Valve train for engine and vehicle having same

Abstract

The invention discloses an air distribution mechanism for an engine and a vehicle comprising same. The air distribution mechanism comprises an air valve mechanism, a rocker arm assembly, a first roller, a second roller, a first cam shaft, a second cam shaft, a connecting arm and a phase position adjusting mechanism which is used for adjusting relative phase positions of the first cam shaft and the second cam shaft; the bottom of the rocker arm assembly is provided with a driving profile surface; the driving profile surface is suitable for driving an air valve of the air valve mechanism to move along the direction which is parallel to the air valve central line; the first roller and the second roller are arranged on the rocker arm assembly in a pivot rotation mode; the first cam shaft is provided with a first cam and the second cam shaft is provided with a second cam; the first cam is abut against the first roller and the second cam is abut against the second roller; a first end of the connecting arm is connected with the rocker arm assembly in a pivot rotation mode; a second end of the connecting arm is arranged on an engine body group of the engine in a pivot rotation mode. The air distribution mechanism for the engine has the advantages of achieving opening of the air valve for a second time, meanwhile prolonging the continuous time for air valve opening and being simple in structure and few in part.

Description

technical field [0001] The invention relates to the field of automobile construction, in particular to a gas distribution 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 valves. The valve timing is generally determined based on the local optimization of a narrow working range of the engine. It is fixed during the working process, and the valve movement law is completely determined by the cam profile. . 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 a...

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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