Combustion system of compressed ignition gaseous propellant engine and composite air supply method thereof
A gas fuel, compression ignition technology, applied in the direction of gaseous engine fuel, combustion engine, internal combustion piston engine, etc., can solve the problems of low compression ratio and thermal efficiency, complex, high fuel consumption rate, to improve the compression ratio, simple structure, improve The effect of thermal efficiency
Inactive Publication Date: 2008-08-13
TIANJIN UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the disadvantages of complex structure, low compression ratio and thermal efficiency, and high fuel consumption rate in the prior art, and provide a simple structure, adopting compression ignition mode, no need to install an injection valve between the main and auxiliary combustion chambers, and can be large Significantly increase the compression ratio, realize lean combustion, improve thermal efficiency, reduce fuel consumption rate, and apply to single alternative gas fuel engines
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[0019] Below in conjunction with accompanying drawing, invention is described in detail:
[0020] In the figure, the combustion chamber of a compression ignition single alternative fuel engine includes a cylinder head 3, a working piston 10, an intake pipe 12 and a main combustion chamber 7 located between the top of the working piston and the cylinder head; Groove 13, the guide groove 13 is located on the top of the piston, guides the combustion gas injected from the secondary combustion chamber, and ignites the rarefied air in the main combustion chamber. The cylinder head 3 is provided with a divided auxiliary combustion chamber 8, the auxiliary combustion chamber 8 is a spherical vortex chamber, the volume ratio is selected at 30% to 40%, the effect is the best, and the compression ratio is 20 to 22; the inner surface of the auxiliary combustion chamber is coated with The high-temperature heat insulation layer 6, such as zirconia, silicon nitride, has a thickness of 0.2 mm...
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The present invention discloses one kind of compressing ignition gas fuel engine burning system and its composite gas supplying method with electric control unit to control the open time and sustained jetting time of high pressure and low pressure jetting valve. The burning system includes cylinder head, work piston, gas inlet pipe and main combustion chamber. The separated auxiliary combustion chamber set on the cylinder head has channel communicated with the main combustion chamber in the lower part, electric heating plug in the side and electric control unit controlled high pressure gas jetting valve in the upper part. The electric control unit controlled low pressure gas jetting valve is set in the gas inlet pipe. The present invention has simple structure, no need of setting jetting valve between the main combustion chamber and the auxiliary combustion chamber, compressing ignition, raised compression ratio and high heat efficiency.
Description
technical field [0001] The invention relates to a combustion system of a working piston internal combustion engine, in particular to a combustion system of a compression ignition gas fuel engine with an auxiliary combustion chamber, and a composite gas supply method for the combustion system. Background technique [0002] The current gas fuel engine mainly adopts the spark ignition combustion method, which has poor economy due to the low compression ratio and low intake efficiency. The compression ignition method has a higher compression ratio and intake efficiency than the spark ignition method, so it has better economy. However, the gaseous fuel of an internal combustion engine generally has a high ignition temperature, is difficult to compress and spontaneously ignite, and is prone to cylinder knocking under high compression ratio and premixed conditions. For this reason, people in the field have begun to study the combustion system of the compartment type compression ig...
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IPC IPC(8): F02B19/14F02B19/08F02B23/04F02B43/04
CPCY02T10/32Y02T10/125Y02T10/12Y02T10/30
Inventor 张惠明张德福郑清平张振明
Owner TIANJIN UNIV