Engine valve variable timing system

Abstract

The invention discloses an engine valve variable timing system, which comprises a cylinder head, a valve, a cam and a control mechanism; the valve is arranged on the cylinder head and driven by the cam; Rotationally connected to the cylinder head, the projection of the convex part of the cam along the axial direction of the cam does not completely overlap; the control mechanism is connected between the cam and the cylinder head for driving the axial sliding of the cam and axial positioning of the cam; the present invention The advanced engine valve variable timing system, through the improvement of the cam shape and its installation structure, changes the opening time of the valve, realizes variable timing, simple structure, good running stability, and helps to save costs.

Description

Technical field [0001] The invention relates to an engine timing system, in particular to an engine valve variable timing system. Background technique [0002] The engine valve uses crankshaft power and chain sprocket drive to achieve opening and closing. During the intake stroke, the piston draws air into the cylinder for fuel injection and combustion, and the expanding gas pushes the piston to move to generate power, and then exhaust combustion exhaust gas to measure engine power The size parameter is "displacement", engine displacement = cylinder working volume × number of cylinders. In theory, the larger the cylinder volume, the more intake and the greater the output power, but the actual situation is that the intake process is subject to The valve opening and closing conditions are directly affected. The variable valve control device in the prior art reduces the valve opening by controlling the position distance between the crankshaft and the camshaft to provide less gas whe...

AI Technical Summary

Problems solved by technology

[0002] The engine valves are opened and closed by crankshaft power and chain sprocket transmission. During the intake stroke, the piston sucks air into the cylinder for fuel injection and combustion. The expanding gas pushes the piston to move and do work to generate power, and then discharges the combustion exhaust gas to measure the engine power. The size parameter is "displacement", engine displacement = cylinder working volume × number of cylinders, in theory, the larger the cylinder volume, the more air intake, the greater the output power, but the actual situation is that the intake process will be affected The direct impact of the opening and closing conditions of the valve, the variable valve control device in the prior art, when the engine is running at low speed, reduces the opening of the valve by controlling the position distance between the crankshaft and the camshaft to provide less gas , when the engine runs at high speed, the control device restores the valve opening to provide more gas, and realizes the economical operation of the internal combustion engine in this way. The valve control device complicates the internal structure of the engine and increases the cost of use

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