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Dual-fuel engine and control method thereof

A dual-fuel engine and control method technology, applied in engine control, combustion engine, fuel injection control and other directions, can solve the problem that dual-fuel engines cannot use ignition fuel under small load conditions, and achieve good economical, Improve combustion quality and prevent knocking

Inactive Publication Date: 2018-05-01
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a dual-fuel engine and its control method, which solves the problem that the existing dual-fuel engine cannot burn ignition fuel under light load conditions, and realizes dual-fuel engine. Full substitution of ignition fuel for compression ignition fuel under light load conditions of fuel engines (100% replacement rate), improving the economy and emission of existing dual fuel engines under light load conditions, and giving full play to dual fuel engines performance advantage

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  • Dual-fuel engine and control method thereof

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Embodiment Construction

[0049] The present disclosure provides a control method for a dual-fuel engine, which realizes ignition and ignition under cold start, warm-up, idling and low load conditions, and compression ignition under medium and heavy load conditions. work, including the following:

[0050] (1) The dual-fuel engine is under the condition of cold start, warm-up or idling

[0051] (1) The engine ECU14 controls the opening of the throttle valve 11 to keep fully closed, and at this time, air still enters;

[0052] (2) The engine ECU 14 controls the compression ignition fuel injector 7 to stop working;

[0053] (3) The engine ECU 14 controls the ignited fuel injector 10 to determine the amount of injected ignited fuel according to the mixed gas concentration requirements under cold start, warm-up and idle operating conditions, that is, the excess air coefficient λ Figure 4 , Excess air coefficient λ=actually supplied air volume / air volume required for complete combustion of fuel;

[0054] A...

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Abstract

The invention discloses a dual-fuel engine and a control method thereof. The dual-fuel engine comprises an ignition device and a throttle valve device, wherein the ignition device and the throttle valve device are connected with an ECU of the engine, a spark plug of the ignition device is installed on a cylinder cover of the engine, and the throttle valve device is installed on an air inlet main pipe of the engine. The invention further discloses a control method of the dual-fuel engine. The problem that an existing dual-fuel engine cannot burn ignition type fuel under a small-load working condition is solved, full-substitution (the substituting rate is 100%) of the ignition type fuel for compression-ignition type fuel under the low-load working condition of the dual-fuel engine is realized. the economical efficiency and the emission performance of the existing dual-fuel engine under the low-load working condition are improved, and the performance advantages of the dual-fuel engine arebrought into full play.

Description

technical field [0001] The invention belongs to the field of engine technology and control methods, and relates to a dual-fuel engine and a control method thereof. Background technique [0002] Due to the difference in physical and chemical properties, the application methods of ignition fuels in compression ignition engines mainly include emulsification method, combustion-supporting method, direct compression ignition method, and dual-fuel method. Among them, the dual-fuel method means that during the working process of the engine, a part of the ignited fuel is input into the cylinder of the compression ignition engine through the intake system or the oil supply system, and a part of the premixed combustible mixture is formed in the cylinder, and then the compression is stopped. A small amount of compression ignition fuel is injected into the cylinder near the point, and the premixed combustible mixture formed by the ignition fuel and air is ignited by compression ignition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/08F02D41/14F02D41/40F02B11/00
CPCF02B11/00F02D19/081F02D35/027F02D41/1454F02D41/40F02D41/401F02D2200/0404F02D2200/101
Inventor 滑海宁谢斌贺晶晶韩斌刘生全李阳阳
Owner CHANGAN UNIV