JP2003294194A - Mounting method of engine cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve fixing strength of an engine cover and suppress deterioration in serviceability, while suppressing the increase of the number of part items. <P>SOLUTION: A filler cap 14 closing an oil-filling port formed on a cylinder head cover 2 and an engine cover 3 covering the cylinder head cover 2 and forming an opening capable of inserting the filler cap 4, are provided. The oil filling port is arranged near the one end side 2c of the cylinder arrangement direction arranging a timing belt 10 and the inside diameter of the opening is set up so that the engine cover is located on an oil seal part of the peripheral edge part of the oil filling port, the engine cover 3 is pinched and fixed with the filler cap 4 on the oil seal part by inserting and fixing of the filler cap 4 to the oil filling port. The filler cap 4 is used as the fixing member of the engine cover 3 as well, and the fixing strength of the engine cover 3 is improved without increasing fixing members. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine cover mounting method, and more particularly to an engine cover mounting method capable of improving fixing strength and serviceability.

[0002]

2. Description of the Related Art Conventionally, the upper side of an engine is covered with an engine cover in order to improve the appearance of the engine room and suppress the generation of engine noise. Also,
Since the oil can be changed even when the engine cover is attached, the engine cover is formed with an opening into which a filler cap can be inserted to close the oil injection port formed on the cylinder head cover. Is being done. (For example, Jitsuko Sho 63-27193
According to such a configuration, it is possible to improve the appearance in the engine room and suppress the generation of engine noise while enabling oil exchange.

[0003]

By the way, since the engine cover is affected by engine vibration, it is required to improve its fixing strength. Especially, when engine vibration is compared at both ends in the cylinder arrangement direction. , The one end side where the winding members (timing belt, timing chain) for driving the camshaft and the crankshaft are arranged is more vibrated than the other end side where the flywheel is arranged. The fixing of the engine cover on the side is required to be stronger. In order to meet this requirement, it is conceivable to increase the number of fixing points on one end side, but simply increasing the number of fixing points has the problem of increasing the number of parts and deteriorating the detachability of the engine cover. . Although the above-mentioned prior art discloses that the sound insulation cover (engine cover) is firmly fixed using a filler cap, the oil injection port,
There is no disclosure or suggestion of disposing the filler cap in close proximity to the one end side in the cylinder arrangement direction described above and strengthening the fixation of the one end side. Further, according to the above-mentioned prior art, there is a problem that the oil leaks to the lower side of the engine cover when the oil is changed. That is, in the above-mentioned prior art, since the oil seal is not interposed between the engine oil inlet 11 (the collar portion 12) and the sound insulating cover (engine cover) 4, the oil is not exchanged with the engine oil inlet 11 when the oil is changed. Oil may leak onto the cylinder head cover member 1 on the lower side from the gap with the sound insulation cover 4. When the oil leaks, the sound insulating cover 4 must be removed in order to wipe off the leaked oil, which causes a problem that serviceability is deteriorated.
According to the above-mentioned prior art, the engine oil inlet 1
Although the elastic material 15 is interposed between the soundproof cover 1 and the sound insulating cover 4, the oil seal is not interposed, so that oil leakage cannot be sufficiently suppressed.

The present invention has been made in consideration of the above problems, and an object thereof is to provide an engine cover mounting structure capable of improving the fixing strength of the engine cover while suppressing an increase in the number of parts. Especially. Another object of the present invention is to provide an engine cover mounting structure capable of suppressing deterioration of serviceability.

