A method and system for simulating engine noise of electric and hybrid vehicles

Abstract

The invention relates to a method and a system for simulating noise of engines of electric and hybrid vehicles. The method is characterized in that buzzer sound production circuits are additionally arranged on the electric vehicles and are connected into electric control systems, and CAN (controller area network) signals are sampled and acquired in real time by the aid of instruments and / or center control MCU (microprogrammed control units) after the electric vehicles are started, so that current electric vehicle state and vehicle speed signals in the CAN signals can be acquired, whether sound production conditions of the buzzer sound production circuits are met by the inputted vehicle state and vehicle speed signals or not can be judged by the instruments and / or the center control MCU, control signals can be computed and outputted to enable the buzzer sound production circuits by the instruments and / or the center control MCU if the sound production conditions are met, and sound can be outputted by buzzers; the buzzer sound production circuits can be switched off by the instruments and / or the center control MCU if the sound production conditions are not met. The method and the system have the advantages that the method and the system are easy to implement and low in cost and are stable and reliable, pedestrians can be effectively reminded of safety, and the electric vehicles can have driving assisting and safety reminding functions.

Description

technical field [0001] The invention belongs to the technical field of automobile safety, and in particular relates to a method and system for simulating engine noise of electric and hybrid vehicles, and in particular to an engine of a pure electric vehicle or a hybrid vehicle running at a low speed or reversing. Noise simulation method and system, so as to realize the driving assistance and safety reminder functions of electric and hybrid vehicles. Background technique [0002] Traditional automobiles use internal combustion engines, and their disadvantages are noise and exhaust. Rumbling noise and exhaust make drivers and pedestrians feel uncomfortable. The noise of traditional cars mainly has the following five aspects: engine noise, road noise, tire noise, wind noise, resonance noise and other aspects, and the higher the driving speed, the greater the noise. At present, many automobile factories in my country have manufactured pure electric vehicles and hybrid vehicles....

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the low noise emitted by electric vehicles in low-speed running and reversing state is not enough to warn pedestrians, and provides a simple and practical method and system for simulating engine noise of electric and hybrid vehicles. In this method, only Vehicle driving status and vehicle speed are not affected by external factors. The whole processing process is simple and easy to implement. The system involved only adds a buzzer sounding circuit on the basis of the existing hardware architecture of electric vehicles. The overall structure is simple and easy. Installation and use, low cost and stable and reliable, this system can make pedestrians more obvious and clearly feel the nearby electric vehicles, effectively remind pedestrians, and effectively realize the driving assistance and safety reminder functions of electric vehicles

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