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Hybrid electric vehicle work mode switching process dynamic coordination control method

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 poor power and ride comfort of the whole vehicle, so as to improve driving ride comfort, reduce wear and tear, and ensure The effect of stationarity

Active Publication Date: 2015-06-03
奇瑞新能源汽车股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the mode switching process, if the throttle opening of the engine is not effectively controlled, it will lead to poor power and smoothness of the vehicle during the switching process

Method used

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  • Hybrid electric vehicle work mode switching process dynamic coordination control method
  • Hybrid electric vehicle work mode switching process dynamic coordination control method
  • Hybrid electric vehicle work mode switching process dynamic coordination control method

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Embodiment Construction

[0026] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0027] The abbreviations in the picture and text are:

[0028] MCU - motor management system;

[0029] BMS - power battery management system;

[0030] HCU——vehicle controller;

[0031] AMT——transmission control unit;

[0032] EMS - Engine Management System.

[0033] Such as figure 1 The power system of the shown hybrid electric vehicle of the present invention includes engine, engine management system (EMS), wet clutch, motor, motor management system (MCU), power battery, power battery management system (BMS), vehicle controller (HCU), mechanical automatic transmission, transmission control unit (AMT) (also controls wet clutch...

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PUM

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Abstract

The invention discloses a hybrid electric vehicle working mode switching process dynamic coordination control method. Accelerator pedal depth is acquired by an EMS (engine management system) to obtain required vehicle torque, and an HCU (vehicle control unit) can select a work mode under a current working condition to work according to the required vehicle torque or the actual working condition; by controlling change rate from engine throttle percentage to target throttle percentage, the engaging speed of a clutch is reasonably controlled according to speed differences of an engine and a motor, insufficient dynamic output torque of the engine is offset by the quick response ability and the characteristic of accuracy torque control of the motor, and output torques of the motor and the engine are coordinated and allocated in the mode switching process. According to the technical scheme, the torque output of a hybrid power system is controlled, so as to reduce the dynamic process of the engine; oil consumption is reduced, so as to improve the economical efficiency; great fluctuation of the required vehicle torque is not generated in the mode switching process, so as to improve vehicle riding comfort; wear of the clutch is reduced, so as to ensure power transmission smoothness.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle control, and in particular relates to a dynamic coordination control method in the process of switching working modes of the hybrid electric vehicle. Background technique [0002] A hybrid vehicle refers to a vehicle with a drive system composed of two or more power units, which combines the advantages of both the engine and the motor. It is a new type of vehicle with low emissions, good economy and long cruising range. [0003] The drive mode of hybrid electric vehicles mainly includes three modes: engine work, motor work, and engine and motor work together. Driving charging mode for charging the battery. It can be seen that the diversification of working modes is an effective means to realize energy saving and emission reduction of parallel hybrid power system. [0004] The control problem of working mode state switching is one of the core control problems of parallel hybrid el...

Claims

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Application Information

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IPC IPC(8): B60W20/00B60W10/06B60W10/08B60W20/20
CPCB60W10/02B60W10/06B60W10/08B60W20/40B60W40/09B60W2510/0638B60W2510/081B60W2510/242B60W2540/10B60W2710/021B60W2710/0605B60W2710/0666B60W2710/083Y02T10/62
Inventor 崔挺李军华肖岩孔令静王春丽柳士江
Owner 奇瑞新能源汽车股份有限公司
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