JP3427660B2 - Engine cylinder head cover 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 engine cylinder head cover structure, and more particularly, it can reliably prevent oil from spilling from an oil supply hole and flowing down by a guide rib to prevent the oil from falling into an exhaust manifold of the cylinder head cover. The present invention relates to a cylinder head cover structure for an engine, in which there is no fear that the exhaust manifold will be contaminated with oil, the structure of the guide ribs is simple, the manufacturing is easy, and the cost is low.

[0002]

2. Description of the Related Art Some engines mounted on a vehicle are mounted horizontally or vertically, and the engine includes a cylinder block, a cylinder head mounted on the upper surface of the cylinder block, and And an oil pan attached to the lower surface of the cylinder block.

A cylinder head cover is mounted above the cylinder head of the engine, and
The cylinder head cover is provided with a refueling hole, and a refueling cap is engaged with the refueling hole.

[0004]

By the way, in the conventional engine cylinder head cover structure, as shown in FIGS. 11 and 12, the engine 104 includes a cylinder block 110 and a cylinder head 112 mounted on the upper surface of the cylinder block 110. And the cylinder block 1
10 has an oil pan 114 attached to the lower surface.

A cylinder head cover 116 is mounted on the cylinder head 112 of the engine 104, and an oil supply hole 122 is provided in the cylinder head cover 116.

When oil is spilled around the oil supply hole 122 during or after the oil is injected from the oil supply hole 122, the spilled oil flows down.

At this time, when the engine mounted on the vehicle is inclined to the exhaust side (right side in FIG. 11),
Spilled oil flows down to the exhaust manifold side and reaches the exhaust manifold.

As a result, there is a disadvantage that dust or the like adheres to the spilled oil and the appearance of the exhaust manifold deteriorates.

Further, when the user or worker tries to wipe off oil, dust, etc. adhering to the intake manifold, the exhaust manifold shape and the exhaust manifold cover attached to the upper portion of the exhaust manifold make it difficult to wipe it off completely. It cannot be wiped off, which is disadvantageous in practical use.

Further, when the amount of oil and dust adhering to the exhaust manifold increases, heat is likely to be accumulated in the engine body, the cooling system is burdened, fuel consumption deteriorates, and it is economically disadvantageous. There is.

Furthermore, in the vicinity of the intake manifold, dirt is burned by the exhaust heat, which is difficult to remove.

[0012]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention provides a cylinder block and a cylinder head mounted on the upper surface of the cylinder block.
In a cylinder head cover structure of an engine having an oil pan to be mounted on a lower surface of the cylinder block and having an oil supply hole portion, the oil supply hole portion is provided on an exhaust manifold side of the cylinder head cover. A guide rib having a U-shaped cross section that protrudes outward to receive the oil spilled from the oil supply hole is provided in the outer peripheral portion of the cylinder head cover near the oil supply hole. It is provided integrally with the flange part on the outer peripheral side of the manifold side, the oil guide passage is exposed inside, and the end of the oil guide passage at the small height position that occurs in the outward protruding portion of the cylinder head cover that covers the chain chamber Is formed in an open state.

Further, the cylinder block, the cylinder head mounted on the upper surface of the cylinder block, and the oil pan mounted on the lower surface of the cylinder block are mounted on the upper portion of the cylinder head of the engine, and a hole for oil supply is provided. In the cylinder head cover structure of the engine, a plurality of spark plug holes are formed on a center line extending from one side to the other side in the longitudinal direction of the cylinder head cover, and the fuel supply is provided on one side and on the exhaust manifold side of the cylinder head cover. A cross section U is provided with a hole for oil supply, and the cylinder head cover outer peripheral portion in the vicinity of the oil supply hole projects outward in order to receive oil spilled from the oil supply hole.
A character-shaped guide rib is provided, and an oil receiving rib that surrounds one side of the cylinder head cover of the spark plug hole is provided in the spark plug hole near the oil supply hole so as to receive oil from the oil supply hole. It is characterized by being provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION By inventing as described above,
The guide ribs catch the oil spilling from the oil supply holes and prevent it from falling into the exhaust manifold of the cylinder head cover.There is no risk that the exhaust manifold will be contaminated with oil, and the structure of the guide ribs is simple. It is easy to manufacture, can be manufactured at low cost, and is economically advantageous. Further, by opening the end of the oil guide passage in the guide rib at the highest position, the oil guide passage is opened. There is no fear that the oil received from the machine will overflow, and the usability can be improved. Moreover, when the engine is mounted on the vehicle, it is separated from the exhaust manifold formed on the outward protruding portion of the cylinder head cover that covers the chain chamber. The end of the oil guide passage becomes the lowest height position, and the exhaust manifold may get dirty with oil. No.

Further, the guide ribs receive the oil spilling and flowing from the oil supply hole portion to surely prevent the oil from falling into the exhaust manifold of the cylinder head cover, and there is no fear that the exhaust manifold will be contaminated with the oil. Since the structure of the guide rib is simple, it is easy to manufacture, the cost can be reduced, and it is economically advantageous. Further, the oil spilled from the oil supply hole is not easily discharged from the spark plug hole side. It is stored in the oil receiving rib,
There is no risk of oil flowing down to the exhaust manifold side, preventing the exhaust manifold from being contaminated by oil, and the oil spilled from the oil supply hole is stored in the oil receiving rib on the spark plug hole side. After spilling, the oil spilled from the oil receiving rib flows down to the exhaust manifold side due to the height positional relationship and is accommodated in the guide rib, so that the exhaust manifold is never contaminated by the oil.

[0016]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 10 show an embodiment of the present invention. In FIG. 6, reference numeral 2 is a vehicle, 4 is a horizontal engine mounted on the vehicle 2, and 6 is a transmission.

As shown in FIG. 2, the vehicle 2 is equipped with an engine 4, a transmission 6, and various accessories 8.

The engine 4 includes a cylinder block 10, a cylinder head 12 mounted on the upper surface of the cylinder block 10, an oil pan 14 mounted on the lower surface side of the cylinder block 10, and a cylinder head 12. A cylinder head cover 16 mounted on the upper surface,
It has a chain case 18 that covers one side of the engine 4.

Then, the intake air of the engine 4 (INT
An intake manifold (not shown) is arranged on the K) side, and an exhaust manifold 20 is arranged on the exhaust (EXH) side of the engine.

When the oil supply hole 22 is provided in the cylinder head cover 16, the oil supply hole 22 is provided on the side of the exhaust manifold 20 of the cylinder head cover 16, and the outer peripheral portion of the cylinder head cover 16 near the oil supply hole 22 is provided. ,
A guide rib 24 having a U-shaped cross section is provided so as to project outward so as to receive the oil spilled from the oil supply hole 22.

More specifically, the guide ribs 24 are integrally provided on the flange portion 26 at the outer peripheral portion of the cylinder head cover 16 on the exhaust manifold 20 side. Here, the outer peripheral portion means the cylinder head cover 1 as shown in FIG.
6 of the flange portion 26 and the standing wall portion 28.

Further, the oil guide passage 30 is exposed inside the guide rib 24, and the end of the oil guide passage 30 at a small height is formed in the outward protruding portion 32 of the cylinder head cover 16 that covers the chain chamber (not shown). 34 (lower side in FIG. 1) is formed in an open state.

Here, the outer protruding portion 32 of the cylinder head cover 16 refers to a portion that protrudes in the left-right direction in the lower portion of FIG.

As shown in FIG. 1, the cylinder head cover 16 has a plurality of spark plug hole portions 36 formed on a center line C extending from one side to the other side in the longitudinal direction of the cylinder head cover 16 to form a cylinder head cover. The refueling hole portion 22 is provided on one side of the exhaust manifold 20 side of 16 and the spark plug hole portion 36 in the vicinity of the refueling hole portion 22,
An oil receiving rib 38 that surrounds one side of the cylinder head cover 16 of the spark plug hole 36 is provided to receive the oil from the oil supply hole 22.

At this time, the spark plug hole portion 36 is formed as shown in FIG.
Four cylinder head covers 16 are formed along the longitudinal centerline C of the cylinder head cover 16, and spark plug recesses 40 are formed around these spark plug hole portions 36, as shown in FIG.

The spark plug recess 40 formed around each spark plug hole portion 36 communicates with the cylinder head cover 16 on the side of the exhaust manifold 20 as shown in FIG.

When the engine 4 is mounted on the vehicle 2, the oil contained in the oil receiving rib 38 is tilted so that the height position of the right side portion of FIG. The oil spilled from the inside of the receiving rib 38 flows down to the guide rib 24 side and is accommodated by the oil guide passage 30.

Reference numeral 16a is a gasket mounting groove on the outer peripheral back surface of the cylinder head cover 16, 42 is a protrusion for adjusting the pressing force when the cylinder head cover 16 is sealed, and 4 is a protrusion.
Reference numeral 4 is a baffle plate mounting and positioning rib (not shown), 46 is a baffle plate mounting boss portion (not shown), 48 is an exhaust manifold cover of the exhaust manifold 20, and 50 is an oil supply cap engaged with the oil supply hole 22. , 52 is an air cleaner, 54 is a supercharger, 56 is an air bypass valve, 58 is an air bypass passage, 60 is a cam angle sensor, 62 is a thermo case, and 64 is a distributor.

Next, the operation will be described.

When the engine 4 is mounted on the vehicle 2,
As shown in FIG. 6, it is mounted in a horizontal mounting manner, and as shown in FIG. 8, it is mounted so that the height position on the exhaust manifold 20 side of the right side portion of FIG. To be done.

Further, as shown in FIG. 8, the height position of the guide rib 24 formed on the outer peripheral portion of the cylinder head cover 16 on the side of the exhaust manifold 20 becomes small, and the cylinder head cover 16 which covers the chain chamber (not shown) protrudes outward. The end 34 of the oil guide passage 30 formed in the portion 32
Is the lowest height position.

Further, in the oil receiving rib 38 that surrounds one side of the cylinder head cover 16 of the spark plug hole portion 36, the height position of the right side portion in FIG. 1 becomes smaller.

The oil spilled from the oil supply hole 22 flows down to the exhaust manifold 20 side due to the height relationship, is accommodated in the oil guide passage 30 of the guide rib 24, and is separated from the exhaust manifold 20 of the oil guide passage 30. It falls downward from the end 34 of the part to be processed.

Further, the oil spilled from the oil supply hole 22 is provided with an oil receiving rib 38 on the spark plug hole 36 side.
When the oil is spilled from the oil receiving rib 38, the oil spilled from the oil receiving rib 38 may be absorbed by the exhaust manifold 20 depending on the height.
It flows down to the side, is accommodated in the oil guide passage 30 of the guide rib 24, passes through the oil guide passage 30, and falls downward from the end portion 34 (not shown) on the chain chamber side, which is a portion separated from the exhaust manifold 20.

Thus, the oil that spills and flows down from the oil supply hole 22 can be received by the guide rib 24, so that the oil can be reliably prevented from falling into the exhaust manifold 20 of the cylinder head cover 16, and the exhaust manifold 20 can It is practically advantageous because there is no danger of it getting dirty.

Further, since the structure of the guide rib 24 is simple, it is easy to manufacture, the cost can be reduced, and it is economically advantageous.

Furthermore, by opening the smallest end 34 of the oil guide passage 30 in the guide rib 24, which is at the highest position, the oil received from the oil guide passage 30 is not likely to overflow and is easy to use. Can improve.

Furthermore, when the engine 4 is mounted on the vehicle 2, the end portion 34 of the oil guide passage 30 separated from the exhaust manifold 20 formed on the outward protruding portion 32 of the cylinder head cover 16 covering the chain chamber (not shown) is provided. Since the height of the exhaust manifold 20 is the smallest, it is practically advantageous because there is no fear that the exhaust manifold 20 will be contaminated with oil.

Further, the oil spilled from the oil supply hole portion 22 has an oil receiving rib 38 on the spark plug hole portion 36 side.
Since it is housed in the exhaust manifold 20, there is no fear that the oil will flow down to the exhaust manifold 20 side, and the exhaust manifold 20 can be prevented from being contaminated by the oil.

Further, the oil spilled from the oil supply hole 22 is provided with an oil receiving rib 38 on the spark plug hole 36 side.
The oil spilled from the oil receiving rib 38 after flowing into the exhaust manifold 20 flows down to the exhaust manifold 20 side due to the height positional relationship, and is stored in the oil guide passage 30 of the guide rib 24. The exhaust manifold 20 can be dropped downward from the end portion 34 of the portion separated from the manifold 20, and there is no fear that the exhaust manifold 20 will be contaminated with oil.

[0042]

As described in detail above, according to the present invention, the upper portion of the cylinder head of the engine having the cylinder block, the cylinder head mounted on the upper surface of the cylinder block, and the oil pan mounted on the lower surface of the cylinder block. In the cylinder head cover structure of the engine, which is equipped with a refueling hole part, is provided with a refueling hole part on the exhaust manifold side of the cylinder head cover. A guide rib with a U-shaped cross section that protrudes outward to receive spilled oil is provided, and the guide rib is integrally provided on the flange portion of the outer peripheral portion of the cylinder head cover on the exhaust manifold side, and the oil guide passage is exposed inside. The cylinder head cover that covers the chain chamber. Since the lower end of the twisting oil guide passage at the height position is formed in an open state, the oil that spills from the oil supply hole and flows down can be received by the guide rib, and the oil falls into the exhaust manifold of the cylinder head cover. Is surely prevented, and there is no fear that the exhaust manifold will be contaminated with oil, which is practically advantageous. Further, since the structure of the guide rib is simple, it is easy to manufacture, the cost can be reduced, and it is economically advantageous. Further, by opening the smallest end of the oil guide passage in the guide rib at the highest position, there is no fear that the oil received from the oil guide passage will overflow.
Usability can be improved. Furthermore, when the engine is mounted on the vehicle, the end of the oil guide passage that is separated from the exhaust manifold formed on the outward protruding portion of the cylinder head cover that covers the chain chamber is the smallest height position. As a result, there is no fear that the exhaust manifold will be contaminated with oil, which is practically advantageous.

