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Method for controlling gear shift without power interruption of hybrid car

A technology of power interruption and hybrid power, which is applied in the field of driving control of electric vehicles and shift control of hybrid cars without power interruption. The effect of shift quality

Inactive Publication Date: 2011-03-23
FAW GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a hybrid electric car without power interruption shift control method, which utilizes the structural characteristics of the dual-motor hybrid hybrid car, the main motor is connected to the output shaft of the transmission, so that during the shift process, the main motor The motor can still provide driving force for the whole vehicle, thereby avoiding power interruption during the AMT shifting process; solving the problems of poor shifting smoothness and power interruption of AMT shifting to improve shifting quality and ride comfort of the whole vehicle

Method used

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  • Method for controlling gear shift without power interruption of hybrid car
  • Method for controlling gear shift without power interruption of hybrid car
  • Method for controlling gear shift without power interruption of hybrid car

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with accompanying drawing, as figure 1 The BSG motor shown in the figure is connected to the crankshaft pulley of the engine through a belt, and is used to generate electricity and start the engine; the main motor (PM) is connected to the output shaft of the AMT transmission, and is used to drive the whole vehicle.

[0023] (1) AMT shift control such as figure 2 shown

[0024] Te is the engine torque, Tbsg is the BSG motor torque, Tpm is the main motor torque, Tact is the actual vehicle demand torque, and p is a constant coefficient.

[0025] Te-Tbsg·p=Tact before oil cut-off;

[0026] When the oil is cut off, Te decreases to Tact, and Tbsg decreases to 0 at the same time. At this time, Te continues to decrease to 0, and Tpm gradually increases to Tact;

[0027] Tpm=Tact during the gear shifting period, providing driving force for the whole vehicle to complete gear shifting without power ...

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Abstract

The invention relates to a method for controlling gear shift without power interruption of a hybrid car, which is characterized by comprising the following concrete control steps of a gear shift process, a transition process from pure motor driving to engine driving, a transition process from the engine driving to the pure motor driving; and an BSG motor is connected with a crank pulley of a motor, and a driven main motor is connected with an output shaft of a transmission. By means of a fast response characteristic of a motor system, output torque of the whole power transmission system is adjusted and compensated during the gear shift so as to realize the gear shift process without power interruption. In the method of the invention, the defect of power interruption during the gear shift of the traditional AMT system can be made up preferably, dynamic property of the whole car is improved, and smoothness of the whole car is enhanced.

Description

Technical field: [0001] The invention relates to a control method for shifting without power interruption of a hybrid electric car, which belongs to the driving control technology of electric vehicles and is mainly used in the field of hybrid electric vehicle control. Background technique: [0002] Hybrid technology is the most practical clean vehicle technology to solve environmental and energy problems at the present stage, and has become a research hotspot of major automobile companies today, and extensive research has been carried out on this technology in China. Due to the limitations of my country's automobile industry foundation and industrial structure, manual transmissions and AMTs are the majority of transmissions for hybrid electric vehicles in China at present. Although AMT is also a kind of automatic transmission, its smoothness of shifting and interruption of shifting power are still its fatal shortcomings. Invention content: [0003] The object of the prese...

Claims

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Application Information

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IPC IPC(8): B60K6/38B60W10/02B60W10/06B60W10/08B60W20/00B60W10/11B60W20/40
CPCY02T10/6286Y02T10/62
Inventor 李骏刘明辉刘东秦王光平赵子亮杨兴旺
Owner FAW GROUP
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