JP4134586B2 - Installing the engine cover - Google Patents

Description

[0001]
BACKGROUND 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]
[Prior art]
Conventionally, the upper side of the engine is covered with an engine cover in order to improve the appearance in the engine room and to suppress the generation of engine noise.
[0003]
Also, in order to enable oil exchange even when the engine cover is attached, the engine cover has an opening through which a filler cap can be inserted to close the oil inlet formed on the cylinder head cover. Has been made to form. (For example, refer to Japanese Utility Model Publication No. 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 replacement.
[0004]
[Problems to be solved by the invention]
By the way, since the engine cover is affected by the engine vibration, there is a demand for improving its fixing strength. In particular, when the engine vibration is compared at both ends in the cylinder arrangement direction, the camshaft and the crankshaft are driven. Because the vibration on the one end side where the winding members (timing belts, timing chains) are arranged is larger than the other end side where the flywheel is arranged, the engine cover is more firmly fixed on the one end side. Is required.
[0005]
To meet this requirement, it is conceivable to increase the number of fixing points on one end side. However, simply increasing the number of fixing points causes a problem that the number of parts increases and the detachability of the engine cover deteriorates. .
[0006]
In addition, according to the above-mentioned prior art, although it is disclosed that the sound insulation cover (engine cover) is firmly fixed using the filler cap, the oil inlet and the filler cap are arranged on one end side in the cylinder arrangement direction. There is no disclosure or suggestion about placing them close to each other and strengthening the fixation on the one end side.
[0007]
Further, according to the above-described prior art, there is a problem that oil leaks to the lower side of the engine cover when oil is changed.
[0008]
That is, in the above-described prior art, since no oil seal is interposed between the engine oil inlet 11 (collar portion 12) and the sound insulation cover (engine cover) 4, the engine oil inlet 11 Oil may leak onto the cylinder head cover member 1 on the lower side from the gap with the sound insulation cover 4. And when oil leaks, in order to wipe off the leaked oil, since the sound-insulation cover 4 must be removed, there exists a problem that service property deteriorates.
[0009]
In addition, according to the above-mentioned prior art, although the elastic material 15 is interposed between the engine oil inlet 11 and the sound insulation cover 4, the oil seal is not interposed. Can not.
[0010]
The present invention has been made in view of the above problems, and an object of the present invention 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. .
[0011]
Another object of the present invention is to provide an engine cover mounting structure that can suppress deterioration in serviceability.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides the following solution as a solution. That is, in the first configuration of the present invention, a cylinder head cover, a filler cap that closes an oil inlet formed in the cylinder head cover, and at least an upper side of the cylinder head cover to cover the cylinder head cover, An engine cover mounting method comprising an engine cover having an opening into which the filler cap can be inserted at a position facing the oil inlet, wherein the oil inlet is a winding for driving each shaft of the engine. The opening is disposed close to one end side in the cylinder arrangement direction where the hook member is disposed, and the opening has an inner diameter so that the engine cover is positioned on an oil seal portion formed at a peripheral portion of the oil inlet. There is set, the above-mentioned engine cover, the engine cover on the oil seal portion From a central axis of the oil inlet to be tapered at a predetermined inclination angle, and by inserting the filler cap into the oil inlet, the inner peripheral surface of the oil inlet a protruding portion formed having a predetermined elastic force so as to contact with, the engine cover is sandwiched and fixed by the filler cap on the oil seal portion by the filler cap is inserted into the oil inlet, is fixed It is configured as follows.
[0013]
According to the first configuration of the present invention, the engine cover is cylinder-filled by the filler cap at a position close to one end where the winding members (timing belt, timing chain) for driving the camshaft and crankshaft are arranged. Since it is fixed to the head cover, the fixing member for fixing the engine cover can also be used by the filler cap, and the fixing strength of the engine cover can be improved without increasing the fixing member on one end side.
[0014]
Furthermore, when the filler cap is inserted, the protrusion is pressed against the inner peripheral surface of the oil injection port by the filler cap, so the engine cover near the oil injection port is pressed in the axial direction by the filler cap and radially by the protrusion. Therefore, the fixing strength of the engine cover can be improved .