Further, the cylinder block, the cylinder head mounted on the upper surface of the cylinder block, and the oil pan mounted on the lower surface of the cylinder block are mounted on the upper portion of the cylinder head of the engine, and an oil supply hole is provided. In the engine cylinder head cover structure, a plurality of spark plug holes are formed on a center line extending from one side to the other side in the longitudinal direction of the cylinder head cover, and an oil supply hole is formed on one side and on the exhaust manifold side of the cylinder head cover. A guide rib with a U-shaped cross section is provided on the outer peripheral portion of the cylinder head cover near the oil supply hole to project outward to receive oil spilled from the oil supply hole. The spark plug hole near the oil supply hole is provided. Surrounds one side of the cylinder head cover of the spark plug hole to receive oil from the oil supply hole. Since the provided that oil receiving rib,
The oil that spills from the oil supply hole and flows down can be received by the guide ribs, and it is possible to reliably prevent the oil from falling into the exhaust manifold of the cylinder head cover.
There is no fear that the exhaust manifold will get dirty with oil, which is practically advantageous. In addition, since the guide rib has a simple structure, it is easy to manufacture and the cost can be reduced.
Economically advantageous. Further, the oil spilled from the refueling hole is contained in the oil receiving rib on the spark plug hole side, so that there is no fear that the oil will flow down to the exhaust manifold side, and the exhaust manifold will be contaminated by the oil. Can be prevented. Furthermore, after the oil spilled from the oil supply hole is accommodated in the oil receiving rib on the spark plug hole side, the oil spilled from the oil receiving rib flows down to the exhaust manifold side due to the height positional relationship. By being housed in the guide ribs, there is no fear that the exhaust manifold will be contaminated with oil.

[Brief description of drawings]

FIG. 1 is a plan view of a cylinder head cover of an engine showing an embodiment of the present invention.

FIG. 2 is a front view of a cylinder head cover of the engine.

FIG. 3 is an enlarged sectional view taken along the line III-III in FIG.

FIG. 4 is an enlarged sectional view of a portion IV in FIG.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is a schematic plan view of a vehicle.

FIG. 7 is a schematic front view of the engine.

FIG. 8 is a left side view of the engine.

FIG. 9 is a front view of the engine.

FIG. 10 is a plan view of the engine.

FIG. 11 is a left side view of an engine showing a conventional technique of the present invention.

FIG. 12 is a plan view of the engine.

[Explanation of symbols]

2 vehicles 4 engine 6 transmission 8 accessories 10 cylinder block 12 cylinder head 14 oil pan 16 cylinder head cover 18 chain case 20 exhaust manifold 22 Refueling hole 24 Guide rib 26 Flange 28 Standing wall 30 oil guide passage 32 outward protrusion 34 Edge 36 Spark plug hole 38 Oil receiving rib 40 Spark plug recess 48 Exhaust manifold cover 50 refueling cap

Claims (2)

(57) [Claims] 1. An engine having a cylinder block, a cylinder head mounted on the upper surface of the cylinder block, and an oil pan mounted on the lower surface of the cylinder block is mounted on an upper portion of the cylinder head of the engine, and an oil supply hole is provided. In the cylinder head cover structure for an engine, the refueling hole is provided on the exhaust manifold side of the cylinder head cover, and the outer peripheral portion of the cylinder head cover near the refueling hole is directed outward to receive oil spilled from the refueling hole. A guide rib having a U-shaped cross section is provided so as to protrude to the cylinder head cover.
-Integrated with the flange on the outer peripheral side of the exhaust manifold side
And the oil guide passage is exposed inside,
On the outer protruding part of the cylinder head cover that covers the chain chamber
Open the end of the oil guide passage where the height position is small.
A cylinder head cover structure for an engine, characterized in that formed in the state. 2. A cylinder block, a cylinder head mounted on the upper surface of the cylinder block, and an oil pan mounted on the lower surface of the cylinder block. In the cylinder head cover structure of the engine , one side in the longitudinal direction of the cylinder head cover.
Form a plurality of spark plug holes on the center line extending from the
Form, exhaust manifold side 且 of the cylinder head cover
The refueling hole is provided on one side, and a guide rib having a U-shaped cross section that protrudes outward to receive oil spilled from the refueling hole is provided on the outer peripheral portion of the cylinder head cover near the refueling hole , Spark plug hole near the refueling hole
Spark plug to receive oil from the refueling hole
Oil that surrounds one side of the cylinder head cover of the use hole
A cylinder head cover structure for an engine, which is provided with a receiving rib .