PHEV four-drive torque distribution method based on ECMS

Abstract

The invention discloses a PHEV four-drive torque distribution method based on an ECMS. The method specifically comprises the following steps of step 1, calculating equivalent fuel consumption factorsaccording to the residual electric quantity of a power battery; step 2, calculating instantaneous total equivalent fuel consumption rate; step 3, converting all working torque combinations of an engine, a BSG motor and a rear axle motor into the working torque of a driving wheel, and determining the working torque range of each power source according to the working torque range of the driving wheel; step 4, solving the minimum value of the instantaneous total equivalent fuel consumption rate within the actual working torque range of each power source; and step 5, taking the working torque of each power source corresponding to the minimum instantaneous total equivalent fuel consumption rate as the PHEV optimal working torque for distribution. According to the method, the calculation processof the torque distribution is simplified, the torques of all power sources of a hybrid electric vehicle are reasonably distributed, so that the charge state of the power battery of the vehicle is kept balanced, the equivalent oil consumption is reduced, and the driving performance and riding comfort of the vehicle are improved.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, in particular to an ECMS-based PHEV four-wheel drive torque distribution method. Background technique [0002] The ECMS algorithm has been widely used in academic research, but the actual vehicle controller generally still adopts a rule-based energy management strategy. The calculation amount of the traditional ECMS algorithm is still too large for the vehicle controller, which needs to be further simplified; In addition, the irregular shifting strategy obtained according to the ECMS algorithm will cause frequent shifting, and the driving experience of the driver and the comfort of the passengers will be reduced. The traditional ECMS only considers the optimization of fuel consumption and fails to comprehensively consider the driving performance of the vehicle, so it is difficult to directly apply it to the actual situation. control. Contents of the invention [0003] The purpose o...

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Problems solved by technology

[0002] The ECMS algorithm has been widely used in academic research, but the actual vehicle controller generally still adopts a rule-based energy management strategy. The calculation amount of the traditional ECMS algorithm is still too large for the vehicle controller, which needs to be further simplified; In addition, the irregular shifting strategy obtained according to the ECMS algorithm will cause frequent shifting, and the driving experience of the driver and the comfort of the passengers will be reduced. The traditional ECMS only considers the optimization of fuel consumption and fails to comprehensively consider the driving performance of the vehicle, so it is difficult to directly apply it to the actual situation. control

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