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Method for controlling shutdown position of automobile engine

A technology of automobile engine and control method, which is applied in the field of hybrid vehicle engine shutdown position control and automobile engine shutdown position control, can solve the problems of large control delay and poor effect, improve the starting success rate, and control algorithm is clear , high real-time effect

Active Publication Date: 2014-09-10
DONGFENG MOTOR CORP HUBEI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of CAN communication rate, the method in the literature has a large control delay, and the engine stop position belongs to angular position control, which requires high real-time control. The method in the literature is not effective in actual control.

Method used

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  • Method for controlling shutdown position of automobile engine
  • Method for controlling shutdown position of automobile engine
  • Method for controlling shutdown position of automobile engine

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Experimental program
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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] In the present invention, in the main control CPU of the motor controller, the mapping table of the engine with angle and the resistance torque and the point (corresponding angle) of the minimum resistance torque of the engine in one mechanical cycle are prestored.

[0036] When the engine stops naturally (that is, the speed is zero), query the control point closest to the minimum engine resistance torque position according to the engine rotation direction, and set it as the target stop position, and then stop the engine at the designated position by controlling the ISG motor. The control principle block diagram and control system block diagram of the hybrid vehicle engine stop position control device based on the ISG system are as follows: figure 2 and image 3 shown.

[0037] The control method of the method is simple and ...

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PUM

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Abstract

The invention discloses a method for controlling the shutdown position of an automobile engine. The method comprises the following steps that whether the current rotating speed omega of the engine is lower than the minimum ignition rotating speed omega Max of the engine or not is judged; if the current rotating speed of the engine is lower than the minimum ignition rotating speed, that is, omega<omega Max, whether the rotating speed of the engine is 0 or not continues to be judged; if the rotating speed of the engine is 0, the engine shutdown position control procedure is executed. Compared with the prior art, the method has the advantages that due to the fact that an ISG motor and the engine are coaxial, and the ISG motor has high position precision, when the engine is shut down, the engine is driven and controlled by the ISG motor to be shut down at the position with the minimum resisting moment, and the high success rate of starting the engine by an ISG system can be guaranteed.

Description

technical field [0001] The invention relates to the field of engine shutdown position control of a hybrid electric vehicle, in particular to a method for controlling the engine shutdown position of an automobile. Background technique [0002] The grim situation of global energy and the environment, especially the huge impact of the international financial crisis on the automobile industry, has pushed countries around the world to accelerate the strategic transformation of transportation energy. New energy vehicles represented by hybrid vehicles, pure electric vehicles and fuel cell vehicles have become the future vehicles important direction of development. [0003] Because electric vehicles are currently facing difficulties such as short driving range, expensive batteries, and imperfect infrastructure, it will take a considerable period of effort to gradually solve them; while hybrid vehicles have better industrialization conditions at this stage, Hybrid electric vehicles a...

Claims

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Application Information

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IPC IPC(8): B60W10/06B60W10/08B60W20/00B60W20/15
CPCY02T10/6286B60W10/06B60W10/08B60W20/00B60W2510/0638B60W2710/0666Y02T10/62
Inventor 尹国慧王洪涛罗建武程诚孙志华徐刚
Owner DONGFENG MOTOR CORP HUBEI
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