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Working mode decision-making method and device for power split hybrid electric vehicle

A hybrid electric vehicle and working mode technology, applied in hybrid electric vehicles, motor vehicles, control devices, etc., can solve problems such as limited optimization effects, and achieve the effects of easy identification of working conditions, improved adaptability, and good nonlinear mapping capabilities

Active Publication Date: 2020-10-16
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This method uses thresholds to identify working conditions and switch modes. There are also certain human factors, and the optimization effect is limited.

Method used

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  • Working mode decision-making method and device for power split hybrid electric vehicle
  • Working mode decision-making method and device for power split hybrid electric vehicle
  • Working mode decision-making method and device for power split hybrid electric vehicle

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Embodiment 1

[0054] like figure 1 As shown, the present embodiment provides a method for decision-making of a working mode of a power-split hybrid electric vehicle, comprising the following steps:

[0055] Data acquisition step S1: from the power-split hybrid electric vehicle, acquire the latest operating condition segment of the vehicle and the current state parameters of the vehicle;

[0056] The latest vehicle operating condition segment refers to the latest vehicle speed segment of a fixed time length updated at a fixed time interval based on the vehicle speed signal at each moment;

[0057] The current state parameters of the vehicle include the required torque of the vehicle, the current vehicle speed, the SOC value of the power battery and the current working mode.

[0058] Operating condition identification step S2: Obtain the principal component score of the characteristic parameters of the latest operating condition segment of the vehicle through principal component analysis, an...

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Abstract

The invention relates to a working mode decision-making method and a device for a power split hybrid electric vehicle. The method comprises the following steps that (1) obtaining the latest working condition segment of a vehicle and the current state parameter of the vehicle; 2) obtaining a principal component score of the characteristic parameter of the latest working condition segment of the vehicle through a principal component analysis method, further calculating an Euclidean distance from the latest working condition segment to a preset clustering center of various working conditions, anddetermining a current driving working condition category; 3) normalizing the current state parameters of the vehicle by adopting the parameter normalization model of the corresponding category; and 4) loading the normalized parameters into the working mode decision sub-models of the corresponding types to decide a target working mode. Compared with the prior art, the influence of different working conditions is considered, the working mode decision sub-models under various working conditions are obtained through BP neural network training on the basis of the global optimal working mode decision sequence, solved through dynamic planning, under various typical working conditions, and the fuel economy of the automobile is improved.

Description

technical field [0001] The invention relates to the field of decision-making of a working mode of a hybrid electric vehicle, in particular to a method and device for decision-making of a working mode of a power-split hybrid electric vehicle. Background technique [0002] With the increasingly serious energy shortage and environmental pollution problems, countries have formulated a series of restrictive regulations on fuel economy and emissions for automobiles, and as time goes by, the regulations are becoming increasingly strict. In response to this trend, the research and development of hybrid vehicles has been one of the key points of the development of the entire automotive industry. As a typical hybrid electric vehicle, the power-split hybrid electric vehicle can realize double decoupling of the speed and torque of the power output end and the engine end, and has great energy-saving potential. [0003] A power-split hybrid electric vehicle has multiple power components ...

Claims

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Application Information

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IPC IPC(8): B60W20/15B60W20/20B60W40/00B60W50/00
CPCB60W20/20B60W40/00B60W50/00B60W2050/0034B60W2520/10B60W2520/105B60W20/15
Inventor 赵治国陈溢李豪迪范佳琦
Owner TONGJI UNIV
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