JP2002206411A - Oil pan cover for vehicle engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid interference with other members while preventing infiltration of water. SOLUTION: This oil pan cover 21 is provided with a cover body 22 of rigidity, having a corresponding inner surface form to an outer surface form of an oil pan 16 provided at a lower part of a vehicle engine, and a foam material 23 formed integrally with the cover body 22 on the inner surface of the cover body 22 facing the oil pan 16. An opening part 22a is formed in the cover body 22, and the opening part 22a is sealed with a waterproof resin sheet 24 so as to cover the foam material 23 exposed from the opening part 22a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pan which covers an oil pan provided at a lower part of a vehicle engine, damps the oil pan and absorbs sound, thereby reducing noise leaking outside the vehicle or into a vehicle compartment. It is about the cover.

[0002]

2. Description of the Related Art An engine used in a vehicle is provided with an oil pan for closing a lower portion of a cylinder block. This oil pan is liable to vibrate due to rotation of a crankshaft or the like inside the engine, and there is a problem that noise generated inside the engine leaks to the outside of the vehicle or to the passenger compartment. In order to solve this problem, the oil pan is conventionally covered with an oil pan cover. A conventional oil pan cover includes a rigid cover body having an inner surface shape corresponding to the outer shape of the oil pan, and a foam integrally formed with the cover body on an inner surface of the cover body facing the oil pan. Prepare. In this oil pan cover, while the oil pan is covered, the foam adheres to the oil pan, damping the vibration of the oil pan together with the cover body to reduce noise, and the foam leaks from the oil pan together with the cover body. It is configured to reduce the noise leaking to the outside of the vehicle or the passenger compartment by absorbing the noise.

On the other hand, an engine is mounted on a chassis frame of a vehicle via an engine mount, and has an independent vibration system with respect to the chassis frame. Further, a member such as an axle housing is attached to a chassis frame near the engine in a state having a unique vibration system. For this reason, if a member such as the axle housing is mounted below the vicinity of the engine, the engine may interfere with other members such as the axle housing during actual running. Although such interference is arranged so as not to occur in a normal state, it is necessary to avoid deformation of the oil pan cover and the like in the case where interference occurs. To this end, it is conceivable to avoid such interference by cutting or denting a portion where other members of the oil pan cover may interfere.

[0004]

However, if a part of the oil pan cover is cut out, noise leaks from the part, and if the part is dented, the thickness of the foam material in the part decreases. The sound absorbing function is reduced.
As a solution to this problem, an opening is formed only in the cover body and a flexible foam is made to emerge from the opening, without impairing the function of the oil pan cover that reduces noise leaking outside the vehicle or the vehicle compartment, It is conceivable to avoid direct interference of the rigid cover body. But,
By simply forming an opening in the cover body, for example, rainwater or washing water during traveling in rainy weather or during car washing enters the inside of the cover body from the opening, and the metal oil pan and the cover body are made of metal. In some cases, there is a problem that even the cover body is corroded. SUMMARY OF THE INVENTION It is an object of the present invention to provide an oil pan cover for a vehicle engine that can effectively prevent interference with other members of the cover body while preventing water from entering the inside of the cover body.

[0005]

According to the first aspect of the present invention,
As shown in FIG. 1, a rigid cover body 22 having an inner surface shape corresponding to an outer surface shape of an oil pan 16 provided at a lower portion of a vehicle engine, and a cover body on an inner surface of the cover body 22 facing the oil pan 16. This is an improvement of the oil pan cover including the foam body 23 and the foam body 23 integrally formed. The characteristic configuration is that the opening 22a is formed in the cover main body 22, and the foam 2 exposed from the opening 22a is formed.
The opening 22 a is covered with the waterproof resin sheet 24 so as to cover the third resin sheet 3.

According to the first aspect of the present invention, the opening 22a is formed in the cover main body 22.
2a is covered with the foam 23 so that the flexible foam 23 emerges from the opening 22a, so that the function as an oil pan cover for reducing the noise leaking outside the vehicle or into the cabin is not impaired. For this reason, if the opening 22 a is formed in a portion that may interfere with the other member 13 of the cover body 22, the other member 13 attached to the chassis frame 11 by a vibration system independent of the engine 10 temporarily Even if the oil pan cover interferes, the member 13 does not directly interfere with the rigid cover body 22 and comes into contact with the foam 23 via the waterproof resin sheet 24. 2
2 can be avoided. Also, the cover body 2
2 is sealed with the waterproof resin sheet 24, so that, for example, rainwater or washing water during running in rainy weather or during car washing flows from the opening 22a through the cover body 2.
Thus, the metal member such as the oil pan 16 due to the intrusion of water can be avoided.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 2 shows an engine 1 used in a vehicle.
Indicates 0. The engine 10 is attached to a front portion of a chassis frame 11 via an engine mount bracket 12, and is attached to the chassis frame 11 by the engine mount bracket 12 by an independent vibration system. A front axle housing 13 is attached to the chassis frame 11 with its own vibration system near the lower portion of the engine 10. On the other hand, the engine 10 is provided with an oil pan 16 that covers a lower part of the cylinder block, in a state covered by an oil pan cover 21.

As shown in FIG. 1, the oil pan 16 is formed of a relatively thin plate material by sheet metal working or the like, and an oil pan cover 21 covering the oil pan 16 has an inner surface corresponding to the outer shape of the oil pan 16. The cover body 22 includes a rigid cover body 22 having a shape, and a foam body 23 integrally formed with the cover body 22 on an inner surface of the cover body 22 facing the oil pan 16. The cover main body 22 in this embodiment is made by press-molding polypropylene reinforced with glass fiber, and the cover main body 22 is placed in a molding die to foam a foam material inside the die. By the foam 23, the cover body 22
And formed integrally with it. Examples of the foam 23 include urethane foam and foam rubber.

