JPH0610643A - Oil storage device outside the crankcase of the engine lubrication device - Google Patents

Abstract

(57) [Summary] [Structure] An oil receiving chamber (52) for the crank chamber is provided below the inside of the crank chamber (51), and oil storage chambers (58) outside the crank chamber are provided on both left and right sides of the engine (E). The oil receiving chamber (52) and the oil accommodating chamber (58) are communicated with each other through the inter-chamber communication portion (61), and the engine (E) is provided with the inter-room oil transfer means (P). Gas phase space (59/59) of the oil chamber (58) outside the crankcase
They communicate with each other through the gas communication passageway (73), and the blow-by gas outlet of one of the crank chamber outside oil storage chambers (58) is connected to the oil separator (7
Connect to 6). [Effects] The left and right oil storage chambers outside the crank chamber can be made small to reduce the protrusion from the crankcase, and can be arranged so as to overlap with the projected area portions of the auxiliary devices attached to the engine. As a result, the width of the entire engine can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outside-crank-room oil accommodating device for transferring oil in a lower part of a crank chamber to an oil accommodating chamber outside the crank chamber in an engine lubricating device.

[0002]

2. Description of the Related Art Some crankcase oil accommodating devices for this type of engine lubrication device have the following basic structure, as disclosed in, for example, Japanese Patent Laid-Open No. 59-5820 (see FIG. 16). That is, the crank chamber (51) of the engine (E)
An oil receiving chamber (52) inside the crank chamber is provided, a storage chamber tank (57) is attached outside the crank chamber, and an oil storage chamber (58) outside the crank chamber is provided inside the storage chamber tank (57). The crank chamber oil receiving chamber (52) and the crank chamber oil receiving chamber (58) are in communication with each other via the inter-chamber communication portion (61).

Further, the engine (E) is provided with an inter-room oil transfer means (P), and by operating the inter-room oil transfer means (P), the oil in the crank chamber oil receiving chamber (52) is removed. From the inter-chamber communication part (61) to the oil chamber outside the crank chamber (58)
To the oil level (L) inside the oil chamber (58) outside the crank chamber.
2) is configured to be held higher than the oil level (L1) in the crank chamber oil receiving chamber (52).

The crankcase outside oil storage chamber (58) in the above-mentioned basic structure is conventionally constructed as follows.

That is, the engine (E) is inclined as a whole, and the cylinder block (11) has an opening on the side wall of the crankcase (7) on the side opposite to the cylinder part (21). The storage chamber tank (57) is attached with the (116) in between. In the storage chamber tank (57), a partition wall (118) is erected from the bottom to a predetermined height along the baffle plate (116), and on the baffle plate (116) side of this partition wall (118). aisle
(119) has the oil chamber outside the crank chamber on the opposite side
(58) is formed. The inter-chamber communication portion (61) is opened at the bottom of the baffle plate (116), and a check valve (114) is attached to the outlet side of the inter-chamber communication hole (61). The crank chamber oil receiving chamber (52) is connected to the inter-chamber communication portion (61) and the passage.
(119) and the oil storage chamber (58) outside the crank chamber in order.

The check valve (114) opens with a positive pressure component (112) and closes with a negative pressure component (113) of the pulsating pressure (111) generated in the crank chamber (51). As a result, the oil in the crank chamber oil receiving chamber (52) is pressure-fed to the passage (119) by the positive pressure component (112) which is the inter-room oil transfer means (P), and is blown into the passage (119) together with the blow-by gas. After being pushed up, the oil is sent to the oil chamber outside the crank chamber (58) over the upper end of the partition plate (118).

[0007]

In the above-mentioned prior art, the oil chamber outside the crank chamber is provided in the chamber tank (57) attached to one side of the crankcase (7) of the inclined engine (E).
(58) is formed. On the other hand, the oil storage chamber outside the crank chamber requires a large volume in order to increase the amount of oil and prolong the period until oil replacement. As a result, the oil storage chamber (58) outside the crank chamber largely protrudes laterally from the crank case, which causes a problem that the entire width of the engine (E) becomes large.

An object of the present invention is to reduce the protrusion of the oil storage chamber outside the crank chamber from the crank chamber and to reduce the overall width of the engine while being able to store a large amount of oil.

