JP3211347B2 - Oil pump mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump mounting structure, and more particularly to an oil pump mounting structure capable of increasing an oil storage amount without changing the shape and structure of an oil pan, and being advantageous in terms of cost. And an oil pump mounting structure capable of increasing the capacity of an oil filter.

[0002]

2. Description of the Related Art In an internal combustion engine mounted on a vehicle, oil is circulated by an oil pump for lubrication and cooling of various parts of the engine. The oil is stored in an oil pan below the internal combustion engine, is fed by an oil pump driven by the internal combustion engine, is supplied to various parts of the engine, performs lubrication and cooling, and is returned to the oil pan.

The mounting structure of such an oil pump is disclosed in Japanese Utility Model Laid-Open No. 2-1407 and Japanese Utility Model Laid-Open No. 2-13100.
There is one disclosed in JP-A-7. In these publications, an oil pump driven by a crankshaft is provided in an oil pan below an internal combustion engine.

[0004] Some vehicles have an internal combustion engine mounted vertically in an engine room, and others have a vehicle mounted horizontally. Some internal combustion engines mounted laterally in the engine room of the vehicle are mounted to be inclined to one of the front and rear sides. As shown in FIG. 2 and FIG. 3, there is an internal combustion engine that is placed laterally in the engine room of a vehicle and mounted to be inclined to one of the front and rear sides.

In FIG. 1, reference numeral 102 denotes a vehicle, 104 denotes a hood panel, 106 denotes an engine room, and 108 denotes an internal combustion engine.
The internal combustion engine 108 is placed laterally and mounted at an angle to one of the front and rear sides in an engine room 106 covered by a hood panel 104 of the vehicle 102. That is, the internal combustion engine 10
Numeral 8 is mounted such that the crank axis C1, which is the horizontal axis, is directed in the width direction of the vehicle 102, and the vertical axis C2 is inclined forward by the angle α with respect to the vertical line CV.

The internal combustion engine 108 has first and second cylinder heads 112 and 114 mounted on an upper portion of a V-shaped cylinder block 110, and a crankcase 116 mounted on a lower portion of the cylinder block 110. I have. At the bottom of this crankcase 116,
An oil pan 118 is attached and provided.

[0007] An oil pump 120 is provided below the crankcase 116 in the oil pan 118 by being mounted with pump mounting bolts (not shown). In addition,
Reference numeral 122 denotes an oil filter. The oil filter 122 is provided at a lower portion of the crankcase 116 with filter mounting bolts (not shown).

The cylinder block 110 is provided with a crankshaft 124 pivotally supported by a crankcase 116. A timing sprocket 126 is attached to one end of the crank shaft 124 in the axial direction, and a pump sprocket 128 is attached to the inside of the timing sprocket 126.

The first and second cylinder heads 112 ・ 1
14 is provided with first intake and exhaust camshafts 130 and 132 and second intake and exhaust camshafts 134 and 136, respectively. First camshaft 130-1 for intake and exhaust
The first camshaft sprockets 138 and 140 for intake and exhaust are attached to one end of the shaft 32 at one end in the axial direction. The intake and exhaust second camshafts 134 and 136 are provided with intake and exhaust second camshaft sprockets 142 and 144, respectively, attached to the other axial end.

The first cylinder head 112 has first intake / exhaust first camshafts 130 and 132 and crankshaft 12
4 and an intermediate shaft 146 at one end in the axial direction.
Is provided. The intermediate shaft 146 has an intermediate shaft one-side sprocket 148 and an intermediate shaft other-side sprocket 1
50 is provided so as to be pivotally supported. In addition, an intermediate second sprocket 152 is provided at one axial end of the intake second camshaft 134. The cylinder block 110 includes first and second cylinder heads 112 and 114.
An idle shaft 154 is mounted at one end in the axial direction so as to be located between the idle shaft 154 and the idle shaft sprocket 156.

A timing chain 158 is wound around the timing sprocket 126, the intermediate shaft one-side sprocket 148, the idle shaft sprocket 156, and the intermediate second sprocket 152. A first camshaft chain 160 is wound around the intake / exhaust first camshaft sprockets 138 and 140 and the intermediate shaft other-side sprocket 150. Second for intake / exhaust
The second camshaft chain 162 is wound around the camshaft sprockets 142 and 144.

