Two-stroke diesel engine variable exhaust valve driving mechanism and control method thereof
A technology of driving mechanism and exhaust valve, applied in the direction of engine control, machine/engine, engine components, etc., can solve the problem of difficult gas distribution, and achieve the effect of less processing difficulty, low cost and easy assembly.
Active Publication Date: 2019-03-19
HARBIN ENG UNIV
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Problems solved by technology
However, due to the large size of the cylinder and the valve of the two-stroke diesel engine, the lift of the valve is larger than that of the gasoline engine and the small diesel engine, so it is very difficult to realize the fully variable gas distribution of the two-stroke diesel engine.
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[0028] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0029] combine Figure 1-6 , This two-stroke diesel engine exhaust valve electro-hydraulic flexible adjustment device includes a high-speed proportional reversing valve 1, a high-pressure oil pipe 2 between the common rail pipe and the proportional valve, a high-pressure common rail pipe 3, a low-pressure drain oil circuit 4, and a low-pressure connecting oil pipe. Line 5, low-pressure common rail oil line 6, low-pressure throttling oil line 7, oil plug 8, high-pressure replenishment oil line 9, high-frequency small flow fast solenoid valve 10, high-pressure oil inlet oil line 11, exhaust valve control unit shell Body 12, low-pressure oil drain circuit 13, high-frequency small-flow fast solenoid valve 14, low-pressure oil drain throttle passage 15, small piston 16, large piston 17, oil inlet passage 18, high-pressure oil pipe 19, air valve drive piston 20 , valve...
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The invention aims to provide a two-stroke diesel engine variable exhaust valve driving mechanism and a control method thereof. The two-stroke diesel engine variable exhaust valve driving mechanism comprises an exhaust valve control unit shell, a big piston, a small piston and an exhaust valve. The big piston and the small piston are installed in the exhaust valve control unit shell, a high-speedproportional directional valve, a first high-frequency small-flow rapid electromagnetic valve and a second high-frequency small-flow rapid electromagnetic valve are installed on the outer part of theexhaust valve control unit shell correspondingly, and the exhaust valve control unit shell is internally provided with a high-pressure oil inlet oil passage, a low-pressure oil draining throttling passage, a low-pressure throttling oil passage, a low-pressure oil draining oil passage and an oil inlet oil passage correspondingly. According to the two-stroke diesel engine variable exhaust valve driving mechanism, a high-speed on-off electromagnetic valve is driven by two electromagnetic coils and mechanically connected with an exhaust valve control unit main body, and no additional pipeline deign is needed. According to the two-stroke diesel engine variable exhaust valve driving mechanism and the control method thereof, the exhaust valve starting-stopping phase, the starting-stopping speed,the exhaust valve starting continuing period and the exhaust valve maximum lift are variable.
Description
technical field [0001] The invention relates to a diesel engine, in particular to an exhaust valve of a two-stroke diesel engine. Background technique [0002] As resource and environmental problems become more and more serious, higher and higher requirements are placed on the design indicators of internal combustion engines. Emission regulations for internal combustion engines are also getting stricter. As an important member of the internal combustion engine, the two-stroke diesel engine is also faced with the need to improve power performance and improve emissions. Variable gas distribution technology can break through the limitations of traditional internal combustion engines and greatly improve the performance of internal combustion engines. Although there are many studies on gasoline engines and four-stroke diesel engines, the gas distribution system of two-stroke diesel engines is very different from that of four-stroke diesel engines and gasoline engines. Gasoline...
Claims
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IPC IPC(8): F01L9/02F01L1/344F01L13/00F02D13/02F01L9/10F01L9/40
CPCF01L1/3442F01L13/00F01L13/0015F02D13/0242F02D13/0246F02D13/0253F02D13/0284F01L2001/34426F01L9/10Y02T10/12
Inventor 路勇李建苗立贤姚成文侯冬岩齐华岳潘振嘉
Owner HARBIN ENG UNIV