JPS5838178Y2 - Automotive engine vibration damping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for damping vibrations generated by a motor vehicle engine or parts thereof.

In order to prevent noise emissions, it is known in stationary engines to completely cover the engine.

However, such a covering is extremely difficult to provide in motor vehicles, especially passenger cars, due to the location.

Additionally, these covered vehicles create temperature problems that are not resolved.

Furthermore, it is necessary to have easy access to the institution as well as for maintenance and after-sales service.

However, this is often difficult.

This is because the structure of passenger cars changes significantly due to many special requests and different laws in each country.

It has been previously known that noise and vibration can be suppressed by elastically supporting the engine parts that do not transmit power and the car body parts that are vibrated by the engine, and by attaching the engine itself to the chassis using vibration damping parts. .

However, such measures have little success in reducing the external noise of the object as a whole.

This is because mitigation of noise emissions from all noise-generating parts becomes a problem.

Therefore, in addition to full-scale coverings, also known partial coverings made of sheet metal or composite materials, it is not possible to reduce the noise emissions of the entire vehicle in the desired manner.

In order to further reduce external noise downwards, it is also known to completely enclose the engine compartment of a vehicle by means of a metal plate or plastic attached shell which is attached to the chassis or vehicle body.

However, this is not possible in passenger cars due to reasons such as ground clearance, location conditions within the front axle range, and steering linkage.
It is also not effective due to the temperature problems mentioned above, especially the oil temperature.

The problem of this invention is to reduce the noise emission of engines installed in automobiles more than before, but in doing so, it reduces the ground clearance, is uneconomical, significantly increases weight, heat load, and increases manufacturing costs. The objective is to avoid major obstacles as much as possible while still providing easy access to institutions.

In order to solve this problem, according to the present invention, the space between the engine and the part of the vehicle body or chassis surrounding the engine is provided with at least one sound-absorbing membrane made of a rubber elastic material that spreads out in a planar manner and is not subject to tension. or closed downwards by a mat, this membrane or mat being screwed to the engine on the one hand in the area of the upper edge of the sound-absorbing oil pan, and on the other hand screwing the edge to a part of the bodywork or chassis. The parts exposed to heat are additionally coated with an insulating material.

Furthermore, it is possible for the membrane or mat to be provided below the engine support, the starter motor, the rudder box and the water cooler blower.

By covering the engine in this way, the covering is formed by the engine part, the part of the car body that surrounds the engine, and a sound-absorbing membrane or mat installed between the two for soundproofing, compared to conventional metal structures. This results in significant advantages.

The advantage of this is that the sound-absorbing membrane or mat is extremely flexible, which helps the sound absorption, so that relative movements between the engine and the vehicle body are absorbed and eliminated without problems, and the rubber sound-absorbing membrane of the membrane or mat is This means that the outer shell does not exhibit the drop that normally occurs in the low frequency range.

In addition, solid vibration transmission through membranes or mats forming part of the overall enveloping of the engine is reduced.

The invention will be explained in detail below with reference to the embodiments shown in the drawings.

The engine 1 of the automobile normally includes parts of the bonnet 3 and fenders 4 that make up the car body, parts of the vertical members 5 and sub-frames 6 that make up the chassis, sound-absorbing membranes made of rubber according to the present invention or pine doors, and It is housed in an engine room 2 which is closed off by parts of the engine 1 itself.

The longitudinal member 5 is provided with a flange 8 for attachment, and one side of the sound-absorbing membrane or mat as the rubber-elastic covering member 7 according to the invention can be mounted by screws alone or by a strip or frame 9 and screws passing through it. The other side of the membrane or pine door, which is attached to the flange 8, is mounted on the engine 1 in the same way as the one side of the membrane or pine door according to the invention, by means of a flange 11, the attachment of which is provided on the engine 1 and carries the cover member. I'm getting lost.

Since the planar membrane or pine door is placed under tension, it is extremely flexible.

As can be seen from FIG. 1, the support body 12 of the engine 1 rests on the subframe 6 via a rubber support piece having a trapezoidal cross section.

In this case, two membranes or pine doors are provided above and below, and the upper membrane or pine door is wider than the lower membrane or pine door by an amount corresponding to the outer extension edge 7a, and the rubber support piece on the subframe 6 and the engine support 12.

Note that the membrane or mat is provided not only under the engine support 12 but also under the starter motor, vibration damper 19, and belt pulley.

Similarly, the membrane or mat also extends below the blower 20 for the water cooler 21.

As can be seen in FIG. 2, the membrane or mat extends longitudinally of the engine from the transmission 13 through the clutch housing 14 to the cooler 21 on both sides of the engine.

In the area 15 the membrane or mat also extends over the central area and is visible there on the transverse flange 16.
The strip 9 allows the membrane or mat to be attached in the manner already described.

In an intermodal manner, the engine is covered partly by its own external surface, partly by the body part and partly by a membrane or mat according to the invention, so that the engine compartment 2 of the motor vehicle
This prevents the noise generated inside the device from being emitted to the outside.

If the external surface of the engine itself is a covering wall, this external surface must be separated from the engine by an elastic intermediate layer or otherwise soundproofed.

Case 17 of the oil pan lacks a membrane or pine door.
It therefore forms part of the shroud itself, so that the ground clearance and oil cooling of the vehicle are not adversely affected.

The oil pan itself is elastically attached to the engine shell, for example, by vulcanizing the lower part to the frame.

The membrane or pine door is additionally coated with an insulating material at the points exposed to heat, so that it does not deteriorate due to heat.

In order to further dampen the noise originating from the engine, an absorption section 22 is provided in the exemplary embodiment before the cooler 21.

[Brief explanation of the drawing]

1 is a cross-sectional view taken along the line I--I in FIG. 2 of an engine room of an automobile having a vibration damping device according to the present invention, and FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. 1. 1... Engine, 2... Engine room, 3...
...Bonnet, 4...Fender, 5...
... Vertical member, 6 ... Subframe, 7 ... Membrane or mat, 17 ... Oil pan case.

Claims (1)

[Claims for Utility Model Registration] 1. A device for damping vibrations generated by an engine or a part thereof, in which the space between the engine 1 and the parts of the vehicle body 3, 4 or chassis 5, 6 surrounding this engine 1 is , closed downwards by at least one sound-absorbing membrane or pine door made of a rubber-elastic material that extends in a planar manner and is not under tension, while the sound-absorbing oil sump is closed at the upper edge of the case 17. for automobiles, characterized in that the edge is screwed to the engine 1 on the one hand, and the edges are screwed on the other hand to the vehicle body 3, 4 or the chassis 5, 60, and the heat-receiving areas are additionally coated with an insulating material. Engine vibration damping device. 2. The device according to claim 1, characterized in that the membrane or pine door is provided below the engine support 12, the starter motor, the rudder gearbox and the water cooler blower 20.