Valve train for engine and engine and vehicle having same

Abstract

The invention discloses a valve mechanism for an engine, the engine with the same and a vehicle. The valve mechanism for the engine comprises a valve mechanism, an intermediate swing arm, a lift adjustment mechanism, an adjustment shaft, a drive motor component and a cam shaft mechanism, wherein the intermediate swing arm is arranged at the top of the valve mechanism, a drive molded surface is constructed at the bottom of the intermediate swing arm, and the drive molded surface is suitable for driving the valve of the valve mechanism to move in the direction parallel to the central line of the valve; the lift adjustment mechanism comprises an adjustment shaft and a drive motor component, the adjustment shaft runs through the intermediate swing arm, and the drive motor component is used for driving the adjustment shaft to rotate around the axial line of the lift adjustment mechanism; the cam shaft mechanism is used for driving the intermediate swing arm to swing around the swing axial line, wherein the swing axial line is overlapped with the central axial line of the adjustment shaft. According to the valve mechanism for the engine, the adjustment shaft is simple in structure, and the valve lift consistency between cylinders is good.

Description

Technical field [0001] The present invention relates to the technical field of vehicles, and in particular to a valve train for an engine, an engine with the valve train for an engine, and a vehicle with the engine. Background technique [0002] In the related art, the valve train of the engine includes two types: the valve lift is fixed and the valve lift is variable. The valve lift is a fixed valve train. The size of the valve lift depends on the designed operating point and is determined by the shape of the cam. The engine adopts this valve train to change the engine load by adjusting the opening of the throttle valve. Under medium and small load conditions, the throttle opening is very small, and there is a large vacuum behind the throttle, causing large pumping losses in the engine's air exchange process, and there is room for improvement. [0003] The valve train with variable valve lift is divided into two types: continuously variable valve lift and non-continuous variable ...

AI Technical Summary

Problems solved by technology

Among them, the valve train with continuously variable valve lift adopts the eccentric wheel structure, the parts are in line contact, the contact area is small, the wear of the parts is large, and most of them depend on the adjustment of the eccentric shaft, and the parts are processed High precision, complicated process and high cost

[0004] Among them, the valve train with non-continuously variable valve lift, the valve lift cannot fully meet the requirements of the valve lift under different working conditions, and the change of the valve lift is sudden, and the continuity of the system is poor.

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