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Hydrogen engines and its burnt gas jet method

A gas injector and engine technology, applied in engine components, combustion engines, machines/engines, etc., can solve the problems of low gas charging efficiency and thermal efficiency of hydrogen engines, early combustion and tempering of carburetor engines, insufficient output power, etc. , to achieve the effect of solving the problems of early combustion and tempering, improving combustion and reducing emissions

Active Publication Date: 2008-09-10
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For hydrogen engines, delivering fuel through a carburetor is the simplest fuel supply method, but carburetor engines are prone to abnormal combustion such as early ignition and flashback
Gas and air are mixed in the air passage and then enter the cylinder, resulting in low charging efficiency and thermal efficiency of the hydrogen engine, and insufficient output power
In addition, there will be an increase in emissions

Method used

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  • Hydrogen engines and its burnt gas jet method

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Effect test

Embodiment 1

[0029] The gas injector described in the above technique includes an external mixing gas injector 7 for indirect injection and an internal mixing gas injector 12 for direct injection.

[0030] Direct injection and indirect injection are realized by these two different gas injectors. And according to the needs of actual working conditions, control the corresponding gas injectors to perform gas injection under different conditions, or stop the injection. The combination of the two gas injectors realizes the stated purpose of the invention.

Embodiment 2

[0032] The structure and installation method of the external mixed gas injector 7 described in the first embodiment is to communicate with the cylinder 10 through the connection port between the intake manifold 6 and the cylinder head 8 .

[0033] The external mixing gas injector 7 can use the 3.5bar KEIHIN second-generation CNG injector to realize the injection. The external mixing gas injector 7 mixes the hydrogen in the intake port and injects it into the cylinder 10 indirectly.

Embodiment 3

[0035] The structure and installation method of the internal mixed gas injector 12 described in the first embodiment: directly communicates with the cylinder 10 through the cylinder head 8, and is located in the central position of the cylinder head 8 next to the CNG special spark plug 13.

[0036] The internal mixture gas injector 12 injects hydrogen directly into the cylinder. Since the internal mixed gas injector 12 located in the center of the cylinder directly injects near the CNG special spark plug 13 (between the intake valve and the exhaust valve), the charging efficiency is improved and the power of the engine is improved.

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Abstract

The invention discloses a hydrogen engine, which comprises a fuel gas supply system, an intake manifold, a CNG special spark plug and a cylinder, wherein, fuel gas injectors are arranged on different positions of the end part of the fuel gas supply system extending into a cylinder cover of the engine; and hydrogen is directly injected into the cylinder of the engine through the fuel gas injector or is indirectly injected into the cylinder of the engine through the fuel gas injector after mixing with inlet gas in an inlet channel. By adoption of the technical proposal, direct injection of hydrogen in the cylinder of the engine is realized; compared with a general hydrogen engine, higher charging efficiency and thermal efficiency are obtained by adoption of higher compression ratio, and the power and the torque of the engine are increased; moreover, the hydrogen engine has the advantages of high power output, high response speed and so on; simultaneously, the combustion is improved and the exhaust is reduced. The problems of premature combustion and backfire are solved by adoption of the control means of combination of direct injection in the cylinder and indirect injection of the inlet channel, and simultaneously the maximum potential and exhaust advantages of hydrogen engines are given full play.

Description

technical field [0001] The invention belongs to the technical field of automobile construction and relates to automobile engines, more specifically, the invention relates to a hydrogen engine. In addition, the present invention also relates to the gas injection method adopted by the hydrogen engine. Background technique [0002] At present, the hydrogen engine on the market generally adopts the method of forming the mixed gas externally, and usually adopts methods such as carburetor, intake manifold injection and intake port injection to form the mixed gas. For hydrogen engines, delivering fuel through a carburetor is the simplest fuel supply method, but carburetor engines are prone to abnormal combustion such as early ignition and flashback. Gas and air are mixed in the air passage and then enter the cylinder, resulting in low charging efficiency and thermal efficiency of the hydrogen engine, and insufficient output power. In addition, it will also cause an increase in em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/02
CPCY02T10/30
Inventor 黄国媛
Owner CHERY AUTOMOBILE CO LTD
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