JPH0350314A - Engine unit for vehicle - Google Patents

Abstract

PURPOSE:To prevent poor oil supply at the time of rapid acceleration and deceleration by partitioning an oil pan into two rooms, right and left, installing two discharge pumps, and opening hydraulic passages which are arranged in series to respective pumps in the oil pan at both the sides of a partitioning wall. CONSTITUTION:A crank shaft is jouralled between a cylinder block (not illustrated) and a bearing case connected in series to the lower surface of the cylinder block, and an oil pan 14 is connected in series to the lower surface of the bearing case, and a crank shaft is formed to gather oil by the said three components. An oil tank (not illustrated) is also connected to the oil pan 14, and they are partitioned by the walls which are provided with horizontal and vertical ribs 14b, 14c in the oil pan 14. Moreover, a partitioning wall 14d is installed approximately parallel to the driving direction of a vehicle on the bottom of the oil pan 14 to partition the inside of the oil pan 14 into two rooms A1, A2, and oil introducing parts 14e, 14f are formed adjacent to the partitioning wall 14d in the respective oil cases A1, A2 to arrange in series the suctions of the two discharge pumps (not illustrated).

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a vehicle engine unit, and more particularly to a vehicle engine unit using a dry sump lubrication system.

[Prior Art] In engine units mounted on vehicles, a wet sump method or a dry sump method is used to lubricate various parts of the engine.

In the wet sump system, the oil collected in the oil pan is sent directly to each part of the engine using an oil pump to lubricate each part. On the other hand, in the Trisanf system, the oil collected in the oil pan located below the crankshaft is sent to the oil tank by the drive of the discharge pump, and from this oil tank, the oil is supplied to each part of the engine by the oil supply pump. It lubricates each part of the

[Problems to be Solved by the Invention] By the way, when trying to use a dry sump system in an engine unit installed in a vehicle, the wet sump system has a deep oil pan and a large amount of oil in the oil pan, making it difficult to make sharp turns or make sudden changes. Even if the oil is shifted to one side of the oil pan during vehicle driving conditions such as acceleration or deceleration, the oil inlet will not come out above the oil surface, but with dry sump systems, the oil pan is generally shallow, so the oil inlet can be easily accessed. It comes out on the oil surface.

Therefore, when using the dry sump method, the discharge pump blows air, which causes the discharge pump to idle and become unable to suck in oil.This malfunction causes oil to not be sent to the oil tank, and even worse. There are problems such as oil not being supplied to various parts of the engine.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a vehicle engine unit that prevents a discharge pump from malfunctioning while the vehicle is in operation.

[Means for Solving the Problems] In order to solve the above problems, the invention according to claim 1 provides a system that sends oil accumulated in an oil pan provided below the crankshaft to an oil tank by driving a discharge pump, In a vehicle engine unit in which oil is supplied from the oil tank to each part of the engine for lubrication by an oil supply pump, the oil pan is provided with a partition wall in a direction substantially parallel to the vehicle traveling direction to divide the oil pan into two chambers; The two discharge pumps are provided independently, and oil passages communicating with the two discharge pumps are opened in the oil pan on both sides of the partition wall so as to be close to each other or remote from the partition wall. It is characterized by what it did.

Further, the invention as claimed in claim 2 is such that the oil accumulated in the oil pan provided below the crankshaft is sent to an oil tank by driving a discharge pump, and the oil is supplied from this oil tank to each part of the engine by an oil supply pump. In a vehicle engine unit for lubricating, the oil pan is provided with a partition wall in a direction substantially perpendicular to the vehicle traveling direction to divide the oil pan into two chambers, and the two discharge pumps are independently provided,
The oil passages communicating with the two discharge pumps are opened in the oil pan on both sides of the partition wall so as to be close to each other or remote from the partition wall.

[Function] In the invention set forth in claim 1, the oil in the oil pan may shift to one side due to vehicle driving conditions such as sudden turns or road surface conditions, and in the invention set forth in claim 2, due to vehicle driving conditions such as sudden acceleration/deceleration or road surface conditions. Even if the opening formed in the oil pan of the oil passage communicating with one of the two exhaust pumps comes out above the oil surface, the opening of the oil passage communicating with the other exhaust pump will not be exposed to the oil in the oil pan. Because of this, oil can be sucked from this discharge pump.

[Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

Fig. 1 is a side view showing a state in which the automobile engine unit of the present invention is mounted, Fig. 2 is a plan view thereof, Fig. 3 is a side view of the automobile engine unit, and Fig. 4 is a front view of the automobile engine unit. Figure 5 is a partially cutaway side view of an automobile engine unit, and Figure 6 is the Vl of Figure 5.
-Vl sectional view, Fig. 7 is a front view of the automobile engine unit, Fig. 8 is a ■-■ sectional view of Fig. 7, Fig. 9 is a sectional view of Fig. 7 IX-IX, and Fig. 10 is an oil It is a front view of bread.

In FIGS. 1 and 2, reference numeral 1 indicates an engine compartment of an automobile, and this engine compartment 1 is formed above and between left and right front wheels 3 connected by a front axle 2.

An engine unit 4 of a 4-stroke, 6-cylinder engine is mounted in this engine compartment 1, and a radio engine is mounted in front of the engine unit 4.

Eta 5 is arranged. By arranging the engine crankshaft 6 so as to face in the vehicle width direction, the vehicle interior is made wider.

A crankshaft 6 of the engine is pivotally supported between a cylinder block 7 and a bearing case 8, and is connected by a connecting rod 10 to a piston 9 provided in each cylinder. In addition,
A plate 90 having a protrusion 90a on the outer periphery is provided at the end of the crankshaft 6 protruding from the cylinder block 7, as shown by the two-dot chain line in FIGS. The sensor 91 can detect the passage of the protrusion 90a of the plate 90 and detect the phase of the crankshaft 6.

A cylinder head 11 is mounted on the cylinder block 7, and a heat shield cover 12 is provided on the cylinder head 11. Furthermore, a spark plug 13 is provided for each cylinder.

An oil pan 14 is attached to the bearing case 8, and an oil tank 15 is further connected to the oil pan 14, and the oil tank 15 is arranged in a raised position in front of the vehicle from the bottom to the top of the engine. .

The cylinder row of the engine is inclined toward the rear of the vehicle with respect to the vertical direction, and the output output shaft 1 takes out the output from the crankshaft 6.
6 is provided parallel to the crankshaft 6, and the output output shaft 16 is arranged diagonally above the crankshaft 6 and close to it. An oil tank 15 for storing oil is located diagonally below the output output shaft 16 and the crankshaft 6, so that the oil tank 15 faces toward the front of the vehicle as indicated by the arrow FWD in FIGS. 3 and 5. It looks like this.

Further, the angle α between the cylinder axis L1 and the line L2 connecting the output output shaft center and the crank shaft center is an acute angle.

Cylinder block 7, bearing case 8 and oil pan 14
Oil that lubricates various parts of the engine, such as the cylinder block 7, accumulates at the bottom of the crank chamber A formed by the engine. The oil pan 14 and the oil tank 15 are connected to the wall 1 of the oil pan 14.
4a, and ribs 14b and 14c are formed in the horizontal and vertical directions on the inside of this wall portion 14a, and a baffle plate 21 extends downward from the horizontal ribs 14b.
is attached with bolts 200. A slight gap is provided between the upper part of the baffle plate 21 and the horizontal rib 14b, and an opening 201 is formed in the lower part of the baffle plate 21, which faces the passage 8a of the bearing case 8 and is roughly connected to the baffle. A window portion 21a is formed in the plate 21. This allows oil to flow into the baffle plate 21, prevents oil accumulated at the bottom of the oil pan 14 from scattering as the crankshaft 6 rotates, and also prevents oil from scattering depending on the driving condition of the vehicle. I'm trying to keep the oil from shaking.

