Lean-burn gasoline engine combustion device
A combustion device and gasoline engine technology, applied in the direction of combustion engines, internal combustion piston engines, mechanical equipment, etc., can solve the problems that the combustion system cannot meet the requirements, and achieve the goal of reducing the wetting of the cylinder wall, accelerating the combustion speed, and improving the level of tumble flow Effect
Pending Publication Date: 2019-03-19
CHINA FIRST AUTOMOBILE
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Problems solved by technology
In order to achieve stable combustion, lean-burn gasoline engines must combine direct injection and multiple injection strategies. At this time, higher requirements are put forward for the intake air flow, the arrangement of fuel injectors and spark plugs, and the matching of injector oil beams and pistons. , but the current combustion system cannot meet the requirements
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[0016] In conjunction with accompanying drawing, the present invention is further elaborated:
[0017] Such as figure 1 As shown, a lean-burn gasoline engine combustion system mainly includes two parts, a cylinder head 1 and a piston 2, and the cylinder head 1 includes a cylinder head combustion chamber 1-1, an intake port 1-2, an intake valve 1-3, Fuel injector 1-4, spark plug 1-5, exhaust valve 1-6 and exhaust passage 1-7; said intake valve 1-3, fuel injector 1-4, spark plug 1-5, exhaust valve 1-6 and exhaust port 1-7 are located at the top of cylinder head combustion chamber 1-1.
[0018] Such as Figure 4 As shown, the fuel injector 1-4 and the spark plug 1-5 are located on the top of the cylinder head combustion chamber 1-1, between the intake valve 1-3 and the exhaust valve 1-6, and are biased towards the exhaust side, and the fuel injection The central connection line 4 of the injector 1-4 and the spark plug 1-5 is parallel to the horizontal center line 3 of the cyli...
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Abstract
The invention discloses a lean-burn gasoline engine combustion device, and belongs to the technical field of internal combustion engines. Aiming at the fact that existing combustion systems cannot meet a requirement of stable combustion, the lean-burn gasoline engine combustion device adopts a cylinder cover combustor with a shielding structure arranged on the air inlet side of the lean-burn gasoline engine combustion device and a high compression ratio piston shape of which the top surface is protruded and an omega-shaped concave pit is formed in the center of the protrusion, so that the movement level of rolling flow in a cylinder is improved, the breakage of the rolling flow nearby a compressing top dead center is reinforced, the turbulence energy is improved, the burning velocity is accelerated, the knock risk is reduced, the phenomenon of fuel oil wetting a cylinder wall is reduced, and engine oil dilution and discharge are reduced. According to the rigorous positional relation between an oil atomizer and an ignition plug and negative electrode directional arrangement of the ignition plug, a pocket of oil of the oil atomizer nearby the compressing top dead center is ensured toform a rich mixture at the ignition plug, the pocket of oil wetting the ignition plug is avoided, stable ignition is realized, and combustion stability is ensured.
Description
technical field [0001] The invention belongs to the technical field of internal combustion engines, and in particular relates to a combustion device for a lean-burn gasoline engine. Background technique [0002] Under the pressure of energy saving and emission reduction and the impact of new energy vehicles, the pressure on traditional fuel vehicle manufacturers is increasing day by day. Improving the thermal efficiency of engines has become the focus of research by major automobile manufacturers. At present, the thermal efficiency of mainstream engines of domestic automobile manufacturers is in the range of 36-38%, and that of Japanese automobile manufacturers has reached above 40%. There is still room for further improvement in the thermal efficiency of gasoline engines, and lean burn technology is one of the effective means. In order to achieve stable combustion, lean-burn gasoline engines must combine direct injection and multiple injection strategies. At this time, hig...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02F3/26F02B23/08
CPCF02B23/08F02F3/26Y02T10/12
Inventor 王振喜陈海娥宫艳峰陈明段加全刘耀东钱丁超
Owner CHINA FIRST AUTOMOBILE