[0009]

The present invention is characterized in that, in the above-mentioned basic structure, in order to achieve the above-mentioned object, the above-mentioned crank chamber oil accommodating device (58) is constructed as follows. .

Invention 1 An oil storage chamber (58) outside the crank chamber is provided on each of the left and right sides of the engine (E), and a vapor phase space (59.59) of the oil storage chamber (58.58) outside the crank chamber is provided. ) Gas communication passage
(73) communicates with one of the oil chambers outside the crank chamber (58)
The blow-by gas outlet (73d) is connected to the oil separator (76).

Invention 2 In addition to Invention 1, the following configuration is added.
Gas phase space of the left and right crank chamber outside oil storage chambers (58, 58)
Intermediate part (73b) of the gas communication passage (73) that communicates with each other (59, 59)
Are formed so as to cross the lower space in the crank chamber.

Invention 3 In addition to Invention 1 or Invention 2, the following configuration is added. A pair of front and rear vertical ribs (64, 64) are projected laterally outward from at least one of the left and right case side walls (8) of the crankcase (7) of the engine (E), and these vertical ribs (6
At least one of the left and right vertical path ends of the gas communication passageway (73) is formed in the inter-rib space between the ribs.

Invention 4 In any one of the above inventions 1 to 3,
The following configuration is added. Room oil transfer means
(P) along with the operation of the engine (E), the crank chamber (5
It is configured by using the pressure (Pb) of blow-by gas (BG) generated in 1).

[0014]

Since the present invention is constructed as described above, it has the following effects.

(A) Since a plurality of oil storage chambers outside the crank chamber are arranged, a large amount of lubricating oil is retained as a whole,
Although it is possible to lengthen the period until the oil is changed, the crankcase outer oil storage chambers are arranged separately on the left and right sides of the crankcase, so that the crankcase outer oil storage chambers are made smaller. The protrusion from can be reduced. Further, although various auxiliary devices are attached around the engine, the oil chambers outside the crank chambers, which are arranged on the sides of the crankcase, can be arranged so as to overlap the projected area portions of these auxiliary devices. . As a result, the oil space outside the crankcase can be arranged by effectively utilizing the dead space due to the arrangement of the auxiliary devices in the engine body, and the overall width of the engine can be reduced.

(B) In the plurality of oil chambers outside the crank chamber, the gas phase spaces are communicated with each other through the gas communication passages, so that the blow-by gas outlet of one of the oil chambers outside the crank chamber is communicated with the oil separator. The gas phase space of the other oil storage chamber outside the crank chamber can be communicated with the oil separator via the gas communication passage only, and the cost of the apparatus can be reduced by installing only one oil separator.

(C) When the intermediate portion of the gas communication passage is formed so as to cross the lower space of the crank chamber, the pipe of the gas communication passage is not exposed outside the crank chamber.
Therefore, even if a tool or the like is dropped at the time of maintenance, external impact is not applied to this pipe, and deformation or damage can be prevented.

(D) When the road end portion of the gas communication passage is formed between a pair of front and rear vertical ribs protruding laterally outward from the lateral wall of the case, the vertical ribs reinforce the lateral wall of the crankcase. Therefore, the strength of the crankcase can be improved, and at the same time, the gas communication passage can be manufactured at low cost by omitting a part of the members.

(E) Further, when the inter-room oil transfer means is constructed by utilizing the blow-by gas pressure generated in the crank chamber due to the operation of the engine, unlike the prior art, the reciprocating motion of the piston in the crank chamber Even in a multi-cylinder engine in which the pulsating pressure due to is not generated, the present invention can be applied because the blow-by gas pressure is generated in the crank chamber, and the inter-room oil transfer means only uses this blow-by gas pressure. Therefore, it can be implemented with an extremely simple structure.

Further, in this case, the blow-by gas pressure in the crank chamber does not decrease even if the engine speed or load changes, and the oil level in the crank chamber oil receiving chamber can be pushed down sufficiently low at all times. . As a result, the oil does not continue to be abnormally splashed by the rotary motion part such as the crank arm, and it is possible to prevent the oil from overheating due to the abnormal splash and to prevent the poor lubrication and the oil deterioration.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 10 show an oil storage device outside a crank chamber of a lubricating device for a forced water-cooled vertical two-cylinder overhead valve vortex chamber type diesel engine.