A partition wall 14d is provided at the bottom of the oil pan 14 in a direction substantially parallel to the vehicle traveling direction.
4 is divided into two oil chambers AI and A2. Oil introduction portions 14e and 14f are formed in the oil chambers AI and A2 adjacent to the partition wall 14d, and a mesh 20
a, 20b are attached with bolts 202, and this net 20a
, 20b function as a filter to remove dust from the oil.

Two discharge pumps 1B and 19 are independently provided on the output output shaft 16, and an oil supply pump 24 is also provided, and these are housed in a pump housing 203 attached to the cylinder block 7. 2 discharge pumps 1B, 1
The oil passages 204 and 205 that communicate with the oil pan 14 are located on both sides of the partition wall 14d of the oil pan 14, and are connected to the partition wall 14d.
4 (formed so as to be close to each other with respect to 1, and the suction ports 204a and 205a thereof open to the oil introduction portions 14e and 14f in the oil pan 14.Oil passage 204
, 205 is connected to the communication passage 2 formed in the oil pan 14.
04b, 205b to the suction sides 18a, 19a of the discharge pumps 18, 19. The discharge sides 18b and 19b of each of the discharge pumps 18 and 19 are provided to face a communication passage 14g formed in the oil pan 14, and the oil is combined in the communication passage 14g and formed in the oil pan 14. The oil is sent to the oil tank 15 through the through hole 14i.

Therefore, depending on the road surface condition, the vehicle may tilt in the vehicle width direction, or the oil accumulated in the oil pan 14 may shift to one side of the oil pan 14 when turning or the like. For example, in FIG. When the rotation causes the oil to shift to the right side, and in one oil chamber A2, the oil level on the partition wall 14d side drops below the suction port 2058 of the oil passage 205, the discharge pump 19 communicating with this oil passage 205 sucks air. It becomes like this. For this reason, this discharge pump 19 idles and becomes inoperable, but in the other oil chamber A1, oil accumulates on the partition wall 14d side, and the suction port of one oil passage 204 provided close to the partition wall 14d. Since the oil level does not drop below 204a, this oil passage 204
A discharge pump 18 connected to the drain pump 18 is operated, and oil can be sent to the oil tank 15. As a result, sufficient oil can be supplied from the oil tank 15 to each part of the engine, and oil is prevented from accumulating excessively in the oil pan 14, and the rotation of the crankshaft 6 moves the oil around, reducing horsepower loss. In this embodiment, the oil passages 204 and 205 are formed close to each other on the partition wall 14d of the oil pan 14.
The oil suction ports 204a, 205a of No. 4, 205 may be opened into the oil pan 14 so as to be remote from each other. In this case as well, if the oil shifts to the right side due to vehicle driving conditions such as sharp turns or road surface conditions, the oil will flow to one of the two exhaust pumps 18' and 19, contrary to the above. Oil inlet 20 of communicating oil passage 204
4a may come out above the oil surface, but the oil inlet 205a of the oil passage 205 is in the oil, and the discharge pump 1
Oil can be sucked in by operating step 9.

Further, the positions where the oil passages 204 and 205 open into the oil pan 14 so as to be close to each other or far from each other with respect to the partition wall 14d are such that even if one discharge pump becomes inoperable due to air intake, the other There is no particular limitation as long as the discharge pump is in a position where it does not suck air.

A strainer 25 is disposed at the bottom of the oil tank 15, and the strainer 25 is attached to the wall of the oil pan 14 via a bracket 206 with bolts 207. A vibrator 26 connected to this strainer 25 is attached with a bolt 209 in line with a communication passage 208 formed in the oil pan 14, and is configured to guide oil from the oil tank 15 from the communication passage 208 to the suction side 24a of the oil supply pump 24. ing.

The discharge side 24b of the oil supply pump 24 is connected to the pump housing 20
The communication path 211 is connected to the communication path 211 formed in the communication path 2.
Oil is supplied from the oil cooler 22 and the oil filter 23 from the oil pan 11 through a communication passage 212 formed in the oil pan 14 . In addition, there is a branch path 2 in the middle of the communication path 211.
11a is connected, and this branch path 211a is provided with a relief valve 210 as shown in FIG. The relief valve 210 opens when the pressure in the communication passage 211 exceeds a certain level, and the oil is returned to the oil tank 15 through the through hole 14i.

