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Method of evaluating vehicle warm-up working condition NVH performance

A warm-up and working condition technology, applied in the field of vehicle development and performance matching, can solve the problems of less attention to NVH performance and greater impact on customer experience, to improve customer satisfaction, low cost, and improve the problem of excessive noise Effect

Active Publication Date: 2018-03-13
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology

[0002] Due to the duration of the warm-up condition and the harsh conditions such as the requirement of low-temperature NVH laboratories, people currently pay little attention to the NVH performance of the warm-up condition, but it has a greater impact on customer experience

Method used

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  • Method of evaluating vehicle warm-up working condition NVH performance
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  • Method of evaluating vehicle warm-up working condition NVH performance

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 As shown, a one-to-two OBD connection line 3 is drawn from the vehicle OBD interface 1, and the one-to-two OBD connection line 3 is respectively connected to the OBD connection line interface I31 and the OBD connection line interface II32. The OBD cable interface I31 is connected to the tachometer 4 for collecting the engine speed signal and transmitting the engine speed signal to the data acquisition system 6 . The OBD connection line interface II 32 is connected to the diagnostic instrument 5, which is convenient for adjusting the engine speed with the diagnostic instrument 5. A microphone 2 is arranged in the vehicle to collect noise signals at different rotational speeds and send them to the data acquisition system 6, which analyzes the size and composition of the noise.

[0024] A method for evaluating the NVH per...

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Abstract

A method of evaluating a vehicle warm-up working condition NVH performance relates to the vehicle development performance matching field, and comprises the rotating speed fluctuation analysis, the vehicle body resonance analysis, the warm-up state analysis and the rotating speed noise component analysis. The rotating speed fluctuation analysis is to acquire a rotating speed signal of an engine anddetermine whether the rotating speed fluctuation of the engine is less than 40 rpm and whether the rotating speed fluctuation of the engine has the regularity, the vehicle body resonance analysis isto determine that the noise obviously rises to an engine rotating speed section corresponding to the noise peak, namely a vehicle body resonance rotating speed section, according to a rotating speed-noise sweep frequency diagram, the warm-up state analysis is to check whether the warm-up rotating speed is overlapped with the vehicle body resonance rotating speed section, and the rotating speed noise component analysis is to analyze a noise energy spectrum and further check a noise source. The present invention mainly provides the evaluation method for solving the idling warm-up working condition noise from the aspects of structure and locomotive matching, the method is suitable for both the development of new vehicle type and the later noise optimization, can effectively improve the problem of louder noise on the warm-up working condition, and enables the client satisfaction degree to be improved.

Description

technical field [0001] The invention relates to the field of vehicle development performance matching, and mainly relates to a method for evaluating the NVH performance of a vehicle warm-up condition. Background technique [0002] Due to the duration of the warm-up condition and the harsh conditions such as the requirement of low-temperature NVH laboratories, people currently pay little attention to the NVH performance of the warm-up condition, but it has a greater impact on customer experience. According to the data of some research companies, about 30% of customers complain about warm-up conditions, which is comparable to the complaints about acceleration and high-speed conditions. [0003] Therefore, it is necessary to study a method to evaluate the NVH performance of the vehicle warm-up condition. Contents of the invention [0004] The purpose of the present invention is to provide a method for evaluating the NVH performance of the whole vehicle warm-up condition, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00
Inventor 唐朝阳杨少波杨金才张亮辜庆伟周晓强李祥胡刚
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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