[A] Arrangement of Auxiliary Components of Engine FIG. 2 is a perspective view of the entire engine. In FIG. 2, the accessories of the engine (E) are arranged as follows. That is, a radiator is provided on the front side of the engine body (1).
(2) is placed, and the air cleaner is on the left upper half on the left side.
(3), the muffler (4) is arranged on the upper half of the right side, the fuel tank (5) is arranged on the upper side, and the pair of left and right engine stands (6) are arranged on the lower parts of the left and right sides.

The rear half of each engine stand (6) is fixed to the left and right case side walls of the crankcase (7) of the engine body (1) respectively, and the radiator is provided on the front part thereof.
(2) is supported.

[B] Basic Structure of Engine Body FIG. 3 is a perspective view of the engine body. 4 is a left side view of the engine body, FIG. 5 is a right side view of the central longitudinal section, FIG. 6 is a vertical front view of the central portion of the front cylinder, and FIG. 7 is a vertical front view of the gear case portion.

3 to 7, the cylinder block (1
The cylinder head (12) and the head cover (13) are fixed in order on the upper side of (1), the oil pan (14) is on the lower side of the cylinder block (11), the gear case (15) is on the front side, and the water pump (16) is on the upper front side. ), A flange type fuel injection pump on the upper front part of the left side
A lubrication pump (19) is fixed to the pump housing (18) of (17) and the outer surface of the lower portion of the front wall.

A piston (22) is vertically slidably fitted in each of the two cylinders (21). Each piston (22)
Are connected to the two crank pins (25) of the crank shaft (24) via the connecting rods (23), respectively. The two crank pins (25) are different in phase of rotation from each other by 180 degrees.

The crankshaft (24) penetrates the crankcase (7) and the gearcase (15) in the front-rear direction,
The front wall (26), the intermediate wall (27), and the rear wall (28) of (7) are rotatably supported by a tunnel bearing device (29).
The crankshaft (24) has a fan drive pulley (34) outside the front side wall of the gear case (15), a crank gear (36) inside the gear case (15), and a flywheel outside the crank case rear wall (28).
(35) are fixed.

A radiator fan (31) is arranged on the front side of the water pump (16). The rotor of the water pump (16) and the radiator fan (31) are a fan shaft and a fan pulley (3).
2) The fan belt (33) and the fan drive pulley (34) are connected in this order to the crankshaft (24).

In the gear case (15), the crank gear (36)
A valve gear cam gear (38) and a fuel injection cam gear (39) are interlocked with each other via an idle gear (37). A lubricating pump (19) is interlockingly connected to the crank gear (36) via an oil pump gear (41). This Lubrication Pump (19)
Sucks oil from the oil strainer (42) arranged at the lower center of the front, rear, left and right in the oil pan (14) and pumps it to each lubrication part of the engine (1).

[C] Structure of Crankcase Outside Oil Storage Device of Lubricating Device FIG. 1 is a schematic perspective view showing flows of oil and blow-by gas from the crankcase inside oil receiving chamber to the crankcase outside oil storage chamber. 5 is a right side view of the longitudinal section of the engine body. FIG. 8A is a sectional view taken along the line IA-IA of FIG. 5, FIG. 8B is a sectional view taken along the line IB-IB of FIG. 5, and FIG. It is an exploded perspective view of the IX section of (A).

[C1] Structure of the oil chamber outside the crankcase As shown in FIG. 1, FIG. 8A and FIG.
At the bottom of the crank chamber (51) of (1), the crankcase (7)
And oil pan (14) across the crank chamber
(52) is provided. Also, outside the crank chamber (51),
A storage chamber tank (57) is attached to each of the left and right lower halves, and an oil storage chamber (58) outside the crank chamber is provided in each of the storage chamber tanks (57).

The storage chamber tank (57) is a crankcase.
An annular rib (54) integrally protruding from the outer surface of the recessed wall portion (8a) formed on the side wall (8) of (7) and an engine stand (6) latter half fixed to this annular rib (54). Formed box section (6
It consists of a). Therefore, the above-mentioned oil chambers (58) outside the crank chamber are formed in the mounting portions of the crankcase (7) and the engine stands (6), respectively, and the inner chamber portion (55) and the outer chamber portion (53) are formed. ) Is connected in parallel with the oil communication hole (56a) and the ventilation long hole (56b).