[0005]

In order to achieve the above object, the present invention has the following means for solving the problem. That is, in the first configuration of the present invention, a cylinder head cover, a filler cap that closes an oil injection port formed in the cylinder head cover, and a cylinder cap that is disposed at least above the cylinder head cover to cover the cylinder head cover, In an engine cover mounting method including an engine cover in which an opening into which the filler cap can be inserted is formed at a position facing the oil inlet, the oil inlet is
The opening is arranged close to one end side in the cylinder arrangement direction in which winding members for driving each shaft of the engine are arranged, and the opening is formed on an oil seal formed on a peripheral portion of the oil inlet. The inner diameter is set so that the engine cover is positioned, and the engine cover is configured to be clamped and fixed by the filler cap on the oil seal portion when the filler cap is inserted and fixed in the oil inlet. There is. According to the first configuration of the present invention, at the position close to the one end side where the winding members (timing belt, timing chain) for driving the cam shaft and the crank shaft are arranged, the engine cover is provided with the filler cap and the cylinder. Since it is fixed to the head cover, the filler cap can also serve as a fixing member for fixing the engine cover, and the fixing strength of the engine cover can be improved without increasing the number of fixing members on one end side.

Further, in the second structure of the present invention, the engine cover is provided with fixing portions such that one end side in the cylinder arrangement direction is larger than the other end side, and one fixing portion on one end side is set. One is constituted by sandwiching and fixing by the filler cap. According to the second configuration of the present invention, since one of the fixing points on one end side where engine vibration is large is also used as the filler cap, the number of fixing points can be increased without increasing the number of fixing members. The fixing strength can be improved.

In the third structure of the present invention, the engine cover is tapered so that the engine cover on the oil seal portion is inserted at a predetermined inclination angle with respect to the central axis of the oil inlet. In addition, when the filler cap is inserted into the oil inlet, a protrusion having a predetermined elastic force is formed so as to come into contact with the inner peripheral surface of the oil inlet. According to the third configuration of the present invention, when the filler cap is inserted, the projecting portion is pressed by the filler cap toward the inner peripheral surface of the oil injection port. Therefore, the engine cover near the oil injection port is axially moved by the filler cap. Since it is fixed by the pressing force and the pressing force in the radial direction by the protruding portion, the fixing strength of the engine cover can be improved.

Further, in the fourth structure of the present invention, an engaging portion that engages with the inner peripheral surface of the oil inlet is formed at the tip of the protrusion, and the inside of the oil inlet is formed. An engaged portion with which the engaging portion is engaged is formed on the peripheral surface, and the engaging portion is engaged with the engaged portion by inserting the filler cap into the oil inlet. It is configured to. According to the fourth configuration of the present invention,
Since the engine cover near the oil inlet is fixed by the axial pressing force of the filler cap and the radial pressing force of the protruding portion as in the third configuration, the fixing strength of the engine cover can be improved. it can. Also,
By engaging the engaging portion and the engaged portion, it is possible to firmly fix the engine cover against vibration in the vertical direction (axial direction of the oil injection port).

In the fifth structure of the present invention, the engine cover is a resin engine cover. According to the fifth configuration of the present invention, the engine cover can be formed of a resin engine cover.

In the sixth aspect of the present invention, a cylinder head cover, a filler cap for closing an oil injection port formed in the cylinder head cover, and a cylinder cap which is arranged at least on the upper side of the cylinder head cover to cover the cylinder head cover. Along with the method for mounting the engine cover, the engine cover is provided with an opening through which the filler cap can be inserted at a position facing the oil inlet, wherein the opening is a peripheral portion of the oil inlet. The inner diameter of the engine cover is set so that the engine cover is located on the oil seal portion formed on the oil seal portion, and the engine cover is formed on the oil seal portion by inserting and fixing the filler cap into the oil inlet. At the end, it will be clamped and fixed by the filler cap Configure and Aru. According to the sixth aspect of the present invention, the engine cover is extended so that the engine cover is located on the oil seal portion, and the filler cap is fixed to the cylinder head cover on the oil seal by inserting and fixing the filler cap in the oil injection port. As a result, the gap between the engine cover and the oil inlet is eliminated, and it is possible to prevent oil leakage from the gap between the engine cover and the oil inlet to the lower side of the engine.

