DE10261820A1 - Vibration absorbing arrangement for installation of auxiliary unit in engine compartment of vehicle - Google Patents

Abstract

The holding device (1) joining an auxiliary unit (2) to the frame or other components in the engine compartment of a vehicle is provided with an opening for a screw (3) fitted with rubber rings (5, 6) at its shaft above and below the opening. Another rubber element (7) is positioned in a recess at the holding device (1) supporting it additionally against the part it is attached to. The auxiliary unit (2) is joined to the holding device (1) with at least one screw (9) guided through a rubber element (10), an adapter disk (11), and a second rubber element (12).

Description

The invention relates to an arrangement for the assembly and storage of an additional unit in the engine compartment Motor vehicle, consisting of one, with the vehicle body connected carrier console, on which the additional unit with the interposition of elastic elements is stored.

The noise quality in the passenger compartment Motor vehicle is different depending on the frequency range by physical operations and influenced by different assemblies. An essential source of noise is the internal combustion engine with its numerous individual parts, whereby here only exemplified the noises generated by the valves should be. The mass forces of the valve train arise in response to the acceleration of the Valve masses and can help to determine the hum level. When driving the valve control by means of Timing belt or timing chain can through the periodic loading and unloading of the teeth or chain links at the beginning howling of the procedure arise. additionally can due to cable vibrations from the timing chain or timing belt, even low-frequency ones Sounds occur. Finally determines the impact sound of the valves significantly the high-frequency engine noise and is common involved in the "harder" sound of multi-valve engines.

In addition to that directly from the internal combustion engine generated noise the noise quality in the Passenger cell in particular from the acoustic properties of the Additional units determined, for example, from assemblies of the anti-lock braking system. Independently Such noises predominantly come from the respective concrete source physical causes, so a direct reduction through design changes only possible to a limited extent is. Therefore, indirect damping is preferably implemented, by storing the additional units elastically. Thus acoustically achieves the effect of a facing shell and consequently the sound radiation reduced.

Out DE 39 28 059 C1 an arrangement for mounting and mounting the hydraulic unit of an anti-lock braking system in the engine compartment of a motor vehicle is known. Here, a console is provided as a support for the hydraulic unit. Several cup-shaped recesses are formed in the console, in each of which a rubber buffer with an axial recess is arranged. The hydraulic unit has several bearing journals which are assigned to the axial depressions of the rubber buffers. A vibration-isolating bearing is thus achieved in the clamped state between the hydraulic unit and the support bracket. However, the console is welded directly to the vehicle body, which continues to cause noise problems.

EP 0 717 690 B1 describes a bearing for the modulator of an anti-lock braking system, which is also supported on the body of a motor vehicle with a support bracket. Even with this technical solution, the assembly to be assembled is not attached directly to the console. Rather, openings are formed in the console in which the assembly is mounted with the interposition of elastic elements. A vibration-isolating mounting between the modulator and the carrier console is thus achieved. However, the console is screwed directly to the vehicle body. As a result, adequate noise damping is not achieved with this construction either, especially since attachment of the bracket to the bulkhead is proposed here. An arrangement of additional units on the bulkhead is acoustically very critical, but it is often imperative for reasons of space.

The object of the invention is a To create an arrangement with which an additional unit in the engine compartment Motor vehicle can be stored so that when operating the internal combustion engine much better noise quality in the passenger compartment is achieved. This is said to be due in particular to improved damping between the additional unit, the carrier console and the assigned section of the vehicle body can be reached.

This problem is solved in that between the auxiliary unit and the vehicle body have a double acoustic Decoupling is provided by the additional unit on the elastic support bracket and the carrier console is resiliently mounted on the vehicle body. refinements are in the dependent dependent claims described, their characteristics and advantageous effects in the embodiment are explained in more detail.

The proposed technical solution is basically for Storage of various types of additional units on the body of a Suitable motor vehicle. A preferred application is assembly a valve block on the bulkhead. With this arrangement an additional acoustic decoupling stage realized, so that an essential better sound quality in the Passenger compartment results. The previously in certain operating points of the vehicle occurring tacker noises or humming or whistling sounds are largely through the acoustic optimization of the additional units avoided. Thus assembly of vibrating assemblies is now also on body sections with low dynamic rigidity possible.

