Hybrid electrical vehicle power distribution control algorithm

Abstract

The invention discloses a hybrid electrical vehicle power distribution control algorithm. The hybrid electrical vehicle power distribution control algorithm comprises the following steps of comparinga requested HCU target torque sent by a HCU with actual torque of a motor at the moment, and selecting maximum values through a value function, namely max(HCU target torque, actual torque of an engine) to obtain the maximum value of the HCU target torque and the maximum value of the actual torque of the motor; multiplying the actual torque of the engine by a clutch position correction coefficient;then subtracting the corrected actual torque of the engine from the maximum torque obtained in the S1; and then multiplying a first value of the maximum torque minus the corrected actual torque of the engine by the current gear speed ratio of a front axle to obtain a second value, multiplying the second value by a main speed reducing ratio to obtain a third value, and finally dividing the third value by the current gear speed ratio of a rear axle to obtain the torque with which the rear axle needs to be compensated at the moment. In a hybrid electrical vehicle type, two types of power exist,and the two types of power need to be completely coupled so that through the algorithm, the torque of the engine and the motor in the electricity-oil switching or oil-electricity switching process canbe reasonably distributed, coupling of the oil-electricity two-kind power is facilitated, and smoothness is realized.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle power, and in particular relates to a hybrid electric vehicle power distribution control algorithm. Background technique [0002] Hybrid Electrical Vehicle (HEV) refers to a vehicle that is equipped with two power sources at the same time—thermal power source (generated by a traditional gasoline engine or diesel engine) and electric power source (battery and electric motor). By using electric motors on hybrid electric vehicles, the power system can be flexibly adjusted according to the actual operating conditions of the vehicle, while the engine keeps working in the area with the best overall performance, thereby reducing fuel consumption and emissions. Hybrid vehicles have high fuel economy performance and superior driving performance. The engines of hybrid vehicles use fuel, and when starting and accelerating, due to the assistance of electric motors, fuel consumption can be redu...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a hybrid electric vehicle power distribution control algorithm to solve the above-mentioned background technology that under different gears and speed ratios, the actual torque output of the engine and the motor is different. If the torque obtained by subtracting the actual torque fed back by the MCU from the requested torque is used as the target torque of the engine, there will be power interruption or frustration during the electric oil cutting process, and the ride comfort and power of the vehicle will be poor.

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