A two-stroke diesel engine variable exhaust valve driving mechanism and its control method
A technology of driving mechanism and exhaust valve, which is applied in the direction of engine control, machine/engine, engine components, etc., can solve the problems of difficult gas distribution, etc., and achieve the effect of small processing difficulty, reduced complexity, and easy assembly
Active Publication Date: 2021-07-13
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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Embodiment Construction
[0028] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0029] to 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, oil drain passage 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 driving piston 20, valve Rod 21, ...
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The purpose of the present invention is to provide a two-stroke diesel engine variable exhaust valve drive mechanism and its control method, including an exhaust valve control unit housing, a large piston, a small piston, and an exhaust valve, wherein the large piston and the small piston are installed in the exhaust valve. In the air valve control unit housing, the high-speed proportional reversing valve, the first high-frequency small-flow fast solenoid valve, the second high-frequency small-flow fast solenoid valve, and the exhaust valve control unit housing are respectively installed outside the air valve control unit housing. A high-pressure oil inlet oil circuit, a low-pressure oil discharge throttling passage, a low-pressure throttling oil passage, a low-pressure oil discharge oil passage and an oil inlet oil passage are respectively arranged in the body. The high-speed switching solenoid valve of the present invention is driven by two solenoid coils, and is mechanically connected with the main body of the exhaust valve control unit, and does not require additional pipeline design. The invention can realize that the opening and closing phase of the exhaust valve, the opening and closing speed, the opening duration of the exhaust valve and the maximum lift of the exhaust valve are fully 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...
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IPC IPC(8): F01L9/10F01L1/344F01L13/00F02D13/02F01L9/40
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