The inner storage chamber portion (55) is the recessed wall portion.
It is formed on the outer surface of (8a) and is surrounded by the annular rib (54). Further, the outer storage chamber portion (53) is formed in the box-shaped portion (6a) in the latter half of the engine stand (6) and opens to the crankcase (7) side. And engine stand
In (6), the box-shaped portion (6a) is fixed to the annular rib (54) with seven bolts (6b) sandwiching the gasket (56).

The gasket (56) is formed in a plate shape, and the oil communication hole (56a) is formed in the front and rear two places of the lower part thereof, and the ventilation long hole (56b) is formed in the upper part thereof. The outer storage chamber portion (53) and the inner storage chamber portion (55) are partitioned by the gasket (56) and communicate with each other through the oil communication hole (56a) and the ventilation long hole (56b).

[C2] Structure for connecting the oil receiving chamber inside the crank chamber and the oil receiving chamber outside the crank chamber The crank chamber oil receiving chamber (52) is connected to the chamber through the communication passage inlet (62) opened in the vicinity of the center in the front, rear, left and right. Passage (61)
The left and right gas separation chambers (66) and the left and right oil holes (67) communicate with the outer housing chamber portions (53) of the pair of left and right crank chamber oil housing chambers (58).

This inter-chamber communication passage (61) is a crankcase.
Transverse ridge (27a) protruding from the lower rear surface of the intermediate wall (27) of (7)
The inside penetrates in a straight line. The communication passage inlet (62) is opened at the center of the inter-chamber communication passage (61) so that it faces the center of the upper layer of the crank chamber oil receiving chamber (52) in the front-rear direction and the left-right direction. is there. At the left and right ends of the inter-chamber communication passage (61), the outlets of the communication passages are opened so as to face the lower portions of the left and right gas separation chambers (66).

Each of the left and right gas separation chambers (66) is formed in each of the inner storage chamber portions (55) so as to face upward at the slightly rear side of the center in the front-rear direction. This gas separation chamber (66)
The front and rear surfaces are partitioned by a pair of front and rear vertical ribs (63), the left and right surfaces are defined by the recessed wall portion (8a) and the gasket (56), and the bottom surface is partitioned by the lower wall portion of the annular rib (54). To be done.

An oil hole (67) is opened in the gasket (56) at the lower portion of the lateral outer surface of the gas separation chamber (66). Also,
A separation gas outlet (68) is opened on the upper surface of the gas separation chamber (66) so as to face the upper gas layer space (55a) in the inner storage chamber portion (55).

The pair of vertical ribs (63) for partitioning the front and rear surfaces of the gas separation chamber (66) are integrally projected laterally outward from the recessed wall portion (8a) of the crankcase lateral side wall (8). , The annular rib
(54) is integrally formed with the lower wall portion. Above gasket
(56) is a pressing rib (65) projecting integrally from the box-shaped portion (6a) of the engine stand (6) into the outer storage chamber portion (53),
It is pressed against each of the vertical ribs (54).

On the other hand, the left and right crank chamber oil storage chambers (5
The gas-phase spaces (59, 59) in (8) communicate with each other through a gas communication path (73), and this gas communication path (73) is a descending start end (7
3a), the transverse intermediate portion (73b), and the rising end portion (73c) are connected in this order.

The transverse intermediate portion (73b) passes through the transverse protrusion (27b) protruding from the lower front surface of the crankcase intermediate wall (27) in a straight line. The descending start end portion (73a) and the ascending end portion (73c) are juxtaposed in front of the gas separation chamber in each of the right and left inner storage chamber portions (55). Then, the front and rear surfaces have a pair of front and rear vertical ribs (64).
The crankcase recessed wall portion (8a) and the gasket (56) define the left and right surfaces of the annular rib (54), and the bottom surface of the annular rib (54) defines the top surface. The inner storage chamber portion (55) is opened so as to face the air layer space (55a).

