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A working mode decision method and device for a power-split hybrid electric vehicle

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

Active Publication Date: 2021-09-03
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A working mode decision method and device for a power-split hybrid electric vehicle
  • A working mode decision method and device for a power-split hybrid electric vehicle
  • A working mode decision method and device for a power-split hybrid electric vehicle

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Embodiment 1

[0054] Such as 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,...

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Abstract

The invention relates to a method and device for decision-making of a working mode of a power-split hybrid electric vehicle. The method includes the following steps: 1) Obtaining the latest working condition segment of the vehicle and the current state parameters of the vehicle; 2) Obtaining the latest working condition of the vehicle through principal component analysis The principal component score of the segment characteristic parameters, and then calculate the Euclidean distance from the latest operating condition segment to the preset clustering centers of various operating conditions, and determine the current driving condition category; 3) adopt the parameter normalization model of the corresponding category, Perform normalization processing on the current state parameters of the vehicle; 4) load the normalized parameters into the corresponding category of working mode decision sub-models, and decide the target working mode. Compared with the prior art, the present invention takes into account the influence of different working conditions, and based on the global optimal working mode decision-making sequence under various typical working conditions solved by dynamic programming, it applies BP neural network training to obtain various working conditions Under the working mode decision-making sub-model, the fuel economy of the vehicle 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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Patent Type & Authority Patents(China)
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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