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Method for controlling engine torque in hybrid-powered motor speed variator shift process

A hybrid vehicle, engine torque technology, applied in the direction of engine control, machine/engine, transmission control, etc., can solve problems such as insufficient smooth speed change, unsustainable transmission of internal combustion engine power, and uncomfortable occupants in the vehicle, and achieve smoothness. The effect of transmission, excellent shifting stability, and excellent vehicle riding comfort

Inactive Publication Date: 2007-02-07
FAW GROUP
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] In a traditional car driven only by an internal combustion engine, the power of the internal combustion engine cannot be continuously transmitted to the wheels due to the disengagement of the clutch during the shifting of the transmission, which affects the dynamic performance of the vehicle and also causes the vehicle speed to change unsmoothly (such as figure 1 shown), which brings discomfort to the occupants of the vehicle

Method used

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  • Method for controlling engine torque in hybrid-powered motor speed variator shift process
  • Method for controlling engine torque in hybrid-powered motor speed variator shift process
  • Method for controlling engine torque in hybrid-powered motor speed variator shift process

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Embodiment Construction

[0016] The output torque of the engine is used to compensate the change of the transmission output shaft torque caused by the change of the gear ratio after shifting, so that the engine torque on the output shaft of the transmission is the same before and after the shift, such as image 3 Shown (taking the transmission upshift as an example). This patent uses a controller as a carrier and is realized through a control system including the controller.

[0017] According to the vehicle speed and the position of the accelerator pedal, the controller calculates the torque T that the engine must exert on the output shaft of the transmission according to a determined method E2 .

[0018] Set the engine output torque T before shifting EB , transmission ratio G B ;Engine output torque T after gear shift EA , transmission ratio G A .

[0019] Then T EB =T E2 / G B ①

[0020] T EA =T E2 / G A =T EB ×G B / G A ②

[0021] The controller calcul...

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Abstract

The invention relates to an engine torsion control method in the shift process of mixed power vehicle speed changer, wherein based on the driving speed and the position of acceleration pedal, the controller via preset method, calculates out the torsion needed on the output axle of speed changer, to obtain the output torsion after and before the shift. With said invention, the power transmitted to the wheels can keep stable in shift process, to reach the stability of CVT (stepless speed changer).

Description

technical field [0001] The invention relates to an engine torque control method in the gear shifting process of a transmission of a hybrid electric vehicle, in particular to an engine torque control method in the gear shifting process of an automatic gear shifting stepped transmission of a hybrid electric vehicle. Background technique [0002] With the increasingly prominent global environmental and energy issues, the development of new vehicles with low emissions and low fuel consumption has become the primary task of the development of the automotive industry today. Hybrid electric vehicle technology avoids the shortage of battery technology and energy infrastructure of pure electric vehicles. It is a good solution to current problems and has become a hot spot in international automotive research and development. [0003] In a traditional car driven only by an internal combustion engine, the power of the internal combustion engine cannot be continuously transmitted to the ...

Claims

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Application Information

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IPC IPC(8): F02D29/02F16H59/14
Inventor 唐志强周莹市川耕司吉見秀和松下昌弘龍見哲治伊藤伸一大屋勝則荒川誠
Owner FAW GROUP
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