The pump shaft 164 of the oil pump 120 is provided with a pump shaft sprocket 166 attached thereto. A pump chain 168 is wound around the pump sprocket 128 and the pump shaft sprocket 166. Reference numeral 170 denotes a timing tensioner, and reference numerals 172 and 174 denote a first tensioner and a second tensioner, respectively.

Thus, the oil pump 120 includes the pump sprocket 128 and the pump shaft sprocket 166.
The rotation of the crankshaft 124 is transmitted by the pump chain 168 wound around the
The oil stored in 8 is supplied to various parts of the engine via an oil filter 122 to perform lubrication and cooling.

[0014]

FIGS. 2 and 3
In the mounting structure of the oil pump 120 shown in (1), the oil pump 120 is mounted below the crankcase 116 in the oil pan 118. Thus, the oil level L has the height indicated by the broken line. The oil level L1 has a height that does not reach the lowermost ends P of the pump shaft sprocket 166 and the pump chain 168.

This is because when the oil level L1 reaches the lowermost ends P of the pump shaft sprocket 166 and the pump chain 168, the oil is swept up by the pump shaft sprocket 166 and the pump chain 168 and air is entrained. It is because it causes.

For this reason, the oil stored in the oil pan 118 has the oil level L1 of the pump shaft sprocket 1
66 and the height of the pump chain 168 that is not reached the lowermost end P, which causes a problem that a necessary oil storage amount cannot be secured.

To solve such a problem, the oil pan 11
The required amount can be secured by changing the shape and structure of the height and width 8 of the internal combustion engine 8, but there is a disadvantage that it is disadvantageous in terms of cost and a disadvantage that the size of the internal combustion engine 108 is increased. In addition, the oil filter 122 connected to the oil pump 120 also has a disadvantage that its capacity is restricted by being mounted at a lower position.

[0018]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to an internal combustion engine that is mounted horizontally on an engine room of a vehicle and mounted to be inclined downward to the front of the vehicle in order to eliminate the above-mentioned disadvantages. The engine includes a crankcase that supports a crankshaft and an oil pan attached to a lower portion of the crankcase, and a lower portion of the crankcase is disposed to be inclined downward toward the vehicle front side in accordance with the inclination of the internal combustion engine, An oil pump is attached to the lower portion of the crankcase in the oil pan adjacent to the rear wall portion of the oil pan, and an oil filter is provided adjacent to the rear wall portion of the oil pan and a lower portion of the crankcase outside the oil pan. It is characterized by being attached and provided.

[0019]

According to the structure of the present invention, the lower part of the crankcase is inclined downward to the front of the vehicle in accordance with the inclination of the internal combustion engine which is placed laterally in the engine room of the vehicle and inclined downward to the front of the vehicle. The oil pump is mounted on the lower part of the crankcase inside the oil pan, adjacent to the rear wall of the oil pan, and mounted on the lower part of the crankcase outside the oil pan adjacent to the rear wall of the oil pan. The oil pump is mounted at the uppermost position in the oil pan below the crankcase that rises and leans to the rear of the vehicle, and the outermost oil pan below the oil pan below the crankcase that rises and leans to the rear of the vehicle. An oil filter is installed in the upper position, and the oil pump can be installed sufficiently far away from the oil level of the oil stored in the oil pan. With wear, it can be attached by positioning the oil filter to be contacted to the oil pump upwardly.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, 2 is a vehicle, 4 is a hood panel, 6 is an engine room, and 8 is an internal combustion engine. The internal combustion engine 8 is mounted horizontally on the engine room 6 of the vehicle 2 covered with the hood panel 4 and inclined at one of the front and rear sides. That is, the internal combustion engine 8 directs the crank axis C1, which is the horizontal axis, in the width direction of the vehicle 2, and sets the vertical axis C2 to the vertical line CV.
Is mounted to be inclined downward by an angle α toward the front side.

The internal combustion engine 8 has first and second cylinder heads 12 on top of a V-shaped cylinder block 10, respectively.
・ 14 is attached and provided, and the cylinder block 1
The crankcase 16 is attached to the lower part 10a of the "0". An oil pan 18 is attached to a lower portion 16 a of the crankcase 16.

