Robustness optimization method of powertrain mount based on vehicle idling vibration performance

A powertrain and robustness technology, applied in the field of powertrain mount robustness optimization, can solve the problem of not being able to completely simulate the idling performance of the whole vehicle, and achieve improved idling vibration performance, reduced response amplitude, and reduced seating. The effect of chair vibration acceleration

Active Publication Date: 2021-06-04
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology

[0003] At present, in the design stage of the suspension system, the suspension stiffness scheme is mainly obtained through the stiffness matching of the suspension bushing and the analysis method of the passive side dynamic reaction force of the suspension. influence, it cannot completely and truly simulate the idling performance of the vehicle

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  • Robustness optimization method of powertrain mount based on vehicle idling vibration performance
  • Robustness optimization method of powertrain mount based on vehicle idling vibration performance
  • Robustness optimization method of powertrain mount based on vehicle idling vibration performance

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Embodiment Construction

[0041] In order to better illustrate the method of the present invention, the present invention will be further described below through an example of optimal design of the suspension of a certain vehicle in Changan, combined with tables and accompanying drawings.

[0042] Such as figure 1 The robustness optimization method of the powertrain mount based on the idling vibration performance of the vehicle shown includes:

[0043] Step 1: P-diagram analysis to determine the relevant parameters for the optimal design of the robustness of the mount system

[0044]There are many factors that cause the deviation of vehicle idle vibration performance, such as: time influence (liner attenuation and aging), external ambient temperature, interaction between various systems of the vehicle (suspension system change, tire pressure change, engine combustion deviation), suspension Setting system error (mounting size error, bolt pre-tightening force, etc.) and user usage. This embodiment main...

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Abstract

The invention discloses a powertrain mount robustness optimization method based on the idling vibration performance of a complete vehicle, comprising: P diagram analysis to determine relevant parameters for the robust optimization design of the mount system; building a complete vehicle NVH simulation analysis model, and performing Simulation and analysis of vehicle idling NVH performance; parametric modeling of mount installation position and mount bushing stiffness; DOE sampling calculation of mount installation position; establishment of radial basis function approximation model Ⅰ that meets accuracy requirements; mount mount installation Deterministic optimization and verification of the position; on the basis of the determined installation position of the mount, DOE sampling calculation of the stiffness of the mount bushing; establishment of a radial basis function approximation model II that meets the accuracy requirements; deterministic optimization of the stiffness of the mount bushing and verification; the robustness analysis and robustness optimization are carried out on the deterministic optimization results of the suspension bushing stiffness. The adoption of the invention can make the suspension scheme of the power assembly have good robustness, and ensure the high consistency of the idle vibration performance of the whole vehicle.

Description

technical field [0001] The invention belongs to the technical field of automobile NVH, and in particular relates to a method for optimizing the robustness of a powertrain mount based on the idling vibration performance of a complete vehicle. Background technique [0002] Automobile idling vibration performance is one of the key indicators for evaluating driving comfort, and has become the key performance that major domestic and foreign OEMs focus on in the product development process. The engine is the most important excitation source when the car is running at idle speed, and the vibration excitation force is transmitted to the body through the powertrain suspension system, thereby causing the body to vibrate. Among them, the design of the suspension system is related to the transmission effect of the engine excitation force to the body, which directly affects the vibration performance of the vehicle at idle speed. At present, domestic mount suppliers generally control the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/15G06F30/17G06F119/14
CPCY02T90/00
Inventor 李学亮许春铁苏永雷彭磊王卓
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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