JPH11125105A - Supply structure of lubricating oil for engine accessory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take out a lubricating oil to outside an engine by an oil passage for accessories even without providing a separate pipe, eliminate a constitution complicated so as to facilitate manufacture, to reduce a cost, attain the simplification of the oil passage for accessories, and increase the freedom degree of a layout of engine accessories, even in the engine formed with an oil gallery almost in the center location of the engine. SOLUTION: In a lubricating oil supply structure formed with an oil gallery almost in the center location of a cylinder block of an engine and to forcedly feed lubricating oil to the oil gallery by an oil pump, a chain cover 22 covering one surface of the engine is provided, an oil passage 26 guiding lubricating oil from the oil pump to the oil gallery is provided inside the chain cover 22, and in the halfway of the oil passage 26, an accessory use oil passage 30 branching therefrom to lubricate an engine accessory is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil supply structure for an engine accessory, and more particularly to an oil passage for an accessory which is branched from an oil passage in an oil passage and lubricates the engine accessory. The present invention relates to a lubricating oil supply structure for an engine having an oil gallery formed therein and having an auxiliary machine that needs to be lubricated around the outside of the engine.

[0002]

2. Description of the Related Art Motorcycles, outboard motors, and vehicle engines have cylinders arranged in series,
There are ones in which cylinders are arranged to face each other, and a V-type engine in which each cylinder bank is arranged in a V-shape.

[0003] The V-type engine is constructed by mounting first and second cylinder heads on first and second cylinder banks of a cylinder block. The first and second cylinder heads are provided with first and second cylinder head covers.

A crankshaft extending in the longitudinal direction of the engine is rotatably provided substantially at the center of the cylinder block. Auxiliary devices such as a camshaft of a valve train and a water pump are driven by the crankshaft.

[0005] The lubricating oil supply structure for the engine accessory is disclosed in Japanese Utility Model Laid-Open No. 3-51110. In the V-type engine disclosed in this publication, each cylinder of the left and right banks is disposed with a predetermined offset amount in the crankshaft direction, and a main gallery is disposed between the left and right banks and distributes lubricating oil to each part of the engine. A V-type engine provided with a front case joined to a front wall of a cylinder block, and a sprocket and a chain for transmitting rotational force from a crankshaft to an oil pump drive shaft are interposed in the front case, and one end of the front case is provided. A pump mounting seat that protrudes to the side of the cylinder block of the bank offset to the rear of the engine is formed.The oil pump housing is arranged in parallel with the side of the cylinder block via the pump mounting seat, and the oil pump and the main An oil passage communicating with the gallery is integrally formed.

[0006] Japanese Unexamined Utility Model Application Publication No. 5-47390 discloses a technique. In the engine oil supply hole structure disclosed in this publication, an oil passage communicating the oil main gallery and the idler gear bearing in the engine is provided in the timing gear case or the flywheel housing, without reducing the strength and rigidity of the crankcase. The oil passage has an oil passage whose cross-sectional area is not restricted.

[0007]

By the way, in the conventional lubricating oil supply structure for an engine auxiliary machine, a main gallery (hereinafter referred to as an "oil gallery") 124 is provided in the supercharged engine 102 as shown in FIG. Are provided on the side of the cylinder block 104, that is, on the right side of FIG. The oil gallery 124 supplies lubricating oil pumped by an oil pump (not shown) to a portion to be lubricated.

Then, as shown in FIG. 10, an oil supply hole 134 communicating with a substantially central portion of the oil gallery 124 is provided.
Is formed in the cylinder block 104, and lubricating oil is supplied to a supercharger (not shown) through the oil supply hole portion 134.
Lubricating the turbocharger.

However, in the V-type engine 202, for example, as shown in FIG. 11, the oil gallery 224 may be located substantially at the center of the cylinder block 204, and the supply of the lubricating oil from the side of the cylinder block 204 It becomes difficult on processing or layout.

When the oil gallery 224 is located substantially at the center of the cylinder block 204, another pipe (not shown) is provided in the oil gallery 224, and the lubricating oil in the oil gallery 224 is provided by the separate pipe. Need to be taken out.

As a result, in an engine in which the oil gallery is located substantially at the center of the cylinder block, the construction is complicated due to the necessity of separate piping, which is difficult to manufacture, increases the cost, and is economically disadvantageous. With
A separate piping installation process is required, and the mounting workability deteriorates.
There is a disadvantage that it is practically disadvantageous.

[0012]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an oil gallery at a substantially central portion of a cylinder block of an engine in order to eliminate the above-mentioned disadvantages.
In the lubricating oil supply structure for supplying lubricating oil to the oil gallery by an oil pump, a chain cover is provided to cover one surface of the engine, and an oil passage for guiding the lubricating oil from the oil pump to the oil gallery is provided inside the chain cover. Along with the oil passage, there is provided an auxiliary oil passage for branching from the oil passage and lubricating the engine auxiliary equipment.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION
Even if the engine has an oil gallery in the center of the engine, it can be lubricated to the outside of the engine by the auxiliary oil passage provided in the oil passage of the chain cover, without having to provide a separate pipe directly connected to the oil gallery. Oil is being removed.