[C3] Structure of Oil Transfer Means The engine (E) has inter-room oil transfer means (P). The inter-chamber oil transfer means (P) is provided with the pressure of blow-by gas (BG) generated in the crank chamber (51) when the engine (E) is operated.
It is configured by using (Pb).

That is, the blow-by gas pressure (Pb) in the crank chamber (51) first causes the oil in the crank chamber oil receiving chamber (52) to flow from the communication passage inlet (62) in the center of the upper chamber to the inter-chamber communication passage. (61) Via the gas separation chambers (66) and the oil holes (67), the outer storage chamber portions (55) and the inner storage chamber portions (55) of the pair of left and right crank chamber outer oil storage chambers (58) ( 53) And then flow in order and push up. This oil chamber outside the crank chamber
Due to the oil flowing into the (58), the air in the oil chambers outside the crank chamber (58) is pushed out of the oil chambers outside the crank chamber (58) through the left and right air pushing passages (74). After that, blow-by gas (BG) accumulated in the crank chamber (51)
Through the left and right breather derivation paths (75).
It is configured to lead to the outside of (51).

[C4] Structure of air extruding passage The left air extruding passage of the above air extruding passage (74) is such that the left inner accommodating chamber portion (55) is extended from the ventilation slot (56b).
Further, the outer storage chamber portion (53) communicates with the oil separator (76) through the oil separation chamber (70) from the oil return and ventilation long groove hole (72). This oil separator
(76) communicates with the combustion chamber via the breather pipe (77) and the intake passage.

The oil separation chamber (70) is an outer storage chamber portion.
It is provided by being partitioned by the partition wall (71) on the upper front side of (53),
The vent hole (56b) is formed in the gasket (56) so as to face the oil separation chamber (70). Also, slotted holes (72)
Are formed by the gap between the tip edge of the partition wall (71) and the gasket (56). The oil separator (76) is fixed on the upper wall of the oil separation chamber (70).

On the other hand, a ventilation elongated hole (56b) is formed in the upper rear part of the gasket (56) on the right side, and the air extruding path (74) on the right side is formed.
Is the ventilation slot (56b) on the right side and the inner storage chamber part on the right side.
(55) -Gas communication path (73) -Air layer space (55a) in the left side inner storage chamber part (55) -Vented long hole (56b) on the left-side and oil separation chamber (70) The outer storage chamber portion (53) on the right side is connected to the oil separator (76).

The above-mentioned pair of front and rear vertical ribs (64) integrally projects laterally outward from the recessed wall portion (8a) and also has an annular rib.
(54) is integrally formed with the lower wall portion. Then, the above-mentioned gasket (56) integrally projects from the box-shaped portion (6a) of the engine stand (6) into the outer storage chamber portion (53), and the pressing rib (65) is provided.
Are pressed against the vertical ribs (54). The vertical ribs (64) on the rear side of the descending start end portion (73a) and the rising end portion (73c), and the holding ribs (65) facing the vertical ribs (64) are provided on the left and right gas separation chambers (66). The front vertical ribs (63) also serve as the pressing ribs (65) facing the vertical ribs (63).

[C5] Structure of Breather Derivation Route Among the above breather derivation routes (75), the left side of the breather derivation route has a lower central portion in the crank chamber (51) with an inter-chamber communication passage.
(61) ・ Left side gas separation chamber (66) ・ Left side inner storage chamber part (5
The air layer space (55a), the ventilation long hole (56b), and the oil separation chamber (70) of 5) are connected in this order to the oil separator (76).

On the other hand, in the breather lead-out path (75) on the right side, the central lower part in the crank chamber (51) is defined by the inter-chamber communication path (61), the right gas separation chamber (66), and the right inner storage chamber part. Air space (55
a) ・ The descending starting end of the gas communication passage (73a) ・ Transverse intermediate part
(73b) -Ascending terminal (73c) -Left side inner storage chamber part (5
It is configured to communicate with the oil separator (76) through the air layer space (55a), the ventilation long hole (56b), and the oil separation chamber (70) of 5) in this order.