On the other hand, as shown in the enlarged view of FIG. 1, an opening 22a is formed in the cover main body 22 facing the axle housing 13. The opening 22a is for avoiding interference between the engine 10 and the axle housing 13 each attached to the chassis frame 11 by an independent vibration system. The opening 22a is used when the cover main body 22 is molded. Cover body 2 integrally or after molding
2 is formed by punching or notching. The opening 22a is formed of the foam 2 exposed from the opening 22a.
3 is sealed with a waterproof resin sheet 24. Examples of the waterproof resin sheet 24 include a sheet made of a polyethylene film. The waterproof resin sheet 24 in FIG. 1 is a cover body 2 in which an opening 22a is formed in advance.
In a state where 2 is arranged in the molding die, it is arranged from the inside so as to cover the opening 22a. The waterproof resin sheet 24 arranged in this way is then adapted to the opening 22a by the foam 23 foamed inside the mold, and is adhered to the opening 22a and its periphery.

The vehicle engine 10 thus configured
When the oil pan cover 21 is put on the oil pan 16 provided at the lower part of the vehicle engine 10, the oil pan cover 21 covers The vibration of the oil pan 16 is suppressed together with the noise reduction 22 to reduce the noise, and the foam 23 absorbs the noise leaked from the oil pan 16 together with the cover main body 22 to reduce the noise leaking to the outside of the vehicle or the passenger compartment. Here, the opening 2 is provided in the cover body 22.
2a, the opening 22a of which is formed by the foam 2
3 to form a flexible foam 23 in its opening 22.
The function of the oil pan cover 21 for reducing the noise leaking to the outside of the vehicle or the vehicle compartment is not impaired since the oil pan cover 21 is caused to appear.

On the other hand, since the opening 22a is formed in a portion of the cover main body 22 facing the axle housing 13, the engine 10 mounted on the chassis frame 11 and the axle housing 13 temporarily interfere with each other by an independent vibration system. Even if a situation occurs, the axle housing 13 does not directly interfere with the cover body 22,
Since it comes into contact with the foam 23 via the waterproof resin sheet 24, deformation of the rigid cover body 22 can be avoided. Further, since the opening 22a of the cover main body 22 is sealed with the waterproof resin sheet 24, for example, rainwater or cleaning water during running in rainy weather or during car washing enters the inside of the cover main body 22 through the opening 22a. Therefore, it is possible to avoid corrosion of a metal member such as the oil pan 16 caused by intrusion of water.

In the above-described embodiment, the cover main body 22 made by press-molding polypropylene reinforced with glass fiber is used. Since rainwater or washing water does not penetrate into the water and no corrosion is caused by the water, the cover main body 22 may be made by pressing a metal plate.

In the above-described embodiment, an example is shown in which the waterproof resin sheet 24 covers the opening 22a from the inside of the cover main body 22, but as shown in FIG. 22a may be covered from outside the cover body 22. An adhesive is applied to the periphery of the waterproof resin sheet 24 in FIG. 3, and the periphery is adhered to the cover body 22 around the opening 22 a by the adhesive, and the waterproof resin sheet covers the opening 22 a from the outside. The foam body 23 is formed integrally with the cover body 22 on the inner surface of the cover body 22 by disposing the body 22 in a molding die and then foaming a foam material inside the mold. Further, in the oil pan cover shown in FIG. 3, after forming a foam body 23 integrally with the cover main body 22 on the inner surface of the cover main body 22, the periphery of the waterproof resin sheet 24 coated with an adhesive is surrounded by the foam. The opening 22a is adhered to the cover body 22 around the opening 22a with an adhesive.
a may be covered from the outside of the cover body 22 by the waterproof resin sheet 24.

[0014]

As described above, according to the present invention, although the opening is formed in the cover main body, since the opening is covered with the foam, the noise leaking to the outside of the vehicle or the passenger compartment is obtained. The function of reducing the noise is not impaired. For this reason, if an opening is formed in a portion where there is a possibility of interfering with other members, even if other members and the oil pan cover may interfere with each other, the oil pan cover only comes into contact with the foam, so that the cover body Can be avoided. Further, since the opening is sealed with a waterproof resin sheet, water does not enter the inside of the cover body from the opening, and corrosion of the metal member due to entry of water is avoided. Can be.

[Brief description of the drawings]

FIG. 1 is an AA view of FIG. 2 showing an oil pan cover of the present invention.
Line sectional view.

FIG. 2 is a front view showing an attached state of the engine having the oil pan cover.

FIG. 3 is a sectional view showing another oil pan cover corresponding to FIG. 1;

[Explanation of symbols]

 Reference Signs List 16 oil pan 22 cover body 22a opening 23 foam 24 waterproof resin sheet

Claims (1)

[Claims] 1. A rigid cover body (22) having an inner surface shape corresponding to an outer surface shape of an oil pan (16) provided at a lower portion of a vehicle engine, and an oil pan (16) of the cover body (22). An oil pan cover having a foam body (23) integrally formed with the cover body (22) on an inner surface facing the cover body (22), wherein an opening (22a) is formed in the cover body (22); An oil pan cover for a vehicle engine, wherein the opening (22a) is sealed with a waterproof resin sheet (24) so as to cover the foam (23) exposed from the opening (22a).