Pneumatic engine valve control mechanism

Abstract

The invention discloses a pneumatic engine valve control mechanism, and belongs to the technical field of internal combustion engines. The pneumatic engine valve control mechanism comprises a lower intake valve section, a middle intake valve section, an upper intake valve section, a control body, a fixed body, through pipes, an elastic part, a rotating plate, a rotating shaft and a first connecting pipe, wherein the middle intake valve section penetrates through the rotating shaft; four cavities are formed in the rotating shaft; the middle intake valve section is provided with four ribs; the four ribs of the middle intake valve section are arranged in the four cavities of the rotating shaft respectively; a rotating block is connected with the wall surface of the top end of the second through pipe through the elastic part; the two ends of the first connecting pipe are communicated with the first through pipe and an intake pipe of an engine respectively; the two ends of the second through pipe are communicated with the second through pipe and an turbine exhaust pipe. According to the pneumatic engine valve control mechanism, when pressure in the first through pipe is higher, the middle intake valve section rotates clockwise, the valve lift is increased, and the air inflow of the engine is increased; the pneumatic engine valve control mechanism is reasonable in design, simple in structure and applicable to the design of an intake valve lift continuously variable system.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and specifically relates to a pneumatic engine valve control mechanism capable of realizing continuously variable intake valve lift on the principle of pneumatics. Background technique [0002] The valve lift of the traditional gasoline engine is fixed and invariable, that is, there is only one cam profile of the camshaft, which makes it impossible for the lift to make the engine respond well in both high-speed and low-speed areas. The valve lift or cam profile design of a traditional gasoline engine is a balanced choice for the engine under all operating conditions. As a result, the engine can neither get the best high-speed efficiency nor the best low-speed torque, but it can get The most balanced performance under all working conditions. The adoption of variable valve lift enables the engine to obtain the required valve lift in both high-speed and low-speed areas, thereby ...

AI Technical Summary

Problems solved by technology

However, its design requires a special control structure, and the entire system structure is complex

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