Torque demand analyzing method for optimal power of parallel plug-in hybrid electric vehicle

Abstract

The invention discloses a torque demand analyzing method for optimal power of a parallel plug-in hybrid electric vehicle. The torque demand analyzing method comprises the steps that firstly, work modes where the whole vehicle is located are judged, and the whole vehicle output torque is solved correspondingly according to the different working modes; by solving battery demand power, whether the battery demand power is limited by battery maximum discharge power or not is judged, if the battery demand power is not limited by the battery maximum discharge power, two motors output corresponding maximum torque under the respective rotating speed, and the whole vehicle output torque is obtained by coupling with engine torque; otherwise, the torque of the two motors are redistributed through a two-dimensional torque traversal matrix of the main motor and the auxiliary motor, the engine torque is coupled, and thus total output torque of the whole vehicle is maximum under the condition that limitation of the battery maximum discharge power is released. According to the torque demand analyzing method, based on the two-dimensional torque traversal matrix of the main motor and the auxiliary motor, the obtained total output torque is the theoretical maximum value which can be output by the vehicle at all vehicle speeds, and power performance and driving experience are improved.

Description

Technical field [0001] The invention belongs to the technical field of pure electric vehicles, and in particular relates to a torque demand analysis method for optimal power of a parallel dual-drive motor plug-in hybrid electric vehicle. Background technique [0002] As energy and environmental issues become increasingly prominent, energy-saving and new energy vehicles have attracted more and more attention from governments and people of various countries. As a new energy vehicle, plug-in hybrid electric vehicles have the advantages of pure electric vehicles and traditional gasoline-electric hybrid vehicles. Compared with pure electric vehicles, they have better dynamics and higher cruising range. More use of electric energy to achieve short-distance zero emission, so it has become the most promising new energy vehicle. Plug-in hybrid electric vehicles equipped with dual-drive motors are extremely dynamic and have become the key development goals of many auto companies. [0003] ...

AI Technical Summary

Problems solved by technology

A torque demand analysis method for the optimal power of a plug-in hybrid electric vehicle with parallel dual drive motors fully considers all driving modes and optimizes the power coupling output among three power sources based on a gearbox. Improving the power of plug-in hybrid electric vehicles with multiple power sources provides a good reference basis, and there are no related inventions in this field

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