Upper-section sliding device for mechanical valve

Abstract

The invention discloses an upper-section sliding device for a mechanical valve in the technical field of the mechanical design. The upper-section sliding device for the mechanical air valve comprises an inlet channel, an outlet channel, a lower section of an inlet valve, an exhaust valve, an upper section of the inlet valve, a volume cavity, moving bodies, a through tube, moving blocks, a connecting tube and a spring, wherein the lower end surface of the first moving block and the lower end surface of the second moving block are both planes; the upper end surface of the first moving block and the upper end surface of the second moving block are both slopes; and the right wall surface of the first moving body is connected with the left wall surface of the second moving body via the spring. When pressure in the exhaust tube of the an engine is bigger, the first moving body moves leftwards, the second moving body moves rightwards, and the lifts of the inlet valve and the exhaust valve are largenedned; and when the pressure in the exhaust tube of the engine is smaller, the first moving body moves rightwards, the second moving body moves leftwards, and the lifts of the inlet valve and the exhaust valve are reduced. The upper-section sliding device disclosed by the invention has the advantages of reasonability in design and simple structure and is suitable for the lift variable system of the engine.

Description

technical field [0001] The invention relates to an engine intake and exhaust system in the technical field of mechanical design, in particular to a mechanical valve upper section sliding device. 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. ...

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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