Noise evaluation method for automobile generator under finished automobile state
A technology for vehicle status and evaluation methods, applied in the measurement of ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve the problem of not having a unified evaluation method and method, and achieve strong correlation, accurate judgment, and convenient processing. Effect
Active Publication Date: 2012-03-28
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology
For vehicle generators whose noise basically meets the requirements in the vehicle state, how to quantitatively evaluate them with comprehensive objective parameters currently does not have a unified evaluation means and method
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Embodiment 1
[0035] The evaluation method of vehicle generator noise under the vehicle state of the present embodiment comprises the following steps:
[0036] The first step is to place the vehicle in the center of the measurement site, put the transmission in neutral, and tighten the hand brake; the hood, windows and doors should be closed, and the air conditioning mode should be adjusted to external circulation; the adjustable seat should be adjusted to horizontal and vertical in the middle. If the backrest of the seat is also adjustable, it should be placed in the middle of the adjustment angle as much as possible, and the ear noise at the right ear of the driver in the test car should be tested.
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The invention discloses a noise evaluation method for an automobile generator under a finished automobile state. The noise evaluation method comprises the following steps: first, preparing test conditions; second, testing idle noise; third, testing fast acceleration / deceleration noise; fourth, testing stationary noise under fixed rotational speed; fifth, processing tested noise data; and finally,evaluating noise of the automobile generator. The invention has the characteristics of simplicity in operation, convenience in processing, accuracy in judgment, high relevance between subjective evaluation and objective evaluation, and the like, and is suitable for noise evaluation of the automobile generator under the finished automobile state.
Description
technical field [0001] The invention belongs to a method for testing automobile vibration and noise, and in particular relates to an evaluation method for the noise of a vehicle generator in a complete vehicle state. Background technique [0002] Automobile generators are often one of the main noise sources of vehicles, and the noise generated by them shows obvious order characteristics. Since the vehicle generator is installed on the engine and is driven by the belt pulley, it cannot be operated independently. It is difficult to reflect the level of noise in the car through objective test data, and it is difficult to propose quantitative indicators. At the same time, the noise of the vehicle generator may behave inconsistently when the vehicle is accelerating, decelerating or running at a constant speed. It is necessary to evaluate two (three) working conditions separately and combine them with the overall noise performance of the vehicle to comprehensively explain whethe...
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IPC IPC(8): G01H17/00
Inventor 徐海峰周维超李伟赵勤石化玉陈光琼
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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