Acceleration control method of electric automobile

Abstract

The invention discloses an acceleration control method of an electric vehicle, and relates to the technical field of new energy vehicles, and the acceleration control method comprises the following steps: S1, the vehicle is selected to enter a power mode or an economic mode according to the accelerator opening A, the current vehicle speed V and the current acceleration a in the driving process ofthe vehicle; s2, the acceleration is not limited when the power mode is entered; and S3, when the vehicle enters the economic mode, the full-speed range of the vehicle is divided into a plurality of vehicle speed intervals, acceleration limit values are set in the vehicle speed intervals, and the output torque of a motor is controlled according to the acceleration limit value in the vehicle speedinterval where the current vehicle speed V is located so as to realize segmental limitation of the acceleration. When the vehicle enters the economic mode, the full-speed range is segmented, and the acceleration limit value of each segment is set, so that the acceleration of the vehicle is gentler, the overall performance is more excellent, the riding comfort of people is fully guaranteed, and thesafety and economy of the vehicle are effectively improved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an acceleration control method for electric vehicles. Background technique [0002] With the rapid development of new energy vehicles, people have higher requirements for the ride comfort of electric vehicles. Because of the characteristics of the drive motor, electric vehicles have better acceleration performance at the start and low-speed stages, but each driver's driving style is different. If there is a large acceleration during the driving of an electric vehicle, it will make the driver and passengers feel uncomfortable. , and there is a greater security risk. Therefore, limiting the acceleration of the electric vehicle during driving can effectively improve the stability and safety of the electric vehicle, thereby effectively improving people's riding comfort. [0003] The Chinese patent with application number CN106740271A discloses a method and device for li...

AI Technical Summary

Problems solved by technology

[0004] Although this technical method can effectively prevent the electric vehicle from overspeeding, it only uses a single vehicle speed and acceleration value as the basis for judgment in the control process, without fully considering the driving environment of the electric vehicle, and does not fully evaluate the acceleration of each speed segment during the driving process. Perform constrained optimization

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