Valve train for engine and vehicle with same

Abstract

The invention discloses a valve mechanism for an engine and a vehicle with the same. The valve mechanism comprises a vale gear, a rocker arm assembly, a first roller, a second roller, a cam shaft, a connecting arm and a phase adjusting mechanism. The bottom of the rocker arm assembly is provided with a driving type face which is directly in contact with the top of a valve to drive the valve of the valve gear to move. The first roller and the second roller can both be arranged on the rocker arm assembly in a pivoted mode. The cam shaft comprises an inner shaft and an outer shaft which are coaxially arranged, the inner shaft and the outer shaft are provided with an inner shaft cam and an outer shaft cam which can rotate along with corresponding shafts respectively, the outer shaft cam abuts against the first roller, and the inner shaft cam abuts against the second roller. The connecting arm is placed on the two sides of the rocker arm assembly respectively, the first end of the connecting arm is connected with the rocker arm assembly in a pivoted mode, and the second end of the connecting arm is arranged on an engine body set of the engine in a pivoted mode. The phase adjusting mechanism is used for adjusting the relative phase of the inner shaft and the outer shaft. The valve mechanism for the engine can achieve secondary opening of the valve, meanwhile, the duration time of opening of the valve can further be prolonged, the structure is simple and compact, and the influence on the height of the engine is small.

Description

Technical field [0001] The invention relates to the field of automobile construction, in particular to a valve mechanism for an engine and a vehicle with the same. Background technique [0002] The valve mechanism of the engine is used to drive the opening and closing of the valve. The valve valve phase is generally determined based on the local optimization of a narrow operating range of the engine. It is fixed during the working process, and the valve motion law is completely determined by the cam profile. . However, due to the single cam profile, the valve movement rules cannot be adjusted according to the actual operating conditions of the engine, and cannot be adapted to the different operating conditions of the engine at the same time. The fuel consumption is high, the emissions are poor, and it is not conducive to improving the power performance of the engine. The variable valve lift technology can only change the maximum lift of the valve opening, the change method is re...

AI Technical Summary

Problems solved by technology

However, due to the single cam profile, it is impossible to adjust the valve movement law according to the actual working conditions of the engine, and it cannot adapt to different operating conditions of the engine at the same time, resulting in high fuel consumption and poor emissions. The advanced variable valve lift technology can only change the maximum lift of the valve opening, the change method is relatively simple, and the structure is complex, there are many parts, and the control is cumbersome

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