Method and device for torque control of hybrid electric vehicle and hybrid electric vehicle

Abstract

The invention discloses a method and device for torque control of a hybrid electric vehicle and a hybrid electric vehicle. The invention relates to the field of vehicle control. The method includes: obtaining the required torque at the wheel end; combining the required torque at the wheel end, power system parameters and The power consumption demand of high-voltage accessories determines the target operation mode. The target operation mode is a mode that meets the current vehicle drive power requirements and the power consumption requirements of high-voltage accessories of the vehicle; in the target operation mode, the respective torques of the engine and the drive motor are controlled so that the hybrid The power car achieves the target power economy. The torque control method of the embodiment of the present invention is beneficial to improve the economical efficiency of the whole vehicle and at the same time give priority to satisfying the torque demanded by the wheel ends, that is, the torque demanded by the driver. And it has high modularization and generalization, a wide range of applications, and high practicability.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a method and device for torque control of a hybrid electric vehicle and a hybrid electric vehicle. Background technique [0002] A hybrid vehicle refers to a vehicle driven by a hybrid power system. A hybrid power system refers to a system that consists of two or more power sources with different working principles and combines different power sources to drive the vehicle. The purpose of the hybrid vehicle is to make use of the respective strengths of the engine and the drive motor to make up for the requirements of economy, emission and driving range that cannot be achieved by a single power source, and has a good application prospect. [0003] At present, according to the general hybrid system classification, the plug-in hybrid is a strong hybrid system because of the high energy of the power battery, and the power of the drive motor accounts for a large proportion of the total p...

AI Technical Summary

Problems solved by technology

[0004] However, whether the current hybrid vehicles are in pure electric mode or hybrid mode, the torque of the engine and the drive motor is mostly determined by the speed of the vehicle and the level of battery SOC. Therefore, the torque control is rough and cannot be timely Respond to torque demand, and the engine can rarely work in the optimal efficiency range, resulting in poor power economy and drivability of the vehicle, and poor car experience for drivers and passengers

Images