Combustion control method in hydrogen-doped natural gas engine

A control method and technology of natural gas, applied in the direction of engine control, electric engine control automatic control, electrical automatic control, etc., can solve the problems of restricting clean and efficient combustion, slow natural gas combustion, and low ignition limit.

Pending Publication Date: 2022-05-13
TSINGHUA UNIV +1
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Problems solved by technology

However, the characteristics of natural gas such as slow burning speed and low i

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  • Combustion control method in hydrogen-doped natural gas engine
  • Combustion control method in hydrogen-doped natural gas engine
  • Combustion control method in hydrogen-doped natural gas engine

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[0029] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0030] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counte...

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Abstract

The invention relates to a combustion control method in a hydrogen-doped natural gas engine, which comprises the following steps that: an engine electronic control unit adjusts the hydrogen-doped volume percentage, exhaust gas recirculation rate and ignition advance angle of fuel in real time according to the load working condition of the engine, and enables the excess air coefficient to be 1. A theoretical air-fuel ratio combustion mode is combined with an exhaust gas recirculation (EGR) strategy, according to the load working condition of an engine, fuel components are adjusted in real time (namely, the hydrogen doping volume percentage is adjusted), and cooperative control over engine operation parameters (namely, the exhaust gas recirculation rate and the ignition advance angle are adjusted) is assisted. Therefore, the fuel parameters and the engine operation parameters can well accord with the current load working condition, all the parameters under the current working condition can achieve the optimal effect as much as possible, and efficient, clean and stable operation of the engine and improvement of the power performance are achieved.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a combustion control method in a hydrogen-doped natural gas engine. Background technique [0002] Compared with traditional fuels such as coal and oil, natural gas has the advantages of low emission pollution, low price, and abundant reserves, which makes natural gas gradually widely used in many fields, such as natural gas engines that use natural gas as an alternative fuel for vehicles. Since the advent of natural gas engines at the beginning of last century, after 80 years of development, natural gas engine technology has become increasingly mature. However, the characteristics of natural gas such as slow combustion velocity and low ignition limit limit its clean and efficient combustion under lean-burn conditions. Because hydrogen has the characteristics of fast combustion speed, wide ignition limit and carbon-free, blending with natural gas as a fuel can...

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Application Information

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IPC IPC(8): F02D37/02F02D19/08F02D19/02F02D41/00F02P5/15F02M21/02F02M26/13F02M26/16
CPCF02D37/02F02D41/0027F02D19/081F02D19/085F02D19/023F02D41/0077F02D41/0002F02P5/1516F02P5/045F02M21/0215F02M21/0206F02M21/0218F02M21/0239F02M26/13F02M26/16Y02T10/30
Inventor 马凡华熊思江肖秋红吴智涛刘永振贾子璇郑军平李松桥
Owner TSINGHUA UNIV
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