The lower portion 16a of the crankcase 16 in the oil pan 18 has a rear wall 18
The oil pump 20 is mounted adjacent to a by a pump mounting bolt (not shown). Note that reference numeral 2
2 is an oil filter. The oil filter 22
The oil pan 18 is attached to a lower portion 16a of the crankcase 16 outside the oil pan 18 by a filter mounting bolt (not shown) so as to be adjacent to the rear wall portion 18a.

The cylinder block 10 is provided with a crankshaft 24 supported by a crankcase 16. A timing sprocket 26 is mounted and provided on one end of the crankshaft 24 in the axial direction, and a pump sprocket 28 is mounted and provided coaxially inside the timing sprocket 26.

The first and second cylinder heads 12 and 14
The first camshafts 30 and 32 for intake and exhaust and the second camshafts 34 and 36 for intake and exhaust are respectively provided so as to be pivotally supported. The first intake / exhaust camshafts 30/32 are provided with first intake / exhaust first camshaft sprockets 38/40 attached to one axial end thereof, respectively. Second for intake and exhaust
Each of the camshafts 34 and 36 has an intake /
The second exhaust camshaft sprockets 42 and 44 are attached and provided.

The first cylinder head 12 is provided between the first intake / exhaust first camshafts 30 and 32 and the crankshaft 24 with an intermediate shaft 46 attached to one end in the axial direction. . The intermediate shaft 46 is provided with a sprocket 48 on one side of the intermediate shaft and a sprocket 50 on the other side of the intermediate shaft. An intermediate second sprocket 52 is provided at one axial end of the intake second camshaft 34. The cylinder block 10 includes first and second
An idle shaft 54 is mounted and provided at one end in the axial direction between the cylinder heads 12 and 14.
4 is provided with an idle shaft sprocket 56 pivotally supported.

The timing sprocket 26, the intermediate shaft one side sprocket 48, and the idle shaft sprocket 56
A timing chain 58 is wound around and the second intermediate sprocket 52. A first camshaft chain 60 is wound around the intake / exhaust first camshaft sprockets 38 and 40 and the other intermediate sprocket 50. A second camshaft chain 62 is wound around the intake and exhaust second camshaft sprockets 42 and 44.

The pump shaft 6 of the oil pump 20
4 is provided with a pump shaft sprocket 66 attached thereto. A pump chain 68 is wound around the pump sprocket 28 and the pump shaft sprocket 66. Reference numeral 70 denotes a timing tensioner, and reference numeral 7 denotes a timing tensioner.
2 and 74 are a first tensioner and a second tensioner, respectively.

Thus, the oil pump 20 is driven by the rotation of the crankshaft 24 being transmitted by the pump chain 68 wound around the pump sprocket 28 and the pump shaft sprocket 66, and the oil stored in the oil pan 18. Is supplied to each part of the engine via the oil filter 22 to perform lubrication and cooling.

As described above, the internal combustion engine 8 is mounted on the lower part 10a of the cylinder block 10 in such a manner that the internal combustion engine 8 is mounted laterally in the engine room 6 of the vehicle 2 and mounted to be inclined downward toward the front of the vehicle. A crankcase 16 that supports a crankshaft 24 and an oil pan 18 attached to a lower portion 16a of the crankcase 16 are provided. The lower portion 16a of the crankcase 16 is inclined downward toward the front of the vehicle in accordance with the inclination of the internal combustion engine 8. The oil pump 20 is mounted on the lower portion 16a of the crankcase 16 in the oil pan 18 so as to be adjacent to the rear wall portion 18b of the oil pan 18. That is, the oil pump 20 is deflected to the left end in FIG. 1, and the lower portion 16 a of the crankcase 16 that is inclined upward toward the rear of the vehicle in accordance with the inclination of the internal combustion engine 8.
It is provided at the uppermost position in the oil pan 18.

In addition to the fact that the oil pump 20 is mounted adjacent to the rear wall portion 18b of the oil pan 18 on the lower portion 16a of the crankcase 16 which rises and inclines toward the rear side of the vehicle in the oil pan 18, A rear wall portion 18b of an oil pan 18 is provided on a lower portion 16a of the crankcase 16 which is inclined upward toward the rear of the vehicle in accordance with the inclination of the internal combustion engine 8.
The oil filter 22 is attached and provided adjacent to. That is, the oil filter 22 is biased toward the left end in FIG. 1 and is located at the uppermost position outside the oil pan 18 of the lower portion 16 a of the crankcase 16 that is inclined upward toward the rear of the vehicle in accordance with the inclination of the internal combustion engine 8. Mounted and provided.

