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Torque coordination control method of hybrid electric vehicle engine and motor

A hybrid vehicle, motor torque technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., to achieve the effect of improving driving comfort and power, improving economy, and increasing response speed

Inactive Publication Date: 2012-03-28
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for coordinatingly controlling the torque of the engine and the motor to meet the torque reduction requirements of the transmission during hybrid driving. By coordinating the torque of the motor and the engine to achieve the purpose of torque reduction, the performance of the above-mentioned single-control engine is greatly improved. Insufficient, so that driving comfort, power and economy are improved

Method used

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  • Torque coordination control method of hybrid electric vehicle engine and motor
  • Torque coordination control method of hybrid electric vehicle engine and motor
  • Torque coordination control method of hybrid electric vehicle engine and motor

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Embodiment Construction

[0040] figure 1 Shown is a parallel hybrid power system, which includes vehicle controller HCU 1, ISG motor controller IPU2, power battery 3, transmission controller TCU4, continuously variable transmission CVT5, clutch 6, ISG motor 7 (hereinafter referred to as motor), engine 8 , engine controller ECU9.

[0041] The method of the present invention uses the vehicle controller HCU1 as a carrier, and is realized through a parallel hybrid power system including this control method. The following five different situations are combined. Figure 7 The technical implementation process of the present invention will be described.

[0042]Motor assist case 1 (see figure 2 ):

[0043] 1) The vehicle drives to a certain state, the driver's demand torque Tq_drv_req=160Nm, Tq_boost=120Nm, Tq_drv_req> Tq_boost, needs the motor to assist, the vehicle controller HCU1 distributes the target torque to the engine as Tq_ice_req=120Nm, and distributes it to the motor target torque Tq_mg_req=40...

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Abstract

The invention provides a method for coordination control of engine and motor torques to meet torque reducing requirement of a speed changer in hybrid driving process. The method reaches torque reducing purpose by coordination control of motor and engine torques, increases torque reducing response speed by fast response characteristic of the motor, benefits for adjustment of speed ratio and improves the driving comfortableness and dynamic property. Simultaneously, the invention preferentially reaches the torque reducing purpose by adjusting the motor, reduces dynamic process of the engine, facilitates the engine to work more stably and improves economical efficiency.

Description

technical field [0001] The invention relates to a method for coordinated control of engine and motor torque, in particular to a method for coordinated control of engine and motor torque during the running of a parallel hybrid electric vehicle. Background technique [0002] As the global energy shortage and environmental pollution caused by vehicle emissions are becoming more and more serious, it has become the consensus of all walks of life to promote new energy vehicles with low energy consumption and low emissions. Hybrid electric vehicles are the first choice for large-scale industrialization at present. At the same time, as users' demand for driving and comfort increases, it is necessary to develop hybrid electric vehicles with automatic transmissions, especially continuously variable transmissions. Continuously variable transmissions (CVT) and manual Compared with the automatic transmission (MT) or stepped automatic transmission (AT), the driving comfort and power are g...

Claims

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Application Information

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IPC IPC(8): B60W20/00B60W10/06B60W10/08B60W40/10B60W20/15
CPCY02T10/6286Y02T10/62
Inventor 刘杰洪木南严钦山李宗华苏岭朱华荣
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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