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Wave-shaped combustion chamber

A wave-shaped, combustion chamber technology, applied to combustion engines, fuel injection devices, internal combustion piston engines, etc., can solve problems such as insufficient clearance volume utilization, and achieve the effects of improving fuel economy, reducing NOX, and improving economy

Inactive Publication Date: 2016-10-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the spray forms a dense mixing zone at the injection point and the clearance volume is not fully utilized, the invention provides a wave-shaped combustion chamber

Method used

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Embodiment Construction

[0030] figure 1 and figure 2 A schematic diagram of the structure of the wave-shaped combustor is shown at the top dead center and the starting moment of fuel injection at 5 / 4 waves. The fuel injector 6 sprays high-pressure fuel into the combustion chamber composed of the piston body 1 , the cylinder liner 2 and the cylinder head 3 in the form of a spray 7 . The spray 7 collides on the wave-shaped mist guide I surface 4a, the spray 7 after the collision is divided into two parts, a small part of fuel flows into the combustion chamber central part 5, and most of the fuel continues to expand to the combustion chamber periphery 9. The fuel oil that expands toward the periphery 9 of the combustion chamber passes through the wave-shaped back mist guiding surface 4b and the wave-shaped facing fog guiding surface 4c again, so that the spray volume is further expanded, and because the piston moves up and down, the position of the spray 7 sprayed on the guiding surface is different ...

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Abstract

A wave-shaped combustion chamber belongs to the field of power mixture forming and combusting. The wave-shaped combustion chamber is shallower than a general combustion chamber, and a wave-shaped guiding face is relatively flat. After sprayed mist collides with the guiding face, secondary diffusion is realized. Since the guiding angle of a fall point part of the sprayed mist is relatively small, a small number of sprayed mist diffuses to the center part of the combustion chamber, and a large number of sprayed mist diffuses to the periphery of the combustion chamber, so that the sprayed mist distribution range is increased greatly. A piston moves up and down, so that the collision position between the sprayed mist and the wave-shaped guiding face is changed. Oil and gas are mixed quickly in a relatively large space area to form a relatively thin mixture, so that the combustion of a diesel engine is improved effectively, the heat efficiency is improved, and emission of soot and NOX is reduced. Under the rated condition, compared with a combustion chamber of an original machine, the economy is improved by 4%, the soot emission rate is reduced by 40%, and the NOX emission rate is reduced by 10%.

Description

technical field [0001] The invention relates to a wave-shaped combustion chamber, which belongs to the field of formation and combustion of engine mixture. Background technique [0002] The shape of the combustion chamber is an important factor affecting the combustion of a diesel engine. Traditional ω-shaped and basin-shaped combustion chambers generally have the problem that fuel oil collides with the pit at the bottom of the piston to form a rich mixture area, resulting in local high-temperature and over-rich combustion in the combustion chamber of the diesel engine, making PM and NO X As the emission rises, the constriction will retain fuel, which reduces fuel utilization and fuel economy. In addition, the depth of the combustion chamber is not shallow enough, the height of the headspace is low, the clearance space is not effectively utilized, and the distribution of the mixture in the combustion chamber is very uneven, which also makes the combustion insufficient, resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B23/00F02M61/18
CPCF02B23/00F02M61/1806Y02T10/12
Inventor 隆武强田华田江平崔靖晨冯立岩杜宝国王洋肖鸽何爽陈晓瑜
Owner DALIAN UNIV OF TECH
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