As described above, the lower portion 16a of the crankcase 16, which rises and leans toward the rear of the vehicle when the internal combustion engine 8 is tilted forward, is adjacent to the rear wall portion 18b of the oil pan 18; Parallel and almost horizontal oil pan 18
The oil pump 20 is mounted at the uppermost position of the lower portion 16a of the crankcase 16 in the oil pan 18 farthest from the bottom 18a of the oil pump 20.
Can be mounted sufficiently spaced upward from the oil stored in the oil pan 18, and the lowermost ends P of the pump shaft sprocket 66 and the pump chain 68 can be separated to a height that does not reach the oil. An oil filter 22 connected to an oil pump 20 has a lower portion 16 of the crankcase 16 which is inclined upward and rearward toward the vehicle.
a, adjacent to the rear wall portion 18b of the oil pan 18, that is, the bottom 1 of the oil pan 18 which is substantially parallel to the ground surface.
The oil filter 22 is attached to the uppermost position of the lower portion 16a of the crankcase 16 outside the oil pan 18 farthest from the oil pan 8a.
It can be mounted at a height h above 8a.

Therefore, it is possible to solve the problem that the oil stored in the oil pan 18 is regulated to the oil level L1 shown in the conventional broken line without causing aeration in which the oil is scraped up and entrained air. , The oil level L2 shown by the solid line can be increased, the amount of oil storage can be increased, and the required amount of oil storage can be ensured.

As a result, the oil storage amount can be increased without changing the shape and structure of the oil pan 20.
Since the shape and structure of the oil pan 20 are not required to be changed, the oil pan 22 can be implemented advantageously in terms of cost, and since the mounting position of the oil filter 22 is higher, the capacity (filtration area) of the oil filter 22 is increased. Can be done.
As a result, lubrication of the internal combustion engine 8 by the oil pump 20
The cooling capacity can be improved.

[0035]

As described above in detail, according to the present invention, the oil pump is mounted at the uppermost position in the oil pan at the lower part of the crankcase which rises and leans toward the rear side of the vehicle in accordance with the inclination of the internal combustion engine. An oil filter is installed at the uppermost position outside the oil pan below the crankcase that rises and leans toward the rear of the vehicle, and the oil pump can be installed sufficiently far away from the oil stored in the oil pan. The oil filter connected to the oil pump can be mounted so as to be positioned upward.

For this reason, the problem that the oil stored in the oil pan is regulated to the conventional oil level can be solved without increasing the aeration in which the oil is scraped up and entrained air, and the oil level can be increased. The oil storage amount can be increased, and the required oil storage amount can be secured.

As a result, the amount of oil stored can be increased without changing the shape or structure of the oil pan, and the oil pan can be advantageously implemented in terms of cost by not changing the shape or structure of the oil pan. In addition, the capacity of the oil filter can be increased by mounting the oil filter upward. As a result, the lubrication / cooling ability of the internal combustion engine by the oil pump can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an internal combustion engine implementing an oil pump mounting structure according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of an internal combustion engine implementing an oil pump mounting structure showing a conventional example.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

[Explanation of symbols]

 2 vehicle 6 engine room 8 internal combustion engine 10 cylinder block 12 first cylinder head 14 second cylinder head 16 crankcase 18 oil pan 20 oil pump 22 oil filter

Claims (1)

(57) [Claims] 1. An internal combustion engine mounted laterally in the engine room of a vehicle and mounted to be inclined downward toward the front of the vehicle. The internal combustion engine includes a crankcase that supports a crankshaft and a lower part of the crankcase. An oil pan to be mounted, wherein a lower portion of the crankcase is disposed to be inclined downward toward the front of the vehicle in accordance with a tilt of the internal combustion engine, and an oil pump is provided at a lower portion of the crankcase in the oil pan. This oil pan is installed next to the rear side wall.
The crankcase outside the oil pan adjacent to the rear wall
An oil pump mounting structure , wherein an oil filter is mounted at a lower portion of a base .