Torque control optimization method of electric vehicle based on driving mode

Abstract

The invention discloses a torque control optimization method of an electric vehicle based on a driving mode, which is characterized in that the driving mode is firstly defined, and the method specifically comprises the following steps: 101, disassembling common driving working conditions including ejection starting, crawling, accelerator stepping acceleration, accelerator loosening sliding, brake stepping deceleration, cruise acceleration and deceleration and driving mode switching in each working condition; 102, splitting functions of the torque chain according to working conditions; 103, under different driving modes, involving the different driving modes in each torque chain link of torque chain function splitting, and optimizing torque control logic; and 104, calibrating and optimizing the parameters in all the control. According to the method, factors of influence of a driving mode on the torque chain are fully considered, and an integral framework intervening in the torque chain is designed; a sufficient conversion mechanism is achieved for the torque characteristics of the electric vehicle, the requirements of different drivers are met, and meanwhile, torque output is smoother and the driving feeling is better in combination with the driving working condition during different modes and mode switching.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle torque control optimization method based on a driving mode. Background technique [0002] There are many current user driving modes of the vehicle, such as ECO / NORMAL / SPORT mode, which correspond to different accelerator-driving torques, such as a torque filtering method and system for electric vehicles disclosed in patent application 201711138829.8, and the electric vehicle. The method includes the following steps: obtaining the torque gradient filter limit corresponding to the vehicle in the current driving mode; performing gradient limit filter processing on the total demand torque of the vehicle at the current moment according to the torque gradient filter limit to obtain the first torque; Perform first-order inertial filtering to obtain the filtered total demand torque. [0003] Another example is a driving mode jump control method, system and ...

AI Technical Summary

Problems solved by technology

[0004] However, its current design method is basically based on the idea of ​​traditional oil vehicles, modifying the required torque corresponding to different throttles, coupled with the slow torque output of traditional vehicles, the driving feeling brought by different driving modes has a certain degree of differentiation and driving comfort. limitations, and the torque intervention of associated components in the torque chain does not distinguish between different driving modes

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