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Premixed combustion system of diesel engine

A pre-mixed combustion and diesel engine technology, applied in the direction of charging system, combustion engine, mechanical equipment, etc., to achieve the effect of simple exhaust gas after-treatment system, maintaining efficiency, and compensating for the loss of thermal efficiency

Inactive Publication Date: 2013-03-27
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In addition, the rapid development of battery technology also poses a severe challenge to diesel engines

Method used

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  • Premixed combustion system of diesel engine
  • Premixed combustion system of diesel engine
  • Premixed combustion system of diesel engine

Examples

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Embodiment Construction

[0026] figure 1 The shown diesel engine premixed combustion system main fuel injector and secondary fuel injector both adopt the way of in-cylinder direct injection.

[0027] figure 2 The sub-injector of the pre-mixed combustion system shown in the diesel engine adopts the method of in-cylinder direct injection, and the main injector is installed in the intake port.

[0028] image 3 The main fuel injector, auxiliary fuel injector and water injector of the premixed combustion system of the diesel engine shown above all adopt the method of in-cylinder direct injection.

[0029] Figure 4 The main fuel injector and auxiliary fuel injector of the diesel premixed combustion system shown in the figure adopt the method of direct injection in the cylinder, and the water injector is installed in the intake passage.

[0030] Figure 5 The diesel engine pre-mixing combustion system shown makes the main injector and the auxiliary injector into an integrated injector, and adopts th...

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Abstract

The invention provides a premixed combustion system of a diesel engine and belongs to the field of combustion of an internal-combustion engine. The combustion system sprays diesel oil or heavy oil or a mixture of the diesel oil and fuel with the automatic ignition temperature which is higher than that of the diesel oil and a cetane number which is lower than that of the diesel oil into a combustion chamber by a main oil spraying nozzle or sprays from an air inlet cannel to form premixed gas; a low compression ratio is adopted to enable the premixing gas formed in a cylinder not to be automatically ignited by depending on a compression temperature; with regard to the fuel which corresponds to the fuel sprayed by the main oil spraying nozzle and is directly sprayed into the combustion chamber from a part adjacent to a compression upper stopping point through a secondary oil spraying nozzle, the fuel with the low automatic ignition temperature and the high cetane number is the fuel which is easier to ignite by compression; and the fuel is ignited and combusted in the cylinder so as to effectively control an ignition phase of the premixed gas and realize the homogenous premixed compression ignition in a full work condition range. Waste gas is recycled or water is sprayed into an air cylinder or the air inlet channel to control the combustion speed; and the high heat efficiency is guaranteed by a high expansion ratio.

Description

technical field [0001] The invention relates to a diesel engine premix combustion system, which belongs to the field of internal combustion engine combustion. Background technique [0002] As we all know, on the one hand, the diversification of diesel engine fuels is accelerating, on the other hand, in order to meet increasingly stringent emission regulations and economic requirements, diesel engine technology is becoming more and more complex, and the cost is constantly rising. In addition, the rapid development of battery technology also poses a severe challenge to diesel engines. Contents of the invention [0003] In order to improve the performance of the diesel engine, reduce the cost, and enhance the competitiveness of the diesel engine, the present invention provides a premixed combustion system for the diesel engine. This combustion system adopts a thermodynamic cycle with a low compression ratio and a high expansion ratio. Enhance cooling, or spray water through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B7/02F02M25/03F02M25/028F02M25/07F02M26/00
CPCY02T10/121Y02T10/12
Inventor 隆武强田江平盛凯
Owner DALIAN UNIV OF TECH
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