A power distribution control method for a hybrid electric vehicle
A hybrid vehicle, power distribution technology, used in hybrid vehicles, motor vehicles, transportation and packaging, etc.
Active Publication Date: 2021-12-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0004] The main purpose of the present invention is to provide a hybrid electric vehicle power distribution control method based on prediction of operating conditions in a finite time domain, so as to solve the limitation of off-line optimization of fuel consumption control strategy, the control method uses finite time domain dynamic programming as the control strategy, Dynamic planning is carried out for each moment in the forecast time domain, which can fully mine the forecast information, so as to achieve a good optimization effect
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[0047] Considering that the engine and motor are complex highly nonlinear systems, it is impossible to determine the distribution of operating points at the next moment based on the operating points at the previous moment. In order to optimize the fuel economy of the whole vehicle while satisfying the power performance, the present invention performs dynamic programming in combination with prediction information.
[0048] Here, the prediction information is mainly the prediction of the working conditions, and the prediction information such as the torque or rotational speed required by each component in the prediction time domain is solved according to the prediction results of the working conditions. In this way, the optimal operating points that the engine and motor need to achieve in the future time domain can be determined, so that the operating points of the engine and motor can be distributed in the vicinity of the high-efficiency area of the predicted time domain in ad...
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The invention discloses a power distribution control method of a hybrid electric vehicle. The method comprises: clustering by using the KNN method according to the speed characteristics, and identifying the corresponding speed pattern; according to the speed pattern recognition result, using the corresponding SVR prediction model to predict Car speed prediction; according to the shift speed of the dual-mode hybrid hybrid vehicle, judge the gear shifted at each moment in the prediction time domain; solve each control according to the transmission mode of the hybrid vehicle at the gear in the prediction time domain The variable control boundary and the input signal of the VCU of the whole vehicle; using the dynamic programming method in the finite time domain, using the input signal of the VCU at the sampling time and the prediction information in the prediction time domain, determine the optimization of the tth to (t+1)s at any time in the prediction time domain Energy management strategy to determine the control variables of each power component.
Description
technical field [0001] The invention relates to a power distribution control method of a hybrid electric vehicle, in particular to a power distribution control method of a hybrid electric vehicle based on prediction of working conditions in a limited time domain. Background technique [0002] With the city's emphasis on environmental protection, new energy vehicles are gradually entering the market. New energy vehicles on the market are mainly divided into hybrid vehicles and pure electric vehicles. Pure electric vehicles have been unable to be widely promoted due to battery life and endurance issues, and hybrid vehicles are accepted by consumers as a comprehensive product of traditional vehicles and pure electric vehicles. The engine is the main energy source, and the battery is another energy source that is linked with the motor to adjust the engine operating point, so that the engine can work in the best fuel consumption area, and the battery can recover part of the brak...
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IPC IPC(8): B60W10/06B60W10/08B60W20/00B60W40/00B60W40/105
CPCB60W10/06B60W10/08B60W20/00B60W40/00B60W40/105Y02T10/62Y02T10/84
Inventor 王伟达项昌乐王燕勤刘亮邱文伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY