Valve spring tension-adjusting device

Abstract

The invention discloses a valve spring tension-adjusting device, and belongs to the technical field of engines. The valve spring tension-adjusting device comprises a lifting spring base which is movably installed below a valve spring, a through hole where a valve rod and a valve guide pipe penetrate through is formed in the middle of the lifting spring base, a cam shaft is installed below the lifting spring base, a support of the cam shaft is fixed on an air cylinder cover of the engine, a cam which is in contact with the lower portion of the lifting spring base is installed on the cam shaft, and an executing mechanism which controls the cam shaft to rotate is installed on the air cylinder cover of the engine. The valve spring tension-adjusting device further comprises a control circuit for controlling the executing mechanism to move. The control circuit comprises a rotation speed sensor and a controller, the rotation speed sensor is used for detecting the rotation speed of the engine, and the controller is connected with the rotation speed sensor. By means of the valve spring tension-adjusting device, the tension of the valve spring can be adjusted at different rotation speeds, the self mechanical energy consumption is reduced, and the energy-saving aim is achieved.

Description

technical field [0001] The invention relates to an engine energy-saving device, which belongs to the technical field of engines. Background technique [0002] The intake stroke and exhaust stroke of the engine work need the intake valve and exhaust valve to be opened and closed in time. The opening of the intake valve and exhaust valve is completed by the camshaft, and the valve is closed by the valve spring. elastic to complete. The rotating speed of existing engine is very high, and the tension force of valve spring is not adjustable, in order to guarantee the high rotating speed of engine, need to close valve in time quickly, prevents air leakage, usually the tension force of valve spring all sets very big. In order to open the valve when the engine is working, it must consume a certain amount of power to overcome the tension of the valve spring, especially when the engine is running at a low-to-medium speed, in order to overcome the excessive tension of the valve spring...

AI Technical Summary

Problems solved by technology

[0003] In addition, with the popularization of four-valve and more-valve structures, each cylinder has more than two intake valves and more than two exhaust valves, which greatly improves the efficiency of intake and exhaust when the engine is running at high speed, and increases However, the more the valves of the engine, the more the valve springs, the greater the mechanical energy consumed by the engine when it is running at medium and low speeds, and the problem is more prominent

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