[0014]

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

1 to 8 show an embodiment of the present invention. 2 to 4, reference numeral 2 denotes an engine, for example, V
The engine 4 is a cylinder block, 6-1 and 6-2 are first and second cylinder heads, and 8-1 and 8-2 are first and second cylinder banks.

In the V-type engine 2, first and second cylinder heads 6-1 and 6-2 are mounted on a cylinder block 4, and the first and second cylinder banks 8-1 and 8- are formed in a substantially V shape.
2 are arranged.

The cylinder block 4 is provided with one crankshaft 12 in the longitudinal direction by a bearing cap 10.
And an oil pan 14 is attached to the lower part. The cylinder block 4 is provided with first and second cylinders (not shown), and first and second pistons (not shown) are mounted respectively. The first and second pistons are connected to the crankshaft 12 by first and second connecting parts (not shown).

Further, two first camshafts (not shown) for the intake valve and the first camshaft for the exhaust valve are provided in the first head cover 16-1 of the first cylinder head 6-1. In the second head cover 16-2 of the second cylinder head 6-2, two intake valve second camshafts and two exhaust valve second camshafts (not shown) are provided, respectively.

The first and second cylinder heads 6
The first and second intake valve camshafts are located on the side of the space 18 sandwiched between -1 and 6-2.

Further, the driving force from the crankshaft 12 is supplied to the first and second camshafts for the intake valve, the first and second camshafts for the exhaust valve, and the oil pump 20 disposed in the oil pan 14. , And a plurality of timing chains (not shown) for transmitting the timing chains are covered with a timing chain cover (hereinafter referred to as “chain cover”) 22. That is, the chain cover 22 covers the front part, which is one surface of the V-type engine 2.

An oil gallery 24 is formed substantially at the center of the V-type engine 2 and above the crankshaft 12, as shown in FIG. This oil gallery 24
Supplies the lubricating oil pumped by the oil pump 20 to the lubricated part to lubricate the lubricated part.

An oil passage 26 for guiding the lubricating oil from the oil pump 20 to the oil gallery 24 is provided inside the chain cover 22. The oil passage 26 is branched from the oil passage 26 in the middle of the oil passage 26, and an engine accessory, for example, An auxiliary oil passage 30 for lubricating the supercharger 28 is provided.

More specifically, the oil passage 26 is provided in the position shown in FIG.
As shown in FIG. 2, a first oil passage 26-1 formed in a vertical state communicating with the oil pump 20 and a second oil passage 24 formed by inclining the upper end of the first oil passage 26-1 and the oil gallery 24 to communicate with each other. A second oil passage 26-2; a third oil passage 26-3 formed symmetrically with respect to the oil passage 26-2 and communicating with the oil gallery 24; 1, 26-
The oil pump 20 and the oil gallery 24 are communicated by means of the V-type engine 2, that is, the branch line is connected to the cylinder row of the V-type engine 2, that is, the connection position between the first cylinder bank 8-1 side (the right side in FIG. An outlet 34 is provided, and an oil supply pipe 36 is connected to the branch outlet 34 as shown in FIG.
6 form the auxiliary device oil passage 30.

At this time, the branch outlet 34 and the oil supply pipe 36 are connected by forming a branch outlet 34 in the oil gallery 24 of the chain cover 22 as shown in FIG. A union bolt 38 is engaged with the outlet 34, and the oil supply pipe 36 is connected to the union bolt 38.

In this embodiment, the engine accessories are
Although described as the supercharger 28, an alternator, a power steering pump, a compressor of an air conditioner, or other devices may be assumed to be engine accessories (see a two-dot chain line in FIG. 7).

Reference numeral 40 denotes the cylinder block 4
, 42-1 and 42-2 are the first and second cylinder heads 6-1 and 6 of the cylinder block 4.
-2, first and second mounting surfaces, 44 is a surge tank, 46
Is a crank pulley, 48 is a water pump pulley, 50
Is a delivery pipe; 52 is a blind plug for closing a processing hole (not shown) of the oil passage 26; 54 is a cooling water pipe;
Is an exhaust pipe, 58 is an oil pump-side outlet of the oil passage 26, 60 is a water pump pulley (not shown), 62
Numeral denotes a mounting bolt hole of the chain cover 22, and numeral 64 denotes a flange of the chain cover 22.

Next, the operation will be described.

The lubricating oil pumped by the oil pump 20 is passed through an oil passage 26 to an oil gallery 24.
Is supplied from the oil gallery 24 to the lubricated portion, and the lubricating oil lubricates the lubricated portion.

At this time, part of the lubricating oil that has reached the oil passage 26 is supplied to the supercharger 28 as an engine accessory through the accessory oil passage 30. That is, a part of the lubricating oil that has reached the oil passage 26 is taken out of the chain cover 22 from the branch outlet 34, reaches the supercharger 28 via the oil supply pipe 36, and is supercharged by the lubricating oil. The machine 28 is lubricated.