An embodiment of the invention is shown in the drawing and is described below. Show it:

1 : a support bracket and an additional unit before assembly

2 : a support bracket with a different geometric contour than in 1

In the drawing, an arrangement is shown which is suitable for mounting and storing an additional unit in the engine compartment of a motor vehicle. This arrangement consists of a support bracket 1 , which is connected to the vehicle body (not shown in the drawing). In a preferred application, the carrier console 1 attached to the bulkhead of the vehicle body. On the carrier console 1 becomes the additional unit 2 stored. In the 1 and 2 are just two different geometrical configurations of a carrier console, for example 2 shown. The concrete contour of the bracket 2 is irrelevant in the present situation.

It is essential, however, that between the additional unit 2 and the vehicle body is provided with a double acoustic decoupling. This is achieved by using the additional unit 2 elastic on the support bracket 1 and the carrier console 1 in turn is mounted elastically on the vehicle body.

Preferably the carrier console 1 with at least one screw 3 screwed to the vehicle body. For this is on the carrier console 1 a breakthrough 4 designed by the screw 3 can be performed. On both sides of the breakthrough 4 becomes the shaft of the screw 3 each a sleeve-shaped rubber-elastic element 5 or 6 assigned. Consequently, there is an acoustic decoupling between the vehicle body and the carrier console at this point 1 reached. In addition to the support by means of the screw 3 it is advantageous that the carrier console 1 additionally with a rubber buffer 7 is supported on the vehicle body. The rubber buffer 7 is in a hollow 8th arranged on the carrier console 1 is designed. This will result in further acoustic decoupling of the carrier console at this point 1 reached.

The additional unit 2 comes with at least one screw 9 on the carrier console 1 screwed. The specific number of screws 9 is due to the design of the additional unit to be supported 2 certainly. In 1 a preferred application is shown, here the additional unit 2 is a valve block with four screws 9 on the carrier console 1 is stored. Regardless of the specific number of screws 9 the shaft of the screw (s) 9 guided by a sleeve-shaped assembly, the axial extension of which is a first rubber-elastic element 10 , an adapter disc 11 and a second rubber-elastic element 12 having. As a result, acoustic decoupling is also achieved at this point.

1

support bracket

2

additional unit

3

screw

4

breakthrough on carrier console

5

elastomeric element

6

elastomeric element

7

rubber buffers

8th

trough on carrier console

9

screw

10

elastomeric element

11

adapter disc

12

elastomeric element

Claims (6)

Arrangement for mounting and storing an additional unit in the engine compartment of a motor vehicle, consisting of a support bracket connected to the vehicle body, on which the additional unit is mounted with the interposition of elastic elements, characterized in that between the additional unit ( 2 ) and the vehicle body is provided with a double acoustic decoupling by the additional unit ( 2 ) elastic on the support bracket ( 1 ) and the carrier console ( 1 ) is mounted elastically on the vehicle body. Arrangement according to claim 1, characterized in that the carrier console ( 1 ) with at least one screw ( 3 ) is screwed onto the vehicle body, whereby in the carrier console ( 1 ) a breakthrough ( 4 ) through which the screw ( 3 ) and the shaft of the screw ( 3 ) on both faces of the opening ( 4 ) each a sleeve-shaped rubber-elastic element ( 5 ; 6 ) is assigned. Arrangement according to claims 1 and 2, characterized in that the carrier console ( 1 ) with a rubber buffer ( 7 ) is supported on the vehicle body, the support bracket ( 1 ) a hollow ( 8th ) is designed in which the rubber buffer ( 7 ) is arranged. Arrangement according to claim 1, characterized in that the additional unit ( 2 ) with at least one screw ( 9 ) to the carrier console ( 1 ) is screwed on, the shaft of the screw ( 9 ) is guided through a sleeve-shaped assembly, the axial extension of which is a first rubber-elastic element ( 10 ), an adapter disc ( 11 ) and a second rubber-elastic element ( 12 ) having. Arrangement according to claim 1, characterized indicates that the additional unit ( 2 ) is a valve block. Arrangement according to claim 1, characterized in that the carrier console ( 1 ) is attached to the bulkhead of the vehicle body.