Torque control method and device for hybrid electric vehicle and hybrid electric vehicle

Abstract

The invention discloses a hybrid electric vehicle torque control method and device and a hybrid electric vehicle, and relates to the field of vehicle control. The method includes: acquiring the wheelend demand torque; determining a target operation mode in combination with the wheel end demand torque, the power system parameters and the high-voltage accessory power consumption demand, the targetoperation mode being a mode meeting the current whole vehicle driving power demand and the whole vehicle high-voltage accessory power consumption demand; and in the target operation mode, controllingthe torque of the engine and the torque of the drive motor so that the hybrid electric vehicle can achieve the target power economy. The torque control method provided by the embodiment of the invention is beneficial to improving the economy of the whole vehicle, and preferentially meets the wheel end required torque, namely the required torque of a driver. In addition, high modularization and universalization are achieved, the application range is wide, and high practicability is achieved.

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 is composed of two or more power sources with different working principles and combines different power sources to drive the vehicle. The purpose of the hybrid electric 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 mileage that cannot be met by a single power source, and has a good application prospect. [0003] At present, according to the general classification of hybrid power systems, plug-in hybrid power has a relatively high power battery energy, and the power of the drive motor accounts for a large proportion of the overall power of the powe...

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

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