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Control method, system and vehicle of multi-stroke cycle dual-fuel engine

A dual-fuel engine and control method technology, applied in engine control, machine/engine, electrical control, etc., can solve problems such as large heat loss, poor emissions, and high heat loss

Active Publication Date: 2021-07-20
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current four-stroke cycle internal combustion engine has a lot of heat loss
[0003] Especially under the partial load operation of the internal combustion engine, the heat loss is very large, which leads to high fuel consumption and poor emission.

Method used

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  • Control method, system and vehicle of multi-stroke cycle dual-fuel engine
  • Control method, system and vehicle of multi-stroke cycle dual-fuel engine
  • Control method, system and vehicle of multi-stroke cycle dual-fuel engine

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Embodiment Construction

[0039] 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.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0041] figure 1 is a flowchart of a control method for a multi-stroke cycle engine according to an embodiment of the present invention.

[0042]Before describing the control method of the multi-stroke cycle engine in the embodiment of the present invention, the multi-stroke cycle engine is introduced first. The multi-stroke cycle engine at least includes an intake stroke, a compression stroke, a power stroke and an exhaust stroke. The number of strokes of the multi-stroke cycle engine is N, and the N is an even number greater than or equal to four. The first stroke in the multi-stroke cycle mode is The stroke is an intake stroke, the second stroke is a compression stroke, the Nth strok...

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Abstract

The present invention provides a control method, system and vehicle of a multi-stroke cycle dual-fuel engine. The method includes the following steps: when the cylinder is in the intake stroke and / or the exhaust stroke, supply gasoline fuel to the air passage; when the cylinder is in the From the end of the adjacent compression stroke to the front of the power stroke, diesel fuel is supplied to the cylinder; ignition is carried out by compression ignition or spark ignition is selected according to the ratio of gasoline fuel and diesel fuel in the operating conditions of the multi-stroke cycle dual-fuel engine or compression ignition. The method of the invention can effectively improve the fuel economy of the engine in multiple operating conditions and reduce the emission of exhaust pollutants.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a control method, system and vehicle of a multi-stroke cycle dual-fuel engine. Background technique [0002] At present, a vehicle internal combustion engine (such as a gasoline engine) is usually a four-stroke cycle internal combustion engine, that is, four strokes of intake, compression, power, and exhaust. The thermal energy of fuel combustion and explosion in the combustion chamber is transformed into rotational kinetic energy for external output through the crank-link mechanism, but in each working cycle, only less than a quarter of the time may be able to effectively output kinetic energy, while in the entire four The heat loss and mechanical loss in the stroke cycle always exist, especially in the ventilation phase (during the exhaust and intake strokes), 30% to 40% of the heat energy will be lost. The heat loss of the current four-stroke cycle internal combustion eng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00
CPCF02D37/02F02D41/0025F02D41/30
Inventor 裴俊杨王义夫张猛杨中华乔佳伟夏培生
Owner GREAT WALL MOTOR CO LTD