[0015]
Further, in the second configuration of the present invention, the above-mentioned engine cover, with a fixed position so that the cylinder arrangement Direction one end is increased relative to the other end side is set, one of fixing points at the one end the It is comprised so that it may be comprised by clamping by the filler cap.
[0016]
According to the second configuration of the present invention, since one of the fixing points on one end side where the engine vibration is large is also used by the filler cap, the fixing points can be increased without increasing the fixing member. Fixing strength can be improved.
[0017]
Further, in the third configuration of the present invention, the protruding portion is formed with an engaging portion that engages with the inner peripheral surface of the oil inlet at the tip, and on the inner peripheral surface of the oil inlet. The engagement portion to which the engagement portion is engaged is formed, and the engagement portion is engaged with the engagement portion by inserting the filler cap into the oil injection port. It is.
[0018]
According to the third configuration of the present invention, the engine cover in the vicinity of the oil inlet is fixed by the axial pressing force by the filler cap and the radial pressing force by the protruding portion as in the first or second configuration. Therefore, the fixing strength of the engine cover can be improved.
[0019]
Further, the engagement between the engaging portion and the engaged portion can be firmly fixed against vibrations in the vertical direction of the engine cover (in the direction of the oil injection port).
[0020]
In the fourth configuration of the present invention, the engine cover is constituted by a resin engine cover.
[0021]
According to the fourth configuration of the present invention, the engine cover can be configured by a resin engine cover .
[0022]
【The invention's effect】
According to the present invention, it is possible to improve the fixing strength of the engine cover while suppressing an increase in the number of parts. Further, since oil is prevented from leaking from the gap between the engine cover and the oil injection port, deterioration of serviceability can be suppressed.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Below it is described with reference to the embodiment of the present invention with reference to the accompanying drawings.
[0024]
( Reference example )
FIG. 1 is a plan view of the V-type 6-cylinder engine 1 as viewed from above. FIG. 1 shows a fillet representing an R portion, a taper, and the like based on the relationship of three-dimensional CAD data as a basis of the drawing In FIG. 2, a resin engine cover 3 that covers the upper side of the cylinder head cover 2 of the one-side bank located on the front side of the vehicle is disposed on the upper side of the engine 1.
[0025]
The engine cover 3 is configured in a shape as shown in FIG. 2 which is a plan view of the engine cover when the engine cover 3 is viewed from above, and the engine cover 3 has a filler cap 4 for closing the oil inlet 3a. Are formed, an insertion portion 3b into which the intake manifold 5 is inserted, and fixing bolt insertion ports 3c and 3d for fixing to the cylinder head cover 3 with fixing bolts.
[0026]
Further, the opening 3a is a seal portion at the periphery of the oil inlet 2a in which the end of the cylinder head cover 2 is formed in the upper wall portion of the cylinder head cover 2 as shown in FIG. The inner diameter is set so as to extend over 2b.
[0027]
Further, as shown in FIG. 1, the opening 3a and the fixing bolt insertion port 3c are provided with a timing belt 8 as a winding member for driving cam pulleys 6 and 7 for driving a camshaft (not shown), and for power steering. The auxiliary drive belt 11 as a winding member for driving the oil pump 9, the air compressor 10 and the like is disposed adjacent to one end side 2c in the cylinder arrangement direction.
[0028]
The engine cover 3 is supported on the vehicle rear end side by inserting the intake manifold 5 into the insertion portion 3b, and on the vehicle front side, the fixing bolt is inserted into the fixing bolt insertion ports 3c and 3d. As shown in FIG. 3, the filler cap 4 is inserted into the opening 3a and the oil injection port 2a and screwed and fixed on the seal portion 2b at the periphery of the oil injection port 2a. It is configured to be sandwiched and fixed via an oil seal 12 between the seal portion 2b.
[0029]
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 side bank, and 16 is a throttle valve ( A throttle body 17 provided with an illustration (not shown) is an exhaust gas recirculation valve.
