Stratified compression ignition method in engine and fuel cylinder
An engine and fuel technology, applied in the direction of engine components, combustion engines, machines/engines, etc., can solve the problems of low compression ratio, disadvantage of unfavorable stratification, and poor retention, and achieve the effect of improving thermal efficiency
Active Publication Date: 2021-04-06
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology
[0002] The compression ratio of the existing ignition gasoline engine is much lower than that of the compression ignition diesel engine due to the limitation of knocking
Existing gasoline engines have relatively low thermal efficiency since the thermal efficiency of the engine is directly related to the compression ratio
[0003] At present, gasoline engines mainly use tumble flow stratification, because the tumble flow is easy to break during the compression process, and the retention is poor. The stratified mixed gas formed by the intake stroke often cannot be maintained until before ignition, making it difficult to form stable and suitable oil and gas near the spark plug. Mixed gas, not conducive to the advantages of stratification
Method used
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Embodiment Construction
[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings.
[0029] figure 1 It is a schematic diagram of the partial structure of the engine of the present invention. like figure 1 As shown, engine 10 includes sets of cylinders 11 , cylinder heads 12 , pistons 13 and injectors 14 . The engine 10 of the present invention is a gasoline engine, and the compression ratio of the engine 10 is 13-17, which is higher than that of the conventional gasoline engine.
[0030] The end of the cylinder 11 is closed and provided, and the cylinder head 12 is provided on the open end of the cylinder 11 .
[0031] The cylinder head 12 is provided with a spiral intake port 121 , a tangential intake port (not shown) and an exhaust port 123 . The spiral intake port 121 , the tangential intake port and the exhaust port 123 commun...
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An engine comprises a cylinder, a cylinder head, a piston and a fuel injector, the cylinder head is arranged on the cylinder, the piston is movably arranged in the cylinder, a combustion chamber is formed between the cylinder head and the piston, and the fuel injector is arranged on the cylinder On the cover, the fuel injector is used to inject fuel into the combustion chamber. The cylinder head is provided with a spiral intake port and an exhaust port. An exhaust gas guide is connected between the spiral intake port and the exhaust port. There is an exhaust gas control valve to control the flow of exhaust gas. When the engine is on the intake stroke, the exhaust gas and air pass through the spiral intake port to form a vortex mixed gas and enter the combustion chamber of the cylinder. The engine of the invention can avoid the knocking caused by the spontaneous combustion of the end mixture gas of gasoline fuel under the condition of high compression ratio, and improve the thermal efficiency. The invention also relates to a stratified compression ignition method in a fuel cylinder.
Description
technical field [0001] The invention relates to the technical field of engine compression ignition, in particular to an engine and a method for layered compression ignition in a fuel cylinder. Background technique [0002] The compression ratio of the existing spark ignition gasoline engine is much lower than that of the compression ignition diesel engine due to the limitation of knocking. Since the thermal efficiency of the engine is directly related to the compression ratio, the thermal efficiency of existing gasoline engines is relatively low. [0003] At present, gasoline engines mainly use tumble stratification. Because tumble flow is easy to break during the compression process and has poor retention, the stratified mixed gas formed by the intake stroke often cannot be maintained until ignition, making it difficult to form stable and suitable oil and gas near the spark plug. Mixed gas is not conducive to play the advantages of stratification. SUMMARY OF THE INVENTIO...
Claims
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IPC IPC(8): F02B75/12F02F1/42F02F1/24F02F3/00F02M26/01
CPCF02B75/12F02F1/242F02F1/4285F02F3/00F02M26/01F02B17/00F02B23/06F02F1/24F02F1/42F02M35/104Y02T10/12
Inventor 杜家坤陈泓李钰怀冶麟
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD