Valve bridge, valve mechanism, valve system and engine

The utility model discloses a valve bridge, a valve mechanism, a valve system and an engine, the valve bridge comprises a valve bridge body, a first execution pin and a second execution pin, the first execution pin is movably arranged at the first end of the valve bridge body, and the second execution pin is movably arranged at the second end of the valve bridge body. Due to the fact that the first execution pin and the second execution pin are located at the two ends of the valve bridge body respectively, actions executed between the first execution pin and the second execution pin cannot affect each other, the functionality of the valve bridge is increased, and the structure of a valve mechanism is simplified. 本实用新型公开了一种气门桥、配气机构、配气系统和发动机，气门桥，包括气门桥体、第一执行销和第二执行销，其中，所述第一执行销可活动设置在所述气门桥体的第一端，所述第二执行销可活动设置在所述气门桥体的第二端。由于上述第一执行销和第二执行销分居气门桥体的两端，因此，二者之间执行的动作并不会相互影响，从而增加了该气门桥的功能性，简化配气机构的结构。