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Method for evaluating vehicle NVH performance attenuation of internal combustion engine

An evaluation method and technology of internal combustion engine, applied in the field of vehicle NVH, can solve problems such as the reduction of vehicle NVH performance, and achieve the effect of improving R&D efficiency

Inactive Publication Date: 2018-06-29
CHONGQING CHANGAN AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

Before the delivery of a new car, its NVH performance is at the best stage. However, as the mileage of the vehicle continues to increase, it will be affected by factors such as the use environment, structural variation, and material performance aging, which will lead to continuous degradation of the NVH performance of the car.

Method used

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  • Method for evaluating vehicle NVH performance attenuation of internal combustion engine
  • Method for evaluating vehicle NVH performance attenuation of internal combustion engine
  • Method for evaluating vehicle NVH performance attenuation of internal combustion engine

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] refer to figure 1 , perform NVH performance attenuation assessment according to the flow chart;

[0026] A: Select a mass-produced new car with a gasoline engine, and conduct a subjective evaluation of NVH performance. There are no abnormal noises and other faults. If there are abnormal noises and other faults, re-select a mass-produced new car for evaluation until it is qualified;

[0027] B: Carry out NVH tests on the initial state of the new car at startup, idle speed, acceleration, constant speed, and coasting conditions, and record the noise data next to the driver's right ear;

[0028] C: The vehicle has passed a road test of 100,000 kilometers, of which urban road conditions account for 15%, high-speed road conditions account for 60%, urban-rural combined road conditions account for 15%, and mountain road conditions account for 10%;

[0029] D: Carry ou...

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Abstract

The invention provides a method for evaluating vehicle NVH performance attenuation of an internal combustion engine. According to the method, the vehicle NVH performance attenuation condition under various working conditions of vehicle idling, acceleration, high-speed constant speed, sliding and the like can be evaluated, and corresponding engineers are guided according to the attenuation degreesof different working conditions to analyze and research automobile vibration and noise change law and characteristics, so that the engineers are guided to discover key factors influencing automobile vibration and noise as well as the variation difference after combined action of various influence factors on vibration and noise quality of parts and the system, and the engineering research and development efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle NVH, in particular to a method for evaluating NVH performance attenuation of an internal combustion engine vehicle. Background technique [0002] Automobile NVH performance is one of the important indicators of automobile comfort, which is easy to cause complaints from users. New car users are often satisfied with the NVH performance in the initial state of the vehicle, and OEMs check and accept the NVH performance in the new car state. Before the delivery of a new car, its NVH performance is at the best stage. However, as the mileage of the vehicle continues to increase, it will be affected by factors such as the use environment, structural variation, and material performance aging, which will lead to continuous degradation of the NVH performance of the car. . As users have higher and higher requirements for automotive NVH performance, NVH performance attenuation has gradually become the resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 晏国强靳红英
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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