[0011]

According to the present invention, the fixing strength of the engine cover can be improved while suppressing an increase in the number of parts. In addition, it is possible to prevent the oil from leaking through the gap between the engine cover and the oil inlet, so that it is possible to suppress deterioration of serviceability.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the V-type 6-cylinder engine 1 seen from above (note that in the figure, fillets representing the R portion, the taper, etc. are shown from the relationship of the three-dimensional CAD data which is the basis of the drawing. Line is included), the engine cover 3 made of resin is arranged above the engine 1 to cover the cylinder head cover 2 of the one bank located on the vehicle front side. The engine cover 3 is configured in a shape as shown in FIG. 2, which is a plan view of the engine cover 3 when the single body of the engine cover 3 is viewed from above.
Opening 3a into which the filler cap 4 for closing the oil injection port 3a is inserted, insertion part 3b into which the intake manifold 5 is inserted, and fixing bolt insertion ports 3c and 3d for fixing the cylinder head cover 3 with fixing bolts. And are formed. Further, as shown in FIG. 3 which is a cross-sectional view taken along the line AA of FIG. 1, the opening 3a is a seal portion around the oil injection port 2a formed at the upper wall of the cylinder head cover 2 at the end of the cylinder head cover 2. The inner diameter is set so as to extend up to 2b. As shown in FIG. 1, the opening 3a and the fixing bolt insertion port 3c have a timing belt 8 as a winding member for driving cam pulleys 6 and 7 for driving a cam shaft (not shown), and a power steering. Oil pump 9, air compressor 10
Auxiliary machine drive belt 1 as a winding member for driving etc.
1 and 2 are arranged close to one end side 2c in the cylinder arrangement direction. The engine cover 3 is supported on the vehicle rear end side by inserting the intake manifold 5 into the insertion portion 3b, while on the vehicle front side, the fixing bolts are inserted into the fixing bolt insertion ports 3c and 3d. And the oil injection port 2 as shown in FIG.
The filler cap 4 is inserted into the opening 3a and the oil inlet 2a and screwed and fixed on the seal portion 2b at the periphery of the edge a, so that the filler cap 4 is sandwiched and fixed between the filler cap 4 and the seal portion 2b via the oil seal 12. Is configured. In FIG. 1, 13 is an exhaust manifold of one bank located on the front side of the vehicle, 14 is a catalyst connected to the downstream end of the exhaust manifold 13, 15 is a cylinder head cover of the vehicle rear bank, and 16 is a throttle valve ( A throttle body (not shown) is provided, and 17 is an exhaust gas recirculation valve.

As described above, according to the first embodiment, the engine cover 3 is provided with the filler cap 4 on the cylinder head cover 2 on the seal portion 2b adjacent to the one end side 2c in the cylinder arrangement direction in which the timing belt 8 is arranged. Since it is sandwiched and fixed with the seal portion 2b, the filler cap 4 can also be used as a fixing member for fixing the engine cover 3, and the one end side 2c in the cylinder arrangement direction where the engine vibration is large without increasing the fixing member. The fixing strength of the engine cover 3 can be improved. Further, since the inner diameter of the opening 3a is set so that the end portion of the engine cover 3 is extended and positioned above the seal portion 2b, the engine cover 3 and the oil inlet 2 are arranged.
The gap with a is eliminated, and oil leakage from the gap to the lower side of the engine can be prevented. Further, the vehicle rear end portion side of the engine cover 3 is provided with an insertion portion 3c formed in the engine cover 3.
Since the intake manifold 5 is supported by being inserted thereinto, the mounting strength of the engine cover 3 can be improved without increasing the number of fixing members.