[0030]
As described above, according to the reference example , the engine cover 3 is connected to the seal portion 2b of the cylinder head cover 2 by the filler cap 4 on the seal portion 2b close to the cylinder arrangement direction one end side 2c where the timing belt 8 is disposed. Therefore, the filler cap 4 can also be used as a fixing member for fixing the engine cover 3, and the engine cover 3 at the cylinder arrangement direction one end side 2c where engine vibration is large without increasing the number of fixing members. The fixing strength of can be improved.
[0031]
Further, since the inner diameter of the opening 3a is set so that the end of the engine cover 3 is extended to the position above the seal portion 2b, the gap between the engine cover 3 and the oil inlet 2a is eliminated, and the gap Oil leakage from the engine to the engine lower side can be prevented.
[0032]
Further, the vehicle rear end side of the engine cover 3 is configured to be supported by inserting the intake manifold 5 into the insertion portion 3c formed in the engine cover 3, so that the number of fixing members is not increased. The mounting strength of the engine cover 3 can be improved.
[0033]
(Embodiment 1 )
Embodiment 1, the end portion of the engine cover 3, differs from the reference example in that protruding portions 3e that with respect to the center axis L of the oil inlet 2a is inserted at a predetermined inclination angle are formed.
[0034]
Hereinafter, the fixing structure of the engine cover 3 according to the first embodiment will be described, and differences will be described based on FIG. 4 showing a filler cap non-inserted state and FIG. 5 showing a filler cap inserted state.
[0035]
First, the inner peripheral surface of the oil injection port 2a is tapered so that the inner diameter of the oil injection port 2a gradually decreases from the upper side toward the lower side.
[0036]
Further, when the filler cap 4 is not inserted, the protruding portion 3e is configured as a shape along the tapered shape while maintaining a predetermined distance from the tapered shape of the oil injection port 2a, and the filler cap is inserted. And as shown in FIG. 5, the protrusion part 3e is comprised by the filler cap 4 so that the inner peripheral surface side of the oil injection hole 2a may be pressed.
[0037]
That is, since the engine cover 3 is made of resin and has an elastic force, the protruding portion 3e is elastically deformed by being pressed by the filler cap 4 and is pressed against the inner peripheral surface of the oil injection port 2a.
[0038]
As described above, according to the first embodiment, when the filler cap 4 is inserted, the protruding portion 3e is pressed against the inner peripheral surface of the oil injection port 2a by the filler cap 4, so the engine cover 3 in the vicinity of the oil injection port 2a. Is fixed to the cylinder head cover 2 by the axial pressing force by the filler cap 4 and the radial pressing force by the projecting portion 3e, so that the engine cover 3 is fixed at one end side 2c in the cylinder arrangement direction where engine vibration is large. Strength can be improved.
[0039]
Further, since the protruding portion 3e functions as a guide when oil is injected into the oil injection port 2a, oil leakage during oil replacement can be suppressed.
[0040]
In addition, you may comprise so that a slit may be formed in the appropriate location on the periphery of the protrusion part 3e, and the protrusion part 3e may be deform | transformed easily.
[0041]
(Embodiment 2 )
The second embodiment is different from the first embodiment in that an engaging portion 3f is formed at the tip of the protruding portion 3e.
[0042]
Hereinafter, the structure for fixing the engine cover 3 according to the second embodiment will be described, and differences will be described based on FIG. 6 showing the filler cap non-inserted state and FIG. 7 showing the filler cap inserted state.
[0043]
First, the inner peripheral surface of the oil injection port 2a is configured in a tapered shape so that the inner diameter of the oil injection port 2a gradually decreases from the upper side toward the lower side, as in the first embodiment. An engaged portion 2d with which the engaging portion 3f is engaged is formed on the configured inner peripheral surface.
[0044]
Further, when the filler cap 4 is not inserted, the protruding portion 3e is configured as a shape along the tapered shape while maintaining a predetermined distance from the tapered shape of the oil injection port 2a, and the filler cap is inserted. As shown in FIG. 7, the protrusion 3e is pressed against the inner peripheral surface of the oil injection port 2a by the filler cap 4 so that the engaging portion 3f is engaged with the engaged portion 2d.