Known oil coolers 22 and oil filters 23 are used, and are attached to the mounting portion 14h of the oil pan 14 to cool the oil to a predetermined temperature. This cooled oil flows through an oil passage 213 formed in the oil pan 14 and an oil passage 213 formed in the bearing case 8.
4 to an oil passage 215 formed in the cylinder block 7.

The oil passage 215 of the cylinder block 7 is supplied to each shaft portion of the crankshaft 6 via a communication passage 217 from an oil passage 216 formed in the direction of the crankshaft. Also, from the oil passage 218 of the cylinder block 7 to the cylinder head 1
1 oil passage 219, and further oil passage 2
It is supplied to the shaft portion of the intermediate shaft 31 and the shaft portion of the camshaft 37 via 20 and 221. Oil from each shaft portion of these cylinder heads 11 is led to the bearing case 8 through an oil passage 222 and an oil passage 223 formed in the cylinder block 7, and is collected in the oil pan 14. Discharge pump 18.1 from this oil pan 14
The arrows indicate the flow of oil that is sent to the oil tank 15 by the operation of 9, and from this oil tank 15 that lubricates various parts of the engine by the operation of the oil supply pump 24 and returns to the oil pan 14.

An oil inlet 15a is provided at the top of the oil tank 15 and is closed with a cap 27. Further, partition walls 224 to 226 are provided in the upper part of the oil tank 15, and window portions 224a to 224 of the partition walls 224 to 226 are
A breather portion 227 is provided to form a labyrinth. A connecting pipe 228 is attached to this breather portion 227, and is connected to the intake pipe 41 via piping (not shown) to send air from which oil has been separated from the breather gas to the intake pipe 41. The upper surface of the oil tank 15 where the oil inlet 15a is provided is substantially horizontal.

A gear 28 provided on the crankshaft 6 meshes with a gear 29 provided on the output extraction shaft 16, and furthermore, the output extraction shaft 16
A gear 30 provided in the cylinder head 11 is connected to a gear 32 of an intermediate shaft 31 pivotally supported by the cylinder head 11 via a first chain 33. Furthermore, the gear 3 provided on the intermediate shaft 31
4 is connected to a gear 38 of a camshaft 37 of a valve mechanism 36 via a second chain 35, and the camshaft 37 is rotated by rotation of the crankshaft 6.

This rotation of the camshaft 37 causes the cam 39 to rotate, opening and closing an intake valve and an exhaust valve (not shown) at predetermined valve timing.

An exhaust pipe 40 and an intake pipe 41 are connected to each cylinder row in the cylinder head 11, and each intake pipe 41 is connected to a surge tank 42.
2 is arranged to extend in the vehicle width direction, and is supported by the cylinder block 7 by a stay 43. A throttle valve 44 is provided on the air inlet side of the surge tank 42 .

As shown in FIG. 1, a flywheel 45 and a clutch mechanism (not shown) are provided at one end of the output shaft 16.
Power is transmitted to the front axle 2 of the front wheels 3 via the transmission 47. Further, the primary side of the transmission 47 is arranged on the output output shaft 16, and the secondary side is arranged on the counter shaft 48, and rotates the front axle 2 via a gear 49 provided on the axle 2.

Furthermore, an accessory drive pulley 50 is provided at the other end of the output output shaft 16 as shown in FIGS. 3 and 6, and this accessory drive pulley 50 is provided at the end of the cylinder block 7. It is provided at a position opposite to a bearing 60 of the crankshaft 6 and a bearing (not shown) of the crankshaft 6 provided in the bearing case 8. This bearing 60 has a pulley 5 for driving auxiliary equipment.
A recess 51 is formed at a position facing 0, and an auxiliary drive pulley 50 is disposed facing inside this recess 51.

