Dynamic coordination control method for high acceleration process of hybrid vehicle

Abstract

The invention discloses a dynamic coordination control method for a high acceleration process of a hybrid vehicle, which comprises the following steps: (1) determining an engine target torque Te'(m) and a target torque Tm'(m) of a motor system, which are distributed in a steady state; (2) judging whether entering a dynamic coordination process of high acceleration, if so, entering a step (3), if not, returning to the step (1); and (3) performing dynamic coordination according to an engine torque command Te(m-1) at a former moment, the engine target torque Te'(m) and the target torque Tm'(m) of the motor system, obtained by an energy management policy so as to obtain an engine torque command value Te(m) and a torque command value Tm(m) of the motor system; and the method of the invention fully utilizes the compensation capability of the motor, guarantees the dynamic property of the high acceleration process, effectively reduces the engine concentration and improves the economical efficiency of the high acceleration process.

Description

technical field [0001] The invention relates to the technical field of hybrid vehicle control, in particular to a dynamic coordination control method of a hybrid vehicle during a large acceleration process. Background technique [0002] Hybrid vehicles include hybrid passenger cars, hybrid buses, and hybrid construction machinery, etc., which use two or more energy sources. The power sources used include: internal combustion engines, electric motors, batteries, hydrogen, fuel cells, etc. , is one of the important ways to improve vehicle energy saving and environmental protection performance. Most of the current hybrid vehicles are driven by internal combustion engines and electric motors, and the energy comes from gasoline and batteries. This kind of hybrid vehicles is called hybrid electric vehicle (Hybridelectric vehicle for short HEV). [0003] The current hybrid vehicle requires the engine to provide the main driving force during the high acceleration process, and the e...

AI Technical Summary

Problems solved by technology

[0005] However, both approaches have inherent flaws

The control method (method 1) that limits the rise of the engine torque command value with a small slope can improve the fuel economy of the engine torque rise process, but the power of the vehicle is poor

The control method (method 2) that does not limit the rising slope of the engine torque command value can ensure the power performance of the vehicle, but because the engine needs to be accelerated and enriched, the fuel economy is poor

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