Downhill slide control method of hybrid electric vehicle

A hybrid vehicle and control method technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as inability to stably control vehicle speed, and achieve the effect of improving timeliness and safety

Inactive Publication Date: 2015-08-26
ZHENGZHOU YUTONG BUS CO LTD
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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 hybrid vehicle downhill sliding control method to solve the problem that the traditional downhill control method cannot stably control the vehicle speed

Method used

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  • Downhill slide control method of hybrid electric vehicle
  • Downhill slide control method of hybrid electric vehicle

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Experimental program
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Embodiment Construction

[0016] The invention provides a method for controlling downhill sliding of a hybrid electric vehicle. When the braking power of the motor is greater than the charging power allowed by the power battery, the part of the braking power equal to the charging power is used to charge the power battery, and the other part of the power is used as the ISG The driving power of the motor, the ISG motor rotates to drive the engine to rotate for energy consumption.

[0017] Based on the above basic ideas, a specific description will be given below in conjunction with the accompanying drawings.

[0018] like figure 1 As shown, it is a hybrid power system, including control unit, engine, ISG motor, clutch, main motor, dual motor controller and power battery. The final reducer is connected to the wheels, the dual motor controller is electrically connected to the ISG motor, the main motor and the power battery, and the control unit is connected to the engine, ISG motor, main motor, clutch and...

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Abstract

The invention relates to a downhill slide control method of a hybrid electric vehicle. When a P motor which is a motor braking power is less than or equal to a P battery which is a charging power allowed by a power battery, the whole P motor is charged by the power battery; and when the P motor exceeds the P battery, the P motor is divided into two parts including the P battery and a P motor-P battery, wherein the P battery part is used for charging of the power battery, the P motor-P battery part is taken as drive power of an ISG motor, and the ISG motor is rotated to drive engine rotation in order to realize energy consumption. Energy consumed by the engine can be worked out, so that the engine can accurately assume the energy needing to be consumed, and thus vehicle speed stabilization of the vehicle during a downhill process can be ensured.

Description

technical field [0001] The invention relates to a downhill sliding control method of a hybrid electric vehicle, which belongs to the field of vehicle safety. Background technique [0002] When a hybrid vehicle slides downhill, especially a passenger car, it has a large load, and the driving power P d At this time, if the rolling resistance and wind resistance of the vehicle generate resistance power P f If it is not enough to balance the driving power, the speed of the vehicle will become faster and faster when going downhill, which is very unsafe for vehicles or pedestrians, which requires the main motor to provide additional braking power P 电机 to dissipate the driving power, when P f +P 电机 =P d , the vehicle can run at a constant speed on the slope at a certain speed. [0003] In the prior art, the methods for keeping the vehicle speed relatively stable include: calculating the corresponding braking torque based on the variation of the vehicle speed, and then allocati...

Claims

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Application Information

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IPC IPC(8): B60W30/18B60W20/00B60W10/18B60W10/02B60W10/06B60W10/08
CPCB60W10/02B60W10/06B60W10/08B60W10/18B60W20/00B60W30/18072B60W2710/083Y02T10/62
Inventor 李涛苏常军肖丹丹高建平李高鹏
Owner ZHENGZHOU YUTONG BUS CO LTD
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