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Dual-fuel engine combustion mode switching control method, system and vehicle

A dual-fuel engine and combustion mode technology, applied in engine control, combustion engines, internal combustion piston engines, etc., can solve problems such as torque fluctuations, power changes, and impact on vehicle ride comfort, so as to reduce power changes and torque fluctuations, and realize Smooth transition, improve the effect of smoothness

Active Publication Date: 2020-10-02
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the switching process of each working mode, since the work of fuel in each working mode is generally different, power changes and torque fluctuations often occur, which will undoubtedly affect the ride comfort of the vehicle

Method used

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  • Dual-fuel engine combustion mode switching control method, system and vehicle
  • Dual-fuel engine combustion mode switching control method, system and vehicle
  • Dual-fuel engine combustion mode switching control method, system 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 It is a flowchart of a switching control method for a combustion mode of a dual-fuel engine according to an embodiment of the present invention.

[0034] In the following description, a dual-fuel engine refers to a dual-fuel engine of two fuels, gasoline and diesel. figure 2 It is a structural schematic diagram of a cylinder head of a dual-fuel engine according to an embodiment of the present invention. Such as figure 2 As shown, the two gasoline injectors can be used for port injection and direct injection of gasoline respectively, the diesel injector can be used for direct injection of diesel, and the spark plug can be used for spark ignition.

[0035] In an embod...

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PUM

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Abstract

The invention provides a switching control method of dual-fuel engine combustion modes, a system and a vehicle. The method comprises the following steps of when a fist combustion mode is switched to a second combustion mode, controlling a sparking plug of a dual-fuel engine to stop ignition; when the second combustion mode is switched to a third combustion mode, supplying preset amount of diesel oil in a direct injection manner, and accordingly reducing the supply amount of gasoline; and when the third combustion mode is switched to a fourth combustion mode, gradually increasing the supply amount of the diesel oil, gradually reducing the supply amount of the gasoline, and gradually moving forwards the post injection phase of the diesel oil from the first phase to the second phase. Through the adoption of the method disclosed by the invention, not only can the thermal efficiency of the engine be improved, but also the riding comfort of the vehicle can be improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a switching control method, system and vehicle of a dual-fuel engine combustion mode. Background technique [0002] Dual-fuel engines, such as gasoline and diesel dual-fuel engines, have the advantage of low exhaust pollutant emissions compared to traditional diesel engines, and have the advantage of high fuel economy compared to traditional gasoline engines. At present, in order to further improve thermal efficiency, dual-fuel engines generally have multiple working modes, so that they can work with different fuels or different ignition modes under different load conditions. [0003] However, during the switching process of each working mode, because the work of fuel in each working mode is generally different, power changes and torque fluctuations often occur, which will undoubtedly affect the ride comfort of the vehicle. Contents of the invention [0004] In view of thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F01N3/04F02M25/035F02B37/02F02B37/20F02B37/00F02B69/02
CPCF01N3/04F02B37/00F02B37/025F02B37/20F02B69/02F02D37/00F02D41/0025F02D41/3094F02D2200/02F02D2200/602F02M25/0227F02M25/035Y02T10/12
Inventor 崔亚彬王帅赵伟博
Owner GREAT WALL MOTOR CO LTD