Single pedal mode control method of vehicle

Abstract

The invention relates to the technical field of vehicle control, in particular to a single pedal mode control method of a vehicle. The method comprises the steps: a single pedal mode control Map is constructed with the balance driving force of a vehicle in each vehicle speed section as the Z axis, the accelerator pedal opening degree as the Y axis and the current vehicle speed as the X axis; an exit threshold value K% of the single pedal mode control Map associated accelerator pedal opening degree is set; if the opening degree of the accelerator pedal is smaller than K%, the torque value of the single pedal mode control Map serves as the control torque of the single pedal mode; and if the accelerator pedal opening degree is larger than or equal to K%, the single-pedal mode is quitted, themaximum output torque corresponding to the current accelerator pedal opening degree is calculated through a normal driving algorithm according to the motor external characteristic curve, and the maximum output torque serves as the control torque of the vehicle. By means of the method, the single pedal mode is ensured to be quitted stably and rapidly when the urgent acceleration request of the driver is detected, corresponding driving force is provided to achieve driving actions such as acceleration overtaking or urgent avoidance, and controllability and safety of the vehicle are guaranteed.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a single-pedal mode control method for a vehicle. Background technique [0002] Regenerative braking energy recovery is a significant advantage of new energy vehicles and an important way to improve cruising range. There are two energy recovery methods for new energy vehicles. One is to let the vehicle coast by releasing the accelerator pedal during driving to recover energy from coasting; the other is to step on the brake pedal during driving to recover braking energy. One-pedal mode (OPM), as the name implies, uses one pedal (accelerator pedal) to control the normal driving of the vehicle. Depress the accelerator pedal to control the vehicle to accelerate, and release the accelerator pedal to decelerate the vehicle with the braking force provided by coasting energy recovery. In this way, the vehicle can fully recover energy during driving, improve the cruising range, ...

AI Technical Summary

Problems solved by technology

Disadvantages of this type of method: the energy recovery intervention conditions are not related to the real-time state of the vehicle and the recovery torque is too large, causing the vehicle to enter the energy recovery abruptly, and the acceleration and deceleration fluctuate greatly, resulting in uncomfortable driving experience such as dizziness

In addition, some control methods blindly pursue greater energy recovery, which will cause the driver to fail to provide the maximum driving force quickly when the driver needs to overtake the acceleration or accelerate to avoid actions, which may bring safety hazards

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