Hybrid electric vehicle engine based on energy optimization and distribution method of motor torque

Abstract

The invention relates to a hybrid electric vehicle engine based on energy optimization and a distribution method of a motor torque, wherein the distribution method comprises the following steps: an off-line specific fuel consumption Map graph under all conditions is provided, so that the engine and the motor together take part in a requirement torque in response to driving; the motor and the engine will work in harmony under the same rotating speed so that their operating efficiency is optimized; a present state of charge (SOC) for a vehicle-mounted power battery, the engine torque and the motor torque are distributed according to the following situations; when SOC is more than a first preset value, the engine and the motor enter into a first distribution mode; when SOC is less than a second preset value, the engine and the motor enter into a second distribution mode, otherwise they keep a present operating status. The method is characterized in that performance advantages of the motor and the engine can be fully achieved, so that the system is always operated in a high-efficiency region, the energy consumption cost of the vehicle is reduced, the harmful gas is greatly reduced in emission, and it is beneficial to energy saving and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle control, and in particular relates to an energy optimization-based method for distributing torque between an engine and a motor of a hybrid electric vehicle. Background technique [0002] In the prior art, for a hybrid electric vehicle system that uses an engine and an electric motor to form a hybrid power source, there is no such patent document as to how to perform torque distribution and control between the engine and the electric motor in a hybrid technical solution. Therefore, it is necessary to provide a corresponding control method to reasonably distribute the torque between the engine and the motor, so as to give full play to the respective performance advantages of the engine and the motor, prolong their service life, and ensure the dynamic performance of the hybrid system as much as possible. Save fuel consumption as much as possible, so that the system always works in th...

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Problems solved by technology

[0002] In the prior art, for a hybrid vehicle system that uses an engine and an electric motor to form a hybrid power source, there is no such patent document as to how to perform torque distribution and control between the engine and the electric motor in the hybrid technical solution

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