A belt 55 is passed from the auxiliary drive pulley 50 to the pulleys of auxiliary machines such as alternators 52, 6, power steering pump 53, and air conditioner compressor 54, so that the rotation of the output shaft 16 drives these simultaneously. ing. The tension of this belt 55 is adjusted by the idler 92.
It is carried out by

In addition, a water outlet lower a and a water inlet lower b are formed in front of the cylinder block 7 toward the front of the vehicle, and cooling water is supplied from the water outlet lower a to the radiator 5.
Cooling water from the radiator 5 is sent to the water pump through the water lower b.

Note that a partition wall is provided in the oil pan 14 in a direction substantially perpendicular to the vehicle traveling direction to divide the oil pan 14 into two chambers, and two discharge pumps 18 and 19 are independently provided to separate the two discharge pumps. The oil passages communicating with the pumps 18, 19, respectively, can open into the oil pan on both sides of the compartment wall, either close to each other or remote from each other with respect to the compartment wall. In this case, even if the oil in the oil pan 14 is shifted to one side in the direction of travel of the vehicle due to sudden acceleration or deceleration of the vehicle or due to vehicle driving conditions such as road surface conditions, the two exhaust pumps 18 and 19 Even if the oil suction port of the oil passage communicating with one of the discharge pumps is exposed above the oil surface, oil can be sucked from the other discharge pump.

[Effects of the Invention] As described above, in the invention set forth in claim 1, when the vehicle is driven due to sudden turns or road surface conditions, and in the invention set forth in claim 2, the , even if the oil in the oil pan is biased to one side and the opening of the oil passage communicating with one of the two exhaust pumps appears above the oil surface, the oil passage communicating with the other exhaust pump will not open. The opening is located in the oil, and the oil can be sucked in by operating the discharge pump.

Therefore, the discharge pump that sends oil from the oil pan to the oil tank will not malfunction depending on the driving condition of the vehicle, and sufficient oil can be supplied from the oil tank to each part of the engine, and the oil level of the oil accumulated in the oil pan can be reduced. It is possible to reduce the loss of horsepower caused by the crankshaft stirring the oil by increasing the torque to above a predetermined value.

[Brief explanation of drawings]

Fig. 1 is a side view showing a state in which the automobile engine unit of the present invention is mounted, Fig. 2 is a plan view thereof, Fig. 3 is a side view of the automobile engine unit, and Fig. 4 is a front view of the automobile engine unit. 5 is a side view of the automobile engine unit, FIG. 6 is a sectional view taken along line Vl-Vl in FIG. 5, FIG. 7 is a partially cutaway front view of the automobile engine unit, and FIG. ■-■ cross-sectional view of Figure 7, Figure 9 is the 7th
D[-1 in the figure is a sectional view, and FIG. 10 is a front view of the oil pan. In the figure, 1 is an engine room, 6 is a crankshaft, 7 is a cylinder block, 8 is a bearing case, 14 is an oil pan, 14
d is a partition wall, 15 is an oil tank, 16 is an output extraction shaft,
18. 19 is a discharge pump, 24 is a refueling pump, 204,
205 is an oil passage, and AI and A2 are oil chambers. 0

Claims (1)

[Claims] 1. Oil collected in an oil pan provided below the crankshaft is sent to an oil tank by driving a discharge pump, and from this oil tank an oil supply pump supplies oil to various parts of the engine for lubrication. In the vehicle engine unit, the oil pan is provided with a partition wall in a direction substantially parallel to the vehicle traveling direction to divide the oil pan into two chambers, and the two exhaust pumps are independently provided, and the two exhaust pumps are separated. 1. A vehicle engine unit characterized in that oil passages communicating with each other are opened in an oil pan on both sides of a partition wall so as to be close to each other or far from each other. 2. In a vehicle engine unit in which oil collected in an oil pan provided below the crankshaft is sent to an oil tank by driving a discharge pump, and oil is supplied from this oil tank to each part of the engine by an oil supply pump for lubrication. A partition wall is provided in the oil pan in a direction substantially perpendicular to the vehicle traveling direction to divide the oil pan into two chambers, and two discharge pumps are provided independently, and an oil passage communicates with each of the two discharge pumps. are opened into an oil pan on both sides of a partition wall so as to be close to each other or remote from each other with respect to the partition wall.