[C6] Structure for Maintaining Pressure in Crank Chamber The head cover (13) communicating with the inside of the crank chamber (51) is provided with a relief valve (43) on its upper wall as shown in FIG. is there. The relief valve (43) is closed when the pressure (Pb) of the blow-by gas (BG) accumulated in the crank chamber (51) is equal to or lower than the set pressure, and maintains the blow-by gas pressure (Pb) high. When the blow-by gas pressure (Pb) tries to rise abnormally due to an abnormality in the breather discharge path (75), this relief valve (48) opens and the excess blow-by gas pressure in the crank chamber (51) is exceeded. Release (Pb). This maintains the internal pressure of the crank chamber (51) in a normal pressure state.

Further, as shown in FIG. 4, the cylinder block (12) of the engine (E) has an oil inlet (7
8) is provided, and the oil detecting rod (80) is inserted into the crank chamber (51) through the oil detecting port (78). In this oil check port (78),
The oil detecting cap (82) fixed to the base end side of the oil detecting rod (80) is openably and closably closed, and the blow-by gas (BG) in the crank chamber (51) is connected to the oil detecting port (78). ) It is sealed so that it does not leak.

Next, a method of storing the oil of the lubricating device in the oil chamber outside the crank chamber by using the above device will be described.

[A] State of oil entering the crank chamber When the engine (E) is not operating, both the inside of the crank chamber (51) and the outside of the crank chamber oil storage chamber (58) are at atmospheric pressure. ing. For this reason, the oil level (L1) of the oil inside the crank chamber oil receiving chamber (52) has risen to the same height as the oil level (L2) of the oil inside the crank chamber outside oil storage chamber (58), It is higher than the specified oil level (L0) and has entered the crank chamber (51).

[B] Transfer by Extrusion of Oil When the engine (E) starts operating, a part of the expanded gas in the combustion chamber leaks from between the sliding surfaces of the piston (22) and the cylinder (22), which causes blow-by. Gas (BG) becomes crank chamber (5
As it begins to flow into 1), the internal pressure of the crank chamber (51) rises.

The oil in the crank chamber (51) is pushed downward by this blow-by gas pressure (Pb). Then, this oil flows from the communication passage inlet (62) opened in the vicinity of the center of the crank chamber oil receiving chamber (52) to the inter-chamber communication passage (61), the left and right gas separation chambers (66), and the left and right gas separation chambers. It passes through each oil hole (67) in order and flows into the outer storage chamber portion (53) of each of the left and right crank chamber outer oil storage chambers (58), and further from each oil communication hole (56a) to each inner storage chamber portion (55). Also flows into. As a result, the oil level (L1) of the crank chamber oil receiving chamber (52) is pushed down to the specified oil level (L0), and the oil level (L2) of each crank chamber outside oil storage chamber (58) is pushed up. .

[C] Exhaust of Air The air on the oil surface in each of the left and right crank chamber external oil storage chambers (58) is discharged from the air pushing passageway (74) along with the rise of the internal oil surface (L2).
Through the oil separator (76). The pushed air is further sucked into the combustion chamber through the breather pipe (77) and the intake passage.

That is, the air in the left inner storage chamber portion (55) is discharged from the ventilation elongated hole (56b) and also in the outer storage chamber portion (53).
The air inside the oil is separated from the long groove (72) through the oil separation chamber (70).
Through the oil separator (76).

On the other hand, the air in the right outer storage chamber portion (53) is supplied from the right ventilation slot (56b) to the right inner storage chamber portion (5).
5), and together with the air in the inner storage chamber portion (55), the descending starting end portion (73a) / transverse intermediate portion (7a) of the gas communication passage.
3b) -ascending terminal part (73c) -air layer space (55a) in the left inner storage chamber part-ventilation long hole (56b) on the left side-and oil separation chamber (70), and then through the oil separator (76 ).

[D] Derivation of blow-by gas Shortly after the engine (E) starts operating, the oil level (L1) in the crank chamber oil receiving chamber (52) is pushed down to the specified oil level (L0). As a result, the transfer of [B] oil by extrusion and the discharge of [C] air are completed, and the discharge of blow-by gas, which will be described next, begins. Derivation of the blow-by gas is continued until the engine (E) is stopped.

Oil level (L1) of the oil receiving chamber (52) in the crank chamber
When the oil level drops to the specified oil level (L0), the communication path inlet (62) of the inter-chamber communication path (61) opens on this oil level (L1). Crank chamber
The blow-by gas (BG) in (51) flows into the inter-chamber communication passage (61) from this open communication passage inlet (62), splits into the left and right breather outlet passages (75), and then merges the separated oil. vessel
Extruded to (76). Then, it is sucked into the combustion chamber from the oil separator (76) through the breather pipe (77) and the intake passage.

