Method for testing noises of hybrid power automobile

Abstract

The present invention discloses a method for testing noises of a hybrid power automobile. The method includes the steps as follows: a) selecting an automobile of a series-parallel type hybrid power automobile system as an object to be tested; b) measuring vibration accelerations: measuring vibration accelerations of an engine, a transmission, and a primary driver seat and a secondary driver seat through a 24-channel magnetic head recorder; c) measuring noise signals: measuring noise signals of a front left wheel, the outside of an automobile top of the primary driver seat, the outside of an exhausting port, the transmission and the engine; d) measuring revolving speeds of a generator and a motor by employing a Prius fault diagnosis apparatus; e) recording noise signals of positions corresponding to double ears of a primary driver, a position corresponding to a right ear of the secondary driver, and a position corresponding to a right ear of a passenger behind the primary driver; f) and performing a noise spectral analysis inside the automobile according to measurement data acquired from steps b) - e). The method can accurately confirm a noise excitation source and shorten a measurement period.

Description

technical field [0001] The invention relates to a noise testing method of an electric hybrid vehicle, which belongs to the technical field of noise measurement. Background technique [0002] During the normal operation of hybrid electric vehicles, the power source needs to be switched frequently, which indirectly produces frequent impact vibration noise. For traditional internal combustion engine vehicles, we can usually capture obvious order information in noise samples (such as 2, 4, 6, and 8th order noise of a 4-cylinder 4-stroke engine). However, in order to improve energy efficiency as much as possible in hybrid vehicles, the engine is usually turned off under low-speed conditions, so it is impossible to directly track the engine speed signal to analyze the noise spectrum in the vehicle, which brings certain difficulties to traditional test and analysis methods . Contents of the invention [0003] The technical problem solved by the invention is to overcome the defi...

AI Technical Summary

Problems solved by technology

However, in order to improve energy efficiency as much as possible in hybrid vehicles, the engine is usually turned off under low-speed conditions, so it is impossible to directly track the engine speed signal to analyze the noise spectrum in the vehicle, which brings certain difficulties to traditional test and analysis methods