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Dynamic vibration absorber capable of improving NVH and matching method thereof

A technology of dynamic vibration absorber and matching method, which is applied in the direction of shock absorbers, instruments, shock absorbers, etc., can solve the problems of many processes, consume a lot of manpower and financial resources, and quickly solve unfavorable resonance problems, so as to achieve the effect of suppressing vibration

Active Publication Date: 2014-12-17
AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some systems in the vehicle are not linear, and the data obtained through test simulation may deviate from the actual, and there may be damping effects, which requires a series of processes such as design-test-test-retest, etc. There are many processes involved, and it consumes more human and financial resources.
At the same time, it also involves communication and coordination among OEMs, parts suppliers, and dynamic shock absorber suppliers, which is not conducive to the quick resolution of resonance problems.

Method used

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  • Dynamic vibration absorber capable of improving NVH and matching method thereof
  • Dynamic vibration absorber capable of improving NVH and matching method thereof
  • Dynamic vibration absorber capable of improving NVH and matching method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A dynamic shock absorber needs to be installed on the exhaust system of a certain model.

[0049] Such as image 3 As shown, the exhaust system includes a catalytic converter 15, a middle muffler 9 and a rear muffler 10. One end of the catalytic converter 14 is connected to the gas outlet end of the automobile engine through the first exhaust pipe 11, and the other end of the catalytic converter 14 is connected to the middle muffler 9. One end is connected by the second exhaust pipe 12, the other end of the middle muffler 9 is connected with an end of the rear muffler 10 by the third exhaust pipe 13, and the other end of the rear muffler 10 is connected with an exhaust tailpipe 14.

[0050] The matching method of the dynamic vibration absorber, the steps are as follows:

[0051] (1) Draw the different scale positions of the mass block 2 on the leaf spring 3 and the natural frequency table of the dynamic vibration absorber under different counterweights (as shown in Tab...

Embodiment 2

[0062] For the exhaust system of another vehicle type, the matching method of the present invention is used to match the dynamic vibration absorber. When the dynamic vibration absorber is not installed, the frequency is 24Hz, which is just within the engine excitation frequency range of 24-26Hz. There is a hidden danger of resonance. After the shock absorber, the frequency is reduced to 20.35Hz, effectively avoiding the engine excitation frequency.

[0063] To sum up, for different systems of the whole vehicle, such as exhaust system, steering system, suspension system, etc., there can be a general dynamic vibration absorber, only need to adopt the matching method of the present invention according to the natural frequency of different systems, Adjusting the position of the mass on the plate spring and the counterweight of the mass to obtain a matching dynamic vibration absorber can quickly and efficiently solve the resonance problem and has high application value.

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Abstract

The invention relates to a dynamic vibration absorber capable of improving NVH (Noise, Vibration and Harshness) and a matching method thereof. The dynamic vibration absorber comprises a connecting seat and a plurality of mass blocks; the dynamic vibration absorber further comprises a plate spring, a connecting post, and a fastening piece; one end of the plate spring is fixedly connected to the connecting seat, a sliding chute is further formed in the plate spring in the length direction thereof, the connecting post is detachably connected with the mass blocks, one end of the connecting post is arranged inside the sliding chute in a sliding manner along the sliding chute, and the fastening piece is connected with the connecting post and used for fixedly connecting the mass blocks onto the plate spring. The dynamic vibration absorber provided by the invention can ensure that the natural frequency of the dynamic vibration absorber is adjustable by adjusting the weights and the positions of the mass blocks, aiming at different systems of a whole vehicle, a universal dynamic vibration absorber can be available for damp matching, and an optimal scheme for vibration restraining can be found quickly.

Description

technical field [0001] The invention belongs to the field of automobile noise and vibration control, relates to an automobile part, in particular to a dynamic vibration absorber for improving NVH performance and a matching method thereof. Background technique [0002] During the NVH (NVH: Noise, Vibration and Harshness) test of the whole vehicle, when testing the exhaust system, steering system, suspension system and other subsystems, it is often proposed to install a dynamic vibration absorber for the resonance problem. improve proposals. Dynamic vibration absorbers are often provided by component manufacturers for different subsystems, and there are different design schemes for dynamic vibration absorbers dedicated to different subsystems. In this way, the NVH engineer proposes a design improvement plan to feedback the problem to the OEM, and then the OEM is responsible for contacting the supplier to provide a dedicated dynamic vibration absorber. The process is cumbersom...

Claims

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Application Information

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IPC IPC(8): F16F7/104G06F17/50
Inventor 房俊杰郑四发
Owner AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG
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