Acceleration pedal analytic control method and system of electric vehicle

Abstract

The invention provides an acceleration pedal analytic control method and a system of an electric vehicle. The acceleration pedal analytic control method comprises the following steps that the acceleration pedal depth, the vehicle speed and a power battery SOC are collected; motor driving coefficients corresponding to the acceleration pedal depth, the vehicle speed and the power battery SOC are acquired by querying a driving coefficient three dimensional query list according to the acceleration pedal depth, the vehicle speed and the power battery SOC; and target driving torque of the vehicle is determined according to the motor driving coefficients corresponding to the acceleration pedal depth, the vehicle speed and the power battery SOC. According to the acceleration pedal analytic control method, a power battery can be protected, meanwhile vehicle miles traveled is improved as much as possible, so that the vehicle is always in the best running state.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an analytical control method and system for an accelerator pedal of an electric vehicle. Background technique [0002] In the control system of electric vehicles, the analysis of the accelerator pedal is usually based on the accelerator pedal opening and vehicle speed to predict and analyze the driver's demand torque, and accordingly control the drive motor to drive the vehicle. At present, most electric vehicles on the market adopt multiple driving modes to meet the driver's driving needs for the vehicle, such as comfort mode, economy mode, sports mode and so on. In the control system of electric vehicles, in order to realize different driving modes on electric vehicles, the current common practice is to use different accelerator pedal analytical control methods to realize the driver's requirements for different driving modes under different driving mode requirements. However,...

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Problems solved by technology

[0004] However, according to the control strategy in the above scheme, when the driver still unconsciously accelerates rapidly when the SOC of the power battery is too low, the power battery will continue to output the maximum available discharge power. When the battery continues to work at the maximum discharge power, first It still has a certain impact on the life of the power battery, and the discharge efficiency of the power battery is too low at this time, which reduces the driving range a lot, which does not meet the needs of increasing the driving range and being able to go home to charge when the SOC of the power battery is too low.

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