(Second Embodiment) In the second embodiment, a protrusion 3e is formed at an end of the engine cover 3 and is inserted at a predetermined inclination angle with respect to the central axis L of the oil inlet 2a. This is different from the first embodiment. Hereinafter, the difference will be described based on FIG. 4 showing the fixing structure of the engine cover 3 according to the second embodiment and showing the filler cap non-inserted state and FIG. 5 showing the filler cap inserted state. First, the inner peripheral surface of the oil inlet 2a is formed in a tapered shape so that the inner diameter of the oil inlet 2a gradually decreases from the upper side to the lower side. Also, the protrusion 3e
Is the oil inlet 2 when the filler cap 4 is not inserted.
When the filler cap is inserted, as shown in FIG. 5, when the filler cap is inserted, the protruding portion 3e is oiled by the filler cap 4, as shown in FIG. It is configured to be pressed to the inner peripheral surface side of the inlet 2a. That is, since the engine cover 3 is made of resin and has an elastic force, the protrusion 3
The e is elastically deformed by being pressed by the filler cap 4, and is pressed by the inner peripheral surface of the oil injection port 2a.

As described above, according to the second embodiment, when the filler cap 4 is inserted, the protruding portion 3e is pressed against the inner peripheral surface of the oil inlet 2a by the filler cap 4, so that the vicinity of the oil inlet 2a is prevented. Engine cover 3
Is fixed to the cylinder head cover 2 by the axial pressing force of the filler cap 4 and the radial pressing force of the protrusion 3e, so that the engine cover 3 is fixed on the one end side 2c in the cylinder arrangement direction where engine vibration is large. The strength can be improved. Further, since the protruding portion 3e functions as a guide when the oil is injected into the oil injection port 2a, it is possible to suppress oil leakage during oil exchange.
A slit may be formed at an appropriate position on the circumference of the protrusion 3e so that the protrusion 3e can be easily deformed.

(Third Embodiment) In the third embodiment, the protrusion 3
It differs from the second embodiment in that an engaging portion 3f is formed at the tip of e. Hereinafter, the difference will be described based on FIG. 6 showing the fixing structure of the engine cover 3 according to the third embodiment and showing the filler cap non-inserted state and FIG. 7 showing the filler cap inserted state. First, as in the second embodiment, the inner peripheral surface of the oil injection port 2a is formed in a taper shape such that the inner diameter of the oil injection port 2a gradually decreases from the upper side to the lower side thereof, and the taper shape is formed. An engaged portion 2d with which the engaging portion 3f is engaged is formed on the formed inner peripheral surface. Also, the protrusion 3e
Is the oil inlet 2 when the filler cap 4 is not inserted.
When the filler cap is inserted, as shown in FIG. 7, when the filler cap is inserted, the protruding portion 3e is oiled by the filler cap 4, as shown in FIG. The engaging portion 3f is configured to be engaged with the engaged portion 2d by being pressed toward the inner peripheral surface of the inlet 2a.

As described above, according to the third embodiment, when the filler cap 4 is inserted, the protrusion 3e is pressed against the inner peripheral surface of the oil inlet 2a by the filler cap 4, and the engaging portion 3f is engaged. Since the engine cover 3 near the oil inlet 2a is engaged with the portion 2d, the engine cover 3 is fixed to the cylinder head cover 2 by the axial pressing force of the filler cap 4 and the radial pressing force of the protrusion 3e. , Engine vibration is large Cylinder arrangement direction one end side 2
The fixing strength of the engine cover 3 in c can be improved. Moreover, the engine cover 3 can be firmly fixed to the cylinder head cover 2 against the vibration in the vertical direction of the engine by the engagement between the engaging portion 3f and the engaged portion 2d.

In this embodiment, an example in which the resin engine cover 3 is used as the engine cover 3 is shown.
A metal engine cover may be used. In addition, in the present embodiment, the engine cover 3 allows the V-shaped 6
Although the example in which only the cylinder head cover 2 of the vehicle front side bank of the cylinder engine is covered is shown, the cylinder head cover 15 of the vehicle rear side bank may be covered. Also,
In the present embodiment, an example in which it is applied to a V-type 6-cylinder engine is shown, but it may be applied to an engine having a different number of cylinders such as a 4-cylinder engine. Further, as shown in FIG. 8, the engine cover 3 is provided with a positioning portion 3g that engages with the outer peripheral surface of the oil injection port 2a to improve the positioning performance when the engine cover 3 is attached to the cylinder head cover 2. Good.