[0045]
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 injection port 2a by the filler cap 4, and the engaging portion 3f is engaged with the engaged portion 2d. In order to engage, the engine cover 3 in the vicinity of the oil inlet 2a is fixed to the cylinder head cover 2 by the axial pressing force by the filler cap 4 and the radial pressing force by the protruding portion 3e. The fixing strength of the engine cover 3 at one end side 2c in the cylinder arrangement direction with a large can be improved.
[0046]
In addition, the engine cover 3 can be firmly fixed to the cylinder head cover 2 against vibration in the vertical direction of the engine by the engagement of the engaging portion 3f and the engaged portion 2d.
[0047]
In the present embodiment, the resin engine cover 3 is used as the engine cover 3, but a metal engine cover may be used.
[0048]
In the present embodiment, an example is shown in which the engine cover 3 covers only the cylinder head cover 2 in the vehicle front side bank of the V-type 6-cylinder engine, but the cylinder head cover 15 in the vehicle rear side bank may be covered.
[0049]
In the present embodiment, an example is shown in which the present invention is applied to a V-type 6-cylinder engine.
[0050]
Further, as in the reference example 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 so as to improve positioning when the engine cover 3 is attached to the cylinder head cover 2. It may be.
[Brief description of the drawings]
FIG. 1 is a plan view of an engine according to the present invention .
FIG. 2 is a structural diagram of an engine cover according to the present invention .
Figure 3 is a view corresponding to A-A cross-sectional view of FIG. 1 in Reference Example.
FIG. 4 is a cross-sectional view showing an engine cover fixing structure when a filler cap is not inserted according to the first embodiment.
FIG. 5 is a cross-sectional view showing an engine cover fixing structure when a filler cap is inserted according to the first embodiment.
6 is a cross-sectional view showing an engine cover fixing structure when a filler cap is not inserted according to Embodiment 2. FIG.
FIG. 7 is a cross-sectional view showing an engine cover fixing structure when a filler cap is inserted in the second embodiment.
FIG. 8 is a cross-sectional view showing an engine cover fixing structure according to a reference example .
[Explanation of symbols]
1: Engine 2: Cylinder head cover 2a: Oil inlet 2b: Oil seal portion 2c: One end side 2d in the cylinder arrangement direction: Engaged portion 3: Engine cover 3a: Opening portion 3c: Fixing bolt insertion port 3d: Fixing bolt insertion port 3e: Protruding part 3f: Engaging part 4: Filler cap 6: Cam pulley 7: Cam pulley 8: Timing belt (wrapping member)

Claims (4)

A cylinder head cover;
A filler cap that closes the oil inlet formed in the cylinder head cover;
An engine cover provided with an engine cover that is disposed at least above the cylinder head cover so as to cover the cylinder head cover and that is formed with an opening into which the filler cap can be inserted at a position facing the oil inlet. In the method
The oil injection port is disposed close to one end side in the cylinder arrangement direction in which the winding member for driving each shaft of the engine is disposed,
The opening has an inner diameter set so that the engine cover is positioned on an oil seal portion formed at a peripheral portion of the oil inlet,
The engine cover is configured to have 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 inlet, and the filler cap is formed in the oil inlet. Is formed to have a predetermined elastic force so as to contact the inner peripheral surface of the oil injection port,
The engine cover mounting method, wherein the engine cover is configured to be sandwiched and fixed by the filler cap on the oil seal portion when the filler cap is inserted and fixed to the oil inlet. The aforementioned engine cover, with a fixed position so that the cylinder arrangement Direction one end is increased relative to the other end side is set, that one of the fixing points at the one end side is constituted by sandwiching fixed by the filler cap The engine cover mounting method according to claim 1, wherein the engine cover is mounted. The protrusion is formed with an engaging portion that engages with the inner peripheral surface of the oil injection port at the tip thereof,
An engaged portion with which the engaging portion is engaged is formed on the inner peripheral surface of the oil inlet,
By the filler cap is inserted into the oil injection mouth the engaging portion of the engine cover according to claim 1 or 2, characterized in that it is configured to be engaged with the engaged portion Mounting method. The engine cover, a method of mounting the engine cover according to any one of claims 1 to 3, characterized in that it is constituted by a resin engine cover.

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