Camshaft assembly of engine with variable valve opening duration

Abstract

The invention discloses a camshaft assembly of an engine with variable valve opening duration and aims to improve the inflating efficiency of the engine. The camshaft assembly comprises a group of valve opening duration control units of which the number is matched with that of cylinders of the engine, a camshaft and a variable gas distribution phase position control mechanism, wherein the valve opening duration control units are matched with the camshaft; the camshaft is a spline shaft; and the variable gas distribution phase position control mechanism is arranged at an input end of the camshaft. The camshaft assembly has the characteristics of stable performance and wide application range; and the valve opening duration and the opening and closing time can be adjusted according to working conditions of the engine, so that the inflating efficiency of the engine is optimal under various working conditions, and the dynamic property, economy and an emission index can be improved.

Description

technical field [0001] The invention relates to an engine camshaft assembly, in particular to a camshaft assembly capable of adjusting the gas distribution phase and valve opening duration of an automobile engine, and belongs to the technical field of engines. Background technique [0002] With the increasingly severe situation of global oil and energy, it has become an urgent task to maximize the thermal efficiency of automobile engines and improve fuel economy in order to slow down the excessive consumption of energy. [0003] Improving the charging efficiency of the engine is an effective way to improve the power and economy of the vehicle. At present, VVT technology (variable valve timing system) has been widely used in the engine. The existing technology only adjusts the valve timing according to the different working conditions of the engine, that is, Adjust the opening and closing timing of the intake and exhaust valves to increase the amount of air entering the combu...

AI Technical Summary

Problems solved by technology

[0003] Improving the charging efficiency of the engine is an effective way to improve the power and economy of the vehicle. At present, VVT technology (variable valve timing system) has been widely used in the engine. The existing technology only adjusts the valve timing according to the different working conditions of the engine, that is, Adjust the opening and closing timing of the intake and exhaust valves to increase the amount of air entering the combustion chamber, which can effectively improve the power of the engine and make the fuel burn more fully; When the load is heavy, more air intake is required, and the duration of the valve opening is longer at this time. The existing VVT technology cannot meet the requirements. Under complex and changeable engine operating conditions, it is difficult to fully engine power and economy.

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