[Brief description of drawings]

FIG. 1 is a plan view of an engine according to a first embodiment.

FIG. 2 is a structural diagram of an engine cover according to the first embodiment.

3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view showing an engine cover fixing structure when a filler cap is not inserted according to the second embodiment.

FIG. 5 is a cross-sectional view showing an engine cover fixing structure when a filler cap is inserted according to the second embodiment.

FIG. 6 is a cross-sectional view showing an engine cover fixing structure when a filler cap is not inserted according to the third embodiment.

FIG. 7 is a sectional view showing an engine cover fixing structure when a filler cap is inserted according to a third embodiment.

FIG. 8 is a sectional view showing an engine cover fixing structure according to another embodiment.

[Explanation of symbols]

1: Engine 2: Cylinder head cover 2a: Oil inlet 2b: Oil seal part 2c: One end side in the cylinder arrangement direction 2d: engaged part 3: Engine cover 3a: opening 3c: Fixing bolt insertion port 3d: Fixing bolt insertion port 3e: protrusion 3f: engaging part 4: Filler cap 6: Cam pulley 7: Cam pulley 8: Timing belt (wrapping member)

Continued front page    F term (reference) 3G015 BJ02 BJ08 CA05 DA08 EA04                 3G024 AA71 DA19 FA00 FA05 HA13

Claims (6)

[Claims] 1. A cylinder head cover, a filler cap for closing an oil injection port formed in the cylinder head cover, a filler cap disposed at least above the cylinder head cover to cover the cylinder head cover, and to face the oil injection port. A method for mounting an engine cover, comprising: an engine cover in which an opening into which the filler cap can be inserted is formed; and a cylinder in which a winding member for driving each shaft of the engine is arranged in the oil inlet. The opening is arranged close to one end side in the arrangement direction, and the inner diameter of the opening is set so that the engine cover is located on the oil seal portion formed in the peripheral portion of the oil injection port. Is that the filler cap is inserted and fixed in the oil inlet. Mounting of the engine cover, characterized in that it is configured to be sandwiched and fixed by the filler cap in a more the oil seal portion on. 2. The engine cover is provided with fixing points such that one end side in the cylinder arrangement direction is larger than the other end side, and one of the fixing points on one end side is sandwiched and fixed by the filler cap. The engine cover mounting method according to claim 1, wherein: 3. The engine cover is formed in a tapered shape so as to be inserted from the engine cover on the oil seal portion at a predetermined inclination angle with respect to the central axis of the oil injection port, and the oil injection is performed. The protrusion having a predetermined elastic force is formed so as to come into contact with the inner peripheral surface of the oil injection port by inserting the filler cap into the mouth. How to attach the indicated engine cover. 4. An engaging portion that engages with the inner peripheral surface of the oil inlet is formed at the tip of the protruding portion, and the engaging portion is provided on the inner peripheral surface of the oil inlet. Is formed so that the engaged portion is engaged with the engaged portion by inserting the filler cap into the oil inlet. The method of mounting the engine cover according to claim 2. 5. The engine cover is composed of a resin engine cover.
5. The method for mounting the engine cover according to any one of 1 to 4. 6. A cylinder head cover, a filler cap for closing an oil injection port formed in the cylinder head cover, a filler cap disposed at least on the upper side of the cylinder head cover to cover the cylinder head cover, and to face the oil injection port. An engine cover mounting method, comprising: an engine cover in which an opening into which the filler cap can be inserted is formed; and the opening is on an oil seal portion formed in a peripheral portion of the oil inlet. The inner diameter is set so that the engine cover is located, the engine cover, the filler cap is inserted into the oil inlet,
A method for mounting an engine cover, which is configured to be sandwiched and fixed by the filler cap on the oil seal portion by being fixed.