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In-vehicle engine order sound analysis method and electric vehicle active sound making system

An analysis method and engine technology, applied in the direction of vehicle components, sound signal devices, signal devices, etc., can solve problems such as the method and basis for formulating control strategies without detailed discussion

Active Publication Date: 2020-02-18
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to make up for the lack of feedback sound perception in electric vehicles, many scholars have carried out research on the sound control method of active sound technology, and generally proposed a sound amplitude control strategy with the accelerator pedal opening as input, but none of them discussed the control strategy in detail. Formulate methods and basis

Method used

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  • In-vehicle engine order sound analysis method and electric vehicle active sound making system
  • In-vehicle engine order sound analysis method and electric vehicle active sound making system
  • In-vehicle engine order sound analysis method and electric vehicle active sound making system

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Embodiment 1

[0059] This embodiment discloses a method for testing and analyzing the dynamic change of engine order sound in a vehicle, which includes the following steps:

[0060] S1. Obtain the first variation curve of the engine order sound amplitude in the vehicle with the engine speed when accelerating at each opening of the accelerator pedal;

[0061] S2. Performing trend analysis on the first change curve, and summarizing, to obtain a general chart of trend changes under each working condition;

[0062] S3. Select the engine speed range where the engine order sound amplitude changes stably, and analyze the second variation curve of the engine order sound amplitude in the vehicle with the accelerator pedal opening at different engine speeds in this interval;

[0063] S4. Obtain a third variation curve of the engine output power varying with the opening of the accelerator pedal at different engine speeds;

[0064] S5, define engine output power load ratio η P is the engine output po...

Embodiment 2

[0067] This embodiment discloses a method for testing and analyzing the dynamic change of engine order sound in a vehicle, including the following steps:

[0068] S01. Preparations for the test of engine order sound in the vehicle and the main dynamic characteristic parameters of the vehicle; specifically, on the internal combustion engine test sample vehicle, arrange a microphone near the driver's right ear, and at the same time arrange a vehicle speed sensor and accelerator pedal opening on the test sample vehicle sensor, engine speed sensor and engine torque sensor. And the above-mentioned test devices are connected to the unified data acquisition front-end test device, so as to ensure the synchronous collection of these test signals and the setting of the sampling frequency. The sound in the car is collected by the microphone arranged near the driver's right ear, the vehicle speed is collected by the vehicle speed sensor, the opening of the accelerator pedal is collected b...

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Abstract

The invention relates to the technical field of in-vehicle engine order sound, and discloses an in-vehicle engine order sound analysis method. The in-vehicle engine order sound analysis method comprises the following steps of acquiring a first change curve of in-vehicle engine order sound amplitudes changing as the rotating speed of an engine changes during accelerating driving at various degreesof opening of an accelerator pedal; carrying out trend analysis on the first change curve, and obtaining a trend change general graph; selecting a stably changing rotating speed range, and analyzing asecond change curve of sound amplitudes changing as the opening degree of the accelerator pedal changes within the range; acquiring a third change curve of engine output power changing as the openingdegree of the accelerator pedal changes under different rotating speeds; and defining an engine output power load ratio as the ratio between the engine output power at a certain accelerator pedal opening degree and engine output power under the 100% accelerator pedal opening degree, and working out a fourth change curve of order sound amplitude trends changing as the load ratio changes under different rotating speeds within an engine rotating speed range with stable engine order sound amplitude changes.

Description

technical field [0001] The invention relates to the technical field of in-vehicle engine order sound, in particular to an analysis method for in-vehicle engine order sound and an active sounding system for an electric vehicle. Background technique [0002] For traditional internal combustion engine vehicles, the engine order sound in the vehicle has a very important impact on the subjective perception of the sound quality in the vehicle during dynamic driving. Dynamic changes, wherein changes in the opening of the accelerator pedal can very well reflect the dynamic changes in the amplitude of the engine order sound in the car. When performing a constant speed driving operation, the driver slowly depresses the accelerator pedal until the driving force produced at a certain constant accelerator pedal opening is just equal to all the driving resistance of the vehicle at a certain speed, and the vehicle will keep running at a constant speed. The opening of the accelerator pedal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60Q5/00
CPCB60Q5/008
Inventor 曹蕴涛刘英杰岡龍祐汤乐超马宁
Owner CHINA FIRST AUTOMOBILE
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