is integrally provided in such a way as to cover the water supply nozzle 88. , the position limiting portion 74a can be fitted to the water nozzle 88 in the closed position, and can install the radiator cover 74 on the radiator 72, and at the same time prevent the water nozzle 88 from rotating to the open position. Moreover, the notch 99 which exposes part of the water nozzle 88 to the outside is provided in the position control part 74a.

The function of this embodiment will be described below. In the radiator 72 constituting a part of the cooling device 83 that can circulate the cooling water of the water cooling jacket 82 provided on the engine main body 25, on the rear end portion of the upper case 77 along the front-rear direction of the body frame F, the radiator 72 is integrally formed. A water supply pipe 87 extending upward is provided, and a water supply nozzle 88 is detachably installed on the upper end of the water supply pipe 87, but the water supply nozzle 88 is at the uppermost position in the aforementioned cooling device 83 at an angle β with respect to the horizontal plane. The radiator 72 is attached to the engine body 25 in an inclined posture. That is, the radiator 72 of the general shape with the upper and lower boxes 77, 78 and the cooling pipe 79 connecting these boxes 77, 78 will be installed on the device in a manner inclined forward relative to the horizontal plane. The water supply nozzle 88 on the upper part of the water supply pipe 87 at the rear end of the upper casing 77 is arranged at the uppermost position in the cooling device 83 .

Thereby, avoid radiator 72 to be made into special shape, and avoid the increase that is connected with radiator 72, the increase of the cost that water supply nozzle is arranged on the casing that is separately configured with radiator 72, when injecting water from water supply pipe 87 simultaneously , the water pressure difference in the cooling device 83 is large, which can improve the performance of discharging air from the water supply pipe 87 and the performance of water injection.

Moreover, a connecting pipe 89 connecting the first conduit 91 leading the cooling water from the radiator 72 into the thermal switch 85 to the front end of the lower box body 78 along the front and rear direction of the body frame F is provided so that the connection The pipe 89 is in the mode of the lowermost position in the aforementioned cooling device 83, and the inclined posture of the radiator 72 relative to the horizontal plane is set. Exhaust air efficiently to further improve water injection performance.

At the same time, the radiator 72 is arranged at a position where at least a part of the upper case 77 overlaps the cylinder block 32a when viewed from the side, and the upper case 77 and the cylinder block 32a are arranged substantially along the One end of the second conduit 92 extending horizontally is connected to the cylinder block 32a in the manner of being connected to the water cooling jacket 82, and the other end of the second conduit 92 is connected to the upper casing 77, so that the cooling water can flow between the water cooling jacket 82 and the cooling jacket 82. The second conduit 92 fluidly connected between the radiators 72 and the cylinder block 32 a is shortened, so that the cooling water circulation and return flow of the cooling device 83 can be compacted.

Furthermore, in cooperation with the water supply nozzle 88 in the closed position, the radiator cover 74 can be installed on the radiator 72, and at the same time, the position restricting part 74a that prevents the water supply nozzle 88 from rotating to the open position is integrally covered with the water supply nozzle 88. Therefore, when the radiator cover 74 is installed on the radiator 72, when the water supply nozzle 88 is in the locked position, the position restricting part 74a can be fitted to the water supply nozzle 88. The radiator shroud 74 is mounted on the radiator 72 . Therefore, the position of the water nozzle 88 can be confirmed only by the work of attaching the radiator cover 74 to the radiator 72 without any special work of confirming that the water nozzle 88 is in the closed position, and the assembly performance can be improved.

Moreover, by fitting the position limiting portion 74a of the radiator cover 74 to the water nozzle 88, the water nozzle 88 is prevented from rotating from the locked position to the open position, so the water nozzle 88 can be kept in the locked position without increasing the number of parts.

In addition, the notch 99 for making the water nozzle 88 face the outside is provided in the position regulating portion 74a, so that the presence of the water nozzle 88 can be easily confirmed from the outside of the radiator cover 74 .

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various design changes can be made to the present invention without departing from the scope described in the claims.

For example, in the above-mentioned embodiment, the application to the motorcycle V has been described, but the present invention is also applicable to other vehicles such as a motor tricycle.

Claims (3)

1. A radiator mounting structure in a vehicle in which an engine main body (25) having a cylinder bore (41) is mounted such that the axis of the cylinder bore (41) is along the front-rear direction of the body frame (F) to the body frame (F); a radiator (72) with upper and lower boxes (77, 78) and cooling pipes (79) connected between these boxes (77, 78), in the cylinder barrel The side part of (41) is installed on the described engine main body (25); It is characterized in that, water nozzle (88) is removably installed in the upper box body (77) along the front and rear direction of the body frame (F). One end of the upper end of the water supply pipe (87) extends upwards, so that the water supply nozzle (88) is at the uppermost position in the cooling device (83) and the radiator (72) is inclined relative to the horizontal plane. Installed on the engine main body (25). 2. The radiator loading structure in the vehicle according to claim 1, characterized in that, the connecting pipes (89) connecting the first conduits (91) for guiding the cooling water are arranged in front and rear along the body frame (F) On the other end of the lower box (78) in the direction, set the radiator (72) relative to the horizontal plane so that the connecting pipe (89) is at the lowest position in the cooling device (83). tilt state. 3. The mounting structure of the radiator in the vehicle according to claim 1 or 2, characterized in that, when viewed from the side, the radiator (72) is arranged on the cylinder block ( 32a) at a position overlapping with at least a part of the upper case (77); when viewed from the side, the horizontally extending first Two conduits (92), one end of the second conduit (92) is connected to the cylinder block (32a) in a manner leading to the water cooling jacket (82), and the other end of the second conduit (92) is connected to On the upper box body (77).

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