System for adjusting height of moving block type tappet rod

Abstract

A system for adjusting height of a moving block type tappet rod in the technical field of mechanical design comprises a cylinder, a gas inlet pipe, a gas inlet valve, a gas exhaust valve, a gas exhaust pipe, an upright, a lever, a tappet, a volume chamber, a moving body, a through pipe, a moving block, a connecting pipe and a spring, wherein the moving body is mounted in the volume chamber and in sealed contact with the inner wall surface of the volume chamber; the through pipe penetrates through the upper wall surface and the lower wall surface of the moving body; the moving block is mounted in the through pipe and in sealed contact with the inner wall surface of the through pipe; the lower end surface of the moving block is a plane; the upper end surface of the moving block is an inclined surface; the right wall surface of the moving body is connected with the right wall surface of the volume chamber through the spring; and two ends of the connecting pipe are respectively communicated with the gas exhaust pipe and the left wall surface of the volume chamber. When the pressure in the gas inlet pipe is larger, the moving body moves to the right and the lift of the gas inlet valve is increased; and when the pressure in the gas inlet pipe is smaller, the moving body moves to the left and the lift of the gas inlet valve is reduced. The system for adjusting the height of the moving block type tappet rod, provided by the invention, has the advantages of reasonable design and simple structure and is suitable for systems with variable engine valve lifts.

Description

technical field [0001] The invention relates to an engine air intake system in the technical field of mechanical design, in particular to a moving block type tappet height adjustment system. 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 improving the high-speed power and low-speed torque of the engine. [00...

AI Technical Summary

Problems solved by technology

However, its design is to use a hydraulic mechanism, which requires high sealing performance. If the sealing is not tight, it will easily cause liquid leakage; and because the liquid has a certain compressibility, the response speed of the valve lift change has a certain delay.

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