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Combustion chamber special for marine diesel engine, combustion system and combustion method

A marine diesel engine and combustion chamber technology, applied in the field of combustion chambers, can solve problems such as incomplete oil-gas mixing and unreasonable structure, and achieve the effects of reducing oil-gas over-concentration areas, promoting oil-gas mixing, and improving the mixing degree

Active Publication Date: 2020-10-13
HENAN DIESEL ENGINE IND
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Problems solved by technology

[0005] In order to solve the problem of incomplete oil-gas mixing caused by the unreasonable structure of the necked ω-shaped combustion chamber used in the prior art, the present invention provides a combustion chamber, combustion system and combustion method for marine diesel engines, which can effectively solve the above-mentioned problems. technical problem

Method used

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  • Combustion chamber special for marine diesel engine, combustion system and combustion method
  • Combustion chamber special for marine diesel engine, combustion system and combustion method
  • Combustion chamber special for marine diesel engine, combustion system and combustion method

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Embodiment Construction

[0025] The shape and structural parameters of the combustion chamber of a diesel engine are crucial to the airflow movement in the cylinder, the formation of the fuel-air mixture and the combustion process, and ultimately affect the performance and emissions of the diesel engine.

[0026] like figure 1 The structure of the combustion chamber 1 of the present invention is that the bottom of the combustion chamber 1 is provided with a boss 17 and a pit 15, and the boss 17 and the pit 15 are all arc wall surfaces, and the diversion slope 16 is connected with the boss 17 and the pit 15. The dimples 15 are tangential. The upper part of the combustion chamber 1 is provided with a constriction 14 , the lower part of the constriction 14 is connected with the pit 15 , and the upper part is connected with the stepped slope 13 . A vertical guide surface 12 is provided between the step slope 13 and the piston top surface 11 , and the vertical flow guide surface 12 has a circular arc tran...

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Abstract

The invention provides a combustion chamber special for a marine diesel engine, a combustion system and a combustion method, in order to solve the problem that oil and air are not mixed thoroughly dueto the fact that the structure of a necking W-shaped combustion chamber adopted in the prior art is unreasonable. The combustion chamber is characterized in that the combustion chamber comprises a W-shaped combustion chamber, a step inclined surface and a vertical diversion surface, wherein the step inclined surface and the vertical diversion surface are in arc transition connection with a necking part of the upper portion of the W-shaped combustion chamber in sequence, fuel oil moves upwards along the step inclined surface to be sufficiently mixed with air in the upper space of the W-shapedcombustion chamber, mixed fuel oil is obtained, then, the mixed fuel oil s guided through the vertical diversion surface to move in the direction of motion of an air cylinder, and the fuel oil does not impact the wall surface of the air cylinder. According to the combustion chamber, mixing of oil and air in the combustion chamber can be effectively facilitated, the high temperature zone and the high concentration oil-air zone are decreased, accordingly, emission of exhaust contaminant of the diesel engine is reduced, and clean combustion is achieved.

Description

technical field [0001] The invention belongs to the technical field of engine combustion, and in particular relates to a combustion chamber, a combustion system and a combustion method for marine diesel engines. Background technique [0002] With the popularization and application of high-pressure common rail fuel injection system in marine diesel engines, the traditional straight or narrowed ω-shaped combustion chambers of diesel engines can no longer meet the requirements of low emission in terms of guiding fuel oil and in-cylinder air movement. Therefore, it is necessary to rationally design the side wall of the combustion chamber to form effective squeeze flow and vortex flow, and improve the airflow movement intensity in the combustion chamber; and combine the fuel injection control strategy to guide the movement of fuel after hitting the wall. [0003] In order to reduce emissions, marine diesel engines adopt turbocharging technology, and increasing the boost pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B23/06F02F3/26F02D41/40
CPCF02B23/0624F02B23/0672F02D41/401F02D41/402F02D41/405F02F3/26Y02T10/12
Inventor 王鑫刘文斌聂志斌韩莉孟亮虎黄全有
Owner HENAN DIESEL ENGINE IND
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