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Natural gas engine combustion system and natural gas engine

A combustion system and natural gas technology, applied in engine components, engine control, combustion engines, etc., can solve the problems of low thermal efficiency, high emissions, and large heat load of natural gas engines, achieve full combustion, solve high heat load, and expand lean combustion. extreme effect

Inactive Publication Date: 2016-02-24
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing natural gas engine has a large thermal load, low thermal efficiency and NO x high emissions

Method used

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  • Natural gas engine combustion system and natural gas engine

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] Such as figure 1 , the combustion system of a kind of natural gas engine combustion method of the present invention, it comprises:

[0041] Natural gas supply equipment 1, used to provide natural gas fuel;

[0042] A gas collection chamber 2, the gas collection chamber is provided with a gas collection chamber inlet 21 and a gas collection chamber exhaust port 22, and the gas collection chamber inlet 21 is connected to the natural gas supply device 1;

[0043] The throttle valve 3 is used to feed air, and a throttle valve exhaust port 31 is arranged on it, and the throttle valve exhaust port 31 is connected with the air inlet 21 of the air collection chamber;

[...

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Abstract

The invention relates to the technical field of internal combustion engines, and discloses a natural gas engine, and a combustion system and a combustion method for the natural gas engine. The natural gas engine, the combustion system and the combustion method have the advantages that gas inlets of a part of cylinders of the natural gas engine are connected with natural gas supply equipment on the basis that a cooling EGR (exhaust gas recirculation) technology is applied to the natural gas engine, and excessive natural gas flows into the part of cylinders and is combusted to generate modified mixed gas containing H<2> and CO; exhaust ports of the part of cylinders are connected with a gas collecting cavity, the modified mixed gas is totally led into the gas collecting cavity, and the modified mixed gas and gas in the gas collecting cavity are mixed with each other and then flow into various cylinders to participate in combustion; a large quantity of hydrogen is contained in the gas which is modified by the part of cylinders, and can accelerate combustion of the mixed gas, so that the flammability limit of gas in the cylinders can be upgraded under the condition of a high EGR rate, NO<x> is reduced, the combustion temperature is lowered, knocking can be suppressed, the dynamic property and the economical efficiency of the engine can be improved, and the difficult problem of high heat load of an existing natural gas engine can be solved.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a natural gas engine combustion system and combustion method, and a natural gas engine. Background technique [0002] Natural gas is the clean energy with the largest reserves in the world. It is used in automobile engines, and the spark ignition mode has been widely used. In recent years, with the development and maturity of hydraulic fracturing technology and horizontal drilling technology, the recoverable natural gas reserves have grown rapidly, which will have an important impact on my country's energy development pattern. The use of natural gas engines can reduce particulate matter emissions by nearly 80%, and carbon dioxide emissions by 15-30%. [0003] For spark ignition, microwave ignition or compression ignition natural gas engines, the gas mixture in the traditional lean-burn mode cylinder releases a large amount of heat during combustion, which inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D19/02F02B1/00F01N3/18
CPCY02T10/30
Inventor 王志刘辉黄健王建昕
Owner TSINGHUA UNIV
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