That is, the blow-by gas (BG) branched to the breather derivation path (75) on the left is the gas separation chamber (66) on the left.
The oil is separated from the oil, rises in the gas separation chamber (66) and flows from the separation gas outlet (68) into the air layer space (55a) of the left inner storage chamber portion (55). On the other hand, the breather derivation path (7
The blow-by gas (BG) that was split to 5) is the gas separation chamber on the right side.
It is separated from the oil at (66) in the same manner as on the left side, and the air layer space (55a) of the inner storage chamber portion (55) on the right side, the descending start end portion (73a) of the gas communication passage (73), and the transverse intermediate portion ( 73b) · Ascending end
After passing through (73c) in sequence, it flows into the air-layer space (55a) in the left side inner storage chamber, where it merges with the blow-by gas (BG) that has been split to the left. The blow-by gas (BG) thus merged flows into the oil separator (76) through the ventilation elongated hole (56b) and the oil separation chamber (70) in this order.

The oil mist in the blow-by gas (BG) is separated by the oil separation chamber (70) and the oil separator (76), and then passes through the slot (72) from the oil separation chamber (70). It is returned to the left outer storage chamber part (53).

[E] Reverse Flow of Oil into Crank Chamber When the engine (E) stops operating, the pressure in the crank chamber (51) gradually returns to atmospheric pressure. Due to this pressure decrease, the oil pushed into the oil chamber (58) outside the crank chamber flows back into the crank chamber (61) through the inter-chamber communication passageway (61). Then, the oil level (L
When 1) rises to the same level as the oil level (L2) in the oil chamber (58) outside the crank chamber, the reverse flow of oil stops. As a result, the state of the oil entering the crank chamber described in [A] above is restored.

Although the water-cooled vertical type diesel engine has been described in the above embodiments, the present invention can be applied to any type of engine such as a gasoline engine or a forced air cooling engine as long as the engine is provided with oil chambers outside the crankcase on the left and right sides of the engine. It can also be applied to engines.

Further, in the above embodiment, the gas communication passage is formed in the front ridge of the intermediate wall, but instead of this, it may be provided in the case wall such as the crankcase lower wall or front and rear walls, or as shown in FIG. Alternatively, it may be installed in the upper part of the crank chamber. Alternatively, as shown in FIG. 12, one end of the gas communication passage may be located above the crankcase lateral side wall, and the other end (73a) may be arranged vertically to the outer surface of the case lateral side wall. .

On the other hand, for the descending start end portion or the ascending end portion, instead of the gasket for partitioning the lateral outer surface, a lid plate having a width partitioning only between the front and rear vertical ribs may be used. The space between the ribs may be replaced by piping.

Further, the inter-chamber communication portion is provided on the intermediate wall of the crankcase, but instead of this, for example, as shown in FIG. 13, a communication hole may be simply opened on the side wall of the crankcase. Alternatively, a pipe for the communication portion may be provided inside or outside the crank chamber.

Further, as shown in FIG. 13, the crank chamber oil receiving chamber may be constructed by fixing the bottom plate (83) below the cylinder block (11).

In the above-mentioned embodiment, the side wall of the gas separation chamber is constructed by using the gasket for mounting the engine stand. However, instead of this gasket, the side wall of the front and rear vertical ribs has a width that defines only the rib. It may be configured using a lid plate,
Alternatively, the gas separation chamber can be provided in the crankcase.

The inter-room oil transfer means may be constructed by attaching an oil pump, or, for example, FIG.
As shown in FIG. 3, a transfer pressure setting relief valve may be attached to the head cover or the like to increase the blow-by gas pressure in the crank chamber, and the pressure may be increased.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a crank chamber oil accommodating device of an engine lubricating device according to an embodiment of the present invention, showing flows of oil and blow-by gas from a crank chamber oil receiving chamber to a crank chamber external oil accommodating chamber.

FIG. 2 is a perspective view of the entire engine.

FIG. 3 is a perspective view of an engine body.

