A start-stop control method of a special hybrid engine

A technology of hybrid power and start-stop control, applied in the direction of engine control, engine start, engine motor start, etc., can solve the problems of unburned HC rise, low-load fuel atomization quality and other problems, and achieve low cost and convenience Application, the effect of reducing fuel consumption

Inactive Publication Date: 2018-11-27
TSINGHUA UNIV
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Problems solved by technology

[0006] In order to solve the defects of poor fuel atomization quality and rising unburned HC in trad

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  • A start-stop control method of a special hybrid engine
  • A start-stop control method of a special hybrid engine
  • A start-stop control method of a special hybrid engine

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Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Invent a modular embodiment, not an entire embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] The hybrid electric vehicle drive system is composed of a traditional internal combustion engine and an electric drive system. It can achieve the purpose of improving the economic performance of the vehicle and reducing exhaust pollution through the advanced vehicle control system. The earliest sign of increasing the degree of electrification of traditi...

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Abstract

The invention provides a start-stop control method of a hybrid special engine, wherein the start control includes quickly starting the engine by using a high electric motor auxiliary torque backhauling; The auxiliary torque of the control motor decreases slowly after being halved. Controlling the engine to inject fuel; The auxiliary torque of the control motor is gradually reduced to 0, and the engine catches fire steadily. The invention improves the transient working characteristics of the hybrid special engine by optimizing the motor torque auxiliary control process and reasonably utilizingthe capability of multiple injections of the advanced fuel injector. The invention does not need to change the engine hardware structure, and has the advantages of low cost and convenient application.The engine speed is raised to the target speed which is much higher than the traditional speed by using the high electric motor auxiliary torque to start the engine quickly, which greatly reduces thefuel consumption during the starting process and further shortens the light-off time of the after-treatment system. The engine quick start process takes less than 10 engine cycles, significantly reducing the number of incomplete combustion cycles and thus reducing unburned HC emissions.

Description

technical field [0001] The present invention relates to the control field of a hybrid drive system, and more specifically, to a start-stop control method of a hybrid special engine. Background technique [0002] The hybrid electric vehicle (Hybrid Electric Vehicle, HEV) drive system is composed of a traditional internal combustion engine and an electric drive system. It can achieve the purpose of improving the economic performance of the vehicle and reducing exhaust pollution through the advanced vehicle control system. Because of its low investment, wide choice, easy to meet future emission standards and energy-saving goals, hybrid vehicles are being widely valued by domestic and foreign automakers. Hybrid technology can take into account the advantages of pure electric vehicles and traditional fuel vehicles, and has become an important development direction of new energy vehicles in the next stage. [0003] The earliest sign of increasing the degree of electrification of ...

Claims

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Application Information

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IPC IPC(8): F02N11/08F02N19/00F02D41/40
CPCF02D41/402F02D2041/389F02N11/08F02N11/0851F02N19/005F02N2019/008Y02T10/40
Inventor 王志范钦灏
Owner TSINGHUA UNIV
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