Idling control method and system for dual-fuel engine, and vehicle

A dual-fuel engine and idle speed control technology, which is applied in engine control, fuel injection control, machine/engine, etc., can solve the problems of engine vibration, high ignition point of gasoline, and no hot atmosphere established, so as to reduce emissions and reduce exhaust pollution The effect of emissions

Active Publication Date: 2016-11-23
GREAT WALL MOTOR CO LTD
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Problems solved by technology

On the one hand, when the engine is just started, the intake air temperature and water temperature are low, a good thermal atmosphere is not established in the cylinder, and the ignition point of gasoline is high. At this time, it is not easy to burn after injecting gasoline, resulting in vibration when the engine is ru

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  • Idling control method and system for dual-fuel engine, and vehicle
  • Idling control method and system for dual-fuel engine, and vehicle
  • Idling control method and system for dual-fuel engine, and vehicle

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Embodiment Construction

[0031] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] figure 1 is a flow chart of an idle speed control method for a dual-fuel engine according to an embodiment of the present invention. Before describing the idle speed control method of the dual-fuel engine according to the embodiment of the present invention, the dual-fuel engine is first described. The dual-fuel engine of the embodiment of the present invention is an engine fueled by gasoline and diesel oil, and the fuel injection method is injection in the air passage. Gasoline, direct injection diesel. Such as image 3 As shown, it is a structural diagram of a four-cylinder dual-fuel engine, which includes: throttle valve 1, intake manifold 2, heating wire 3, gasoline injecto...

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Abstract

The invention provides an idling control method and an idling control system for a dual-fuel engine, and a vehicle. The method comprises the following steps: acquiring intake air temperature and engine coolant temperature; judging whether a preset condition is met according to the intake air temperature and engine coolant temperature; and if the preset condition is met, selecting an idling fuel injection mode according to the intake air temperature, wherein the idling fuel injection mode comprises a pure diesel injection mode, a partial-cylinder dual-fuel injection mode and a full-cylinder dual-fuel injection mode: when the intake air temperature is less than a first threshold value, selecting the pure diesel injection mode for idling; when the intake air temperature is greater than the first threshold value and less than a second threshold value, selecting the partial-cylinder dual-fuel injection mode for idling; when the intake air temperature is greater than the second threshold value and less than a third threshold value, selecting the full-cylinder dual-fuel injection mode for idling, wherein the first threshold value is less than the second threshold value, and the second threshold value is less than the third threshold value. The method disclosed by the invention has the advantage of effectively reducing the emission of exhaust gas pollutants during idling.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an idle speed control method, system and vehicle of a dual-fuel engine. Background technique [0002] As environmental problems and energy problems become more and more severe, attention is paid to the fuel economy and emissions of internal combustion engines. Internal combustion engines are currently widely used in various industries. In the automotive industry, the emission regulations formulated by the state are becoming more and more stringent. How to Reducing the fuel consumption of the engine, reducing the emission of pollutants, and improving the power and economy are the goals pursued by major automobile manufacturers around the world in recent years. Traditional engines are mainly divided into gasoline engines and diesel engines. Gasoline engines have better emissions, but their fuel economy is determined by their ignition methods. Diesel engines use compression comb...

Claims

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Application Information

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IPC IPC(8): F02D19/08F02D17/04F02D41/30
Inventor 卢丰翥陈雄伟刘瑞王正庭刘秀会鲁志远
Owner GREAT WALL MOTOR CO LTD
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