Rule-based all-wheel drive PHEV torque distribution control method

Abstract

The invention discloses a rule-based all-wheel drive PHEV torque distribution control method. The method specifically comprises the following steps: step 1, determining the demand torque of a driver in stages; step 2, according to different demand torque of the driver, judging the current working mode of a vehicle; step 3, determining an optimal working interval of an engine and a power battery; and step 4, according to the current working mode of the vehicle, enabling the engine to work at an optimal fuel economic torque curve as a target, and distributing the torque of each power source of the vehicle power system. The difference between the efficient intervals of the power sources of the plug-in hybrid electric vehicle is comprehensively considered, the demand torque of the driver is reasonably distributed, on the premise that the vehicle dynamics and the power system constraint are met, the fuel economy of the vehicle is improved, and the emission load of the tail gas is reduced.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, in particular to a rule-based four-wheel drive PHEV torque distribution control method. Background technique [0002] Plug-in hybrid electric vehicles have become a research hotspot because of their long driving range and low fuel consumption and the advantages of zero-emission pure electric vehicles; The common basis of the power system, different forms of energy sources and their flexible flow directions highlight the necessity of vehicle energy management. How to comprehensively consider the differences in the high-efficiency ranges of the engine and the motor, and rationally distribute the torque to satisfy the power and Realizing the optimal control of vehicle energy efficiency under the premise of system constraints is the core issue of vehicle energy management; existing energy management strategies cannot give full play to the driving capabilities of each power source of hybri...

AI Technical Summary

Problems solved by technology

[0002] Plug-in hybrid electric vehicles have become a research hotspot because of their long driving range and low fuel consumption and the advantages of zero-emission pure electric vehicles; The common basis of the power system, different forms of energy sources and their flexible flow directions highlight the necessity of vehicle energy management. How to comprehensively consider the differences in the high-efficiency ranges of the engine and the motor, and rationally distribute the torque to satisfy the power and Realizing the optimal control of vehicle energy efficiency under the premise of system constraints is the core issue of vehicle energy management; existing energy management strategies cannot give full play to the driving capabilities of each power source of hybrid electric vehicles, resulting in reduced fuel economy and poor power performance of vehicles , the problem of increased fuel volume and exhaust emissions

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