FIG. 4 is a left side view of the engine body.

FIG. 5 is a right side view of a central longitudinal section of the engine body.

FIG. 6 is a vertical sectional front view of a central portion of a front cylinder of an engine body.

FIG. 7 is a vertical sectional front view of a gear case portion of the engine body.

8 is a vertical sectional front view of a cylinder block portion of the engine, FIG. 8 (A) is a sectional view taken along the line IA-IA of FIG. 5, and FIG. 8 (B) is a sectional view taken along the line IB-IB of FIG.

9 is an exploded perspective view of the IX portion in FIG. 8 (A).

FIG. 10 is a vertical sectional front view of a head cover portion of the engine.

FIG. 11 is a view corresponding to FIG. 8A, showing a modified example of the embodiment.

FIG. 12 is a view corresponding to FIG. 8B, showing another modification.

FIG. 13 is a view corresponding to FIG. 8A, showing another modification.

FIG. 14 is a view corresponding to FIG. 10, showing another modification.

FIG. 15 is a schematic vertical cross-sectional view of a crankcase oil storage device of an engine lubrication device, showing a conventional technique.

[Explanation of symbols]

Reference numeral 7 ... Crank case, 8 ... Case side wall, 51 ... Crank chamber, 52 ... Crank chamber oil receiving chamber, 58 ... Crank chamber outside oil storage chamber, 59 ... Gas phase space, 61 ... Inter-chamber communication part, 64 ... Vertical rib, 73 ... Gas communication passage, 76 ... Oil separator, E ... Engine, L1 ... Crank chamber oil receiving chamber oil level, L2 ... Crank chamber outside oil receiving chamber level, BG ... Blow-by gas,
P ... Oil transfer means between chambers, Pb ... Blow-by gas pressure.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiro Yamamoto 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. (72) Inventor Shoichi Yamamoto 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. (72) Inventor Akira Hayaya 64 Ishizukitamachi, Sakai City, Osaka Prefecture, Kubota Sakai Co., Ltd. (72) Inventor, Yutaka Watanabe 64 Ishizukitamachi, Sakai City, Osaka Prefecture, Kubota Sakai Co., Ltd.

Claims (4)

[Claims] 1. A crank chamber oil receiving chamber (52) is provided below a crank chamber (51) of an engine (E), and a crank chamber outside oil receiving chamber (58) is provided outside the crank chamber (51). 52) and the oil storage chamber (58) outside the crank chamber are communicated with each other through the inter-chamber communication portion (61), the engine (E) is provided with the inter-room oil transfer means (P), and the inter-room oil transfer means (P) is provided. ), The oil in the crank chamber oil receiving chamber (52) is transferred from the inter-chamber communication portion (61) to the crank chamber outside oil storage chamber (58), and the oil level in the crank chamber outside oil storage chamber (58) is increased. (L2) to the crank chamber oil receiving chamber (5
2) A crankcase oil storage device for an engine lubrication device configured to hold the oil level higher than the oil level (L1) in the crankcase outside oil storage chamber (58) on both left and right sides of the engine (E). Is installed to connect the gas phase spaces (59, 59) of the oil storage chambers (58, 58) outside the crank chambers to each other.
(73), and the blow-by gas outlet of one of the crankcase outside oil storage chambers (58) is connected to the oil separator (76), and the outside crankcase oil storage device of the engine lubrication device is characterized. . 2. The left and right crank chamber outside oil storage chambers (58)
・ 58) Gas phase space (59 ・ 59)
The crankcase oil storage device of the engine lubrication device according to claim 1, wherein the intermediate portion (73b) of (3) is formed by traversing the lower space of the crank chamber. 3. A pair of front and rear vertical ribs (64, 64) are projected laterally outward from at least one of the lateral side walls (8) of the left and right of the crankcase (7) of the engine (E). The gas communication path (7
The oil storage device outside the crank chamber of the engine lubrication device according to claim 1 or 2, wherein at least one of the left and right vertical road ends of (3) is formed. 4. The inter-room oil transfer means (P) is provided with an engine.
The configuration is made by utilizing the pressure (Pb) of blow-by gas (BG) generated in the crank chamber (51) with the operation of (E).
An oil storage device outside a crank chamber of the engine lubrication device according to claim 3.