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Premixed combustion system of diesel engine

A pre-mixed combustion and diesel engine technology, which is applied to combustion engines, mechanical equipment, machines/engines, etc., to achieve the effects of reducing the maximum pressure in the cylinder, fully burning, and prolonging the ignition delay period

Inactive Publication Date: 2005-08-24
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

Since no effective method has been found, at present, premixed combustion can only be partially realized at low loads, and diffusion combustion is still used at higher loads.

Method used

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

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Embodiment Construction

[0011] exist figure 1 , 2 In the example shown: figure 1 There is no obvious difference in structure between the pre-mixed combustion diesel engine and the ordinary diesel engine. For example, the piston 1, the connecting rod 2 and the crankshaft 4 are the main moving parts, and the fixed parts and major systems have little change, but on the cylinder head A spark plug 6 has been added, and the intake cam 3 has also become relatively fat. The expansion ratio is increased from 17 to 22. figure 2 yes figure 1 The fuel supply, ignition, and gas distribution phase diagrams of the diesel engine shown clearly show that the diesel engine using premixed combustion has obvious characteristics: the intake retardation angle β is 80 degrees of crank angle; the geometric fuel supply advance angle θ is 90 degrees of crank angle; The spark plug ignition angle φ is 1 degree crank angle before top dead center. The intake advance angle α, exhaust advance angle γ and exhaust lag angle δ ar...

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Abstract

A diesel engine pre-mixing burning system has larger lagging angle of air feeding and geometric advancing angle of oil feeding, it has remarkably decreased compression ratio, loss of pumping air and the temperature of air compressed, prolonged combustion lagging period so that the burning point is controlled near the newtonian focus of compression stroke, in addition to the spark plug being lightened, the diesel engine is ensured to lighted in low compression ratio ; besides, the high expansion ratio has made full use of competence of apply work of air cylinder combustion gas. The pre-mixing method makes burning more complete and perfect, has high energy utilization ratio, decreases the highest pressure as well as highest temperature, plongs its service life and realizes the goal of highly effective cleaning of diesel engine burning.

Description

technical field [0001] The invention relates to a diesel engine premixed combustion system, which belongs to the field of internal combustion engine structure and combustion. Background technique [0002] As we all know, traditional diesel engine combustion belongs to heterogeneous mixed diffusion combustion. The inherent nature of this combustion method determines that there must be two contradictions between economy and emission, soot emission and NOx emission. For this reason, internal combustion engine workers have been trying to find a new efficient and clean combustion method that can solve the above-mentioned contradictions. In the early 1980s, from the perspective of improving the combustion and emission of diesel engines, the thermal premixed combustion method of diesel engines was formally proposed: before compression and ignition, all the fuel was injected into the cylinder to quickly form a homogeneous and lean mixture, and the ignition point was controlled. Nea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B23/02
CPCY02T10/125Y02T10/12
Inventor 隆武强冯立岩冷先银陈雷付磊
Owner DALIAN UNIV OF TECH
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