Passenger vehicle hydraulic mount vibration characteristic identification method and system

Abstract

The invention provides a passenger vehicle hydraulic mount vibration characteristic identification method and system, and belongs to the technical field of automobile noise vibration. The method comprises the steps of sequentially setting a hydraulic mount to be in a normal installation state and a disconnection state, and respectively collecting first data and second data under an idling working condition to judge whether a transmission path of hums in a vehicle is the hydraulic mount or not; respectively setting the hydraulic mount to be in multiple different configuration states, and collecting multiple pieces of third data under the idling working condition so as to judge whether the corresponding configuration state is a problem state or not and whether the buzzing sound in the vehicle is caused by a corresponding component or not, wherein at least one component is changed in each configuration state. According to the method, the normal installation state of the hydraulic mount is compared with multiple test states, the transmission path of the hums in the vehicle is analyzed, the generation source of the hums in the vehicle is found, the test period is short, the analysis result is accurate, the working efficiency can be effectively improved, and the development period of the whole vehicle is shortened.

Description

technical field [0001] The invention relates to the technical field of automobile noise and vibration, in particular to a method and system for identifying vibration characteristics of a passenger car hydraulic mount. Background technique [0002] The powertrain and the road surface are the two main excitation sources of passenger cars. The vibration of the powertrain is transmitted to the vehicle body through the suspension system, causing the vibration of the vehicle body. The displacement excitation of the road surface is transmitted to the powertrain through the suspension system, causing the powertrain formed vibration. Therefore, the suspension system should play a two-way vibration isolation role, not only to isolate the vibration and impact of the road on the powertrain, but also to isolate the vibration transmitted from the powertrain to the body. [0003] In order to effectively attenuate low-frequency and large-amplitude vibrations caused by uneven road surfaces ...

AI Technical Summary

Problems solved by technology

[0009] Most of the current research methods are to adjust the structure of the hydraulic mount of the automobile powertrain from the aspects of simulation and design and manufacture, mainly to analyze the vibration characteristics of the overall structure, and to analyze the vibration characteristics of the internal structural components of the hydraulic mount and the specific vibration caused by it. There is no effective analysis and identification method for the vibration and noise problem, especially the humming sound in the car at idling state caused by the internal structural components of the hydraulic suspension (subjective evaluation of the noise sounds like a humming sound, the frequency of the humming sound in the car The range is 675Hz~950Hz), and there is no specific identification method

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