Thus, even in the V-type engine 2 in which the oil gallery 24 is formed substantially at the center of the V-type engine 2 and above the crankshaft 12, a separate pipe directly connected to the oil gallery 24 is provided. Even without the provision, the lubricating oil can be taken out of the V-type engine 2 by the accessory oil passage 30 provided in the middle of the oil passage 26 of the chain cover 22, so that the number of parts does not increase and the configuration is not complicated. As a result, the production becomes easy, the cost can be reduced, the cost is low, and it is economically advantageous. In addition, the auxiliary oil passage 30 can be simplified, and the degree of freedom in the layout of the engine accessories can be increased. It is advantageous.

Further, the branch outlet 34 is provided at the connecting position between the skirt portion 32 and the cylinder row of the V-type engine 2, that is, the first cylinder bank 8-1 side (the right side in FIG. 1). Dead space can be used, space efficiency is good, and appearance can be improved, which is practically advantageous. In addition, there is no fear that the entire width of the V-type engine 2 becomes large due to the connection of the oil supply pipe 36, and the V-type engine 2 does not hinder the attachment of the belt-driven auxiliary device arranged around the chain cover 22.

Further, when the oil passage 26 is formed in the chain cover 22, the oil passage 26 is formed above the crankshaft 12, so that the boss portion of the oil passage 26 contributes to improvement in rigidity. As a result, film vibration of the chain cover 22 can be effectively prevented.

It should be noted that the present invention is not limited to the above-described embodiment, and various application modifications are possible.

For example, in the embodiment of the present invention, the branch outlet is provided in the middle of the oil passage of the chain cover. However, if a machining hole for forming the oil passage is used as the branch outlet, a new branch outlet is provided. There is no need to form a branch outlet, and the number of processing steps is reduced, which can contribute to cost reduction.

In the embodiment of the present invention, the lubricating oil is supplied from the oil pan to the oil passage formed in the chain cover. However, the lubricating oil is supplied not only from the oil pan but also from the cylinder block. May be supplied from the lower case. Further, the supply of the lubricating oil may be a path that is supplied from the oil gallery 24 to the oil passage 26 of the chain cover 22, contrary to the embodiment.

[0036]

As described above in detail, according to the present invention, in a lubricating oil supply structure for forming an oil gallery at a substantially central portion of a cylinder block of an engine and for supplying lubricating oil to the oil gallery by an oil pump, A chain cover is provided to cover one side of the engine.An oil passage is provided inside the chain cover to guide the lubricating oil from the oil pump to the oil gallery. Because the oil passage is provided, even if the engine has an oil gallery at the substantially central part of the engine, even if the engine does not require a separate pipe that is directly connected to the oil gallery, Lubricating oil can be taken out of the engine through the oil passage, and the number of parts does not increase. By not complicating the structure, it is easy to manufacture, the cost can be reduced, and it is economically advantageous.Also, the oil passage for auxiliary equipment can be simplified, and the degree of freedom in the layout of engine accessories can be increased. It is practically advantageous.

[Brief description of the drawings]

FIG. 1 is a front view of a chain cover showing an embodiment of the present invention.

FIG. 2 is a right side view of the engine.

FIG. 3 is a front view of the engine.

FIG. 4 is a front view of the engine with a chain cover removed.

FIG. 5 is an enlarged sectional view taken along line VV in FIG. 1;

FIG. 6 is an enlarged view of FIG.

FIG. 7 is a right side view of the engine in a state where an auxiliary device oil passage is provided.

FIG. 8 is a schematic enlarged sectional view of an oil gallery and a branch outlet.

FIG. 9 is a front view of a cylinder block showing the first prior art of the present invention.

FIG. 10 is a right side view of the cylinder block.

FIG. 11 is a front view of a cylinder block showing a second prior art of the present invention.

[Explanation of symbols]

 2 V-type engine 4 Cylinder block 6-1 First cylinder head 6-2 Second cylinder head 8-1 First cylinder bank 8-2 Second cylinder bank 12 Crankshaft 14 Oil pan 16-1 First head cover 16-2 2nd head cover 20 oil pump 22 chain cover 24 oil gallery 26 oil passage 28 supercharger 30 auxiliary oil passage 32 skirt portion 34 branch outlet 36 oil supply pipe 38 union bolt

Claims (2)

[Claims] An oil gallery is formed at a substantially central portion of a cylinder block of an engine, and a lubricating oil supply structure for feeding lubricating oil to the oil gallery by an oil pump is provided with a chain cover that covers one surface of the engine. An oil passage for guiding the lubricating oil from the oil pump to the oil gallery is provided inside the chain cover, and an oil passage for an auxiliary device that branches from the oil passage and lubricates the engine accessories is provided in the middle of the oil passage. Lubricating oil supply structure for engine accessories. 2. The lubricating oil supply for an engine accessory according to claim 1, wherein the oil passage is provided with a branch outlet communicating with an accessory oil passage at a connection position between a cylinder row and a skirt portion of the engine. Construction.