Patent ID: 9441510
Filing Date: 2016-09-13
CPC Classification: F01L

Claim Text:
1. A valve system provided in a multi-cylinder engine including at least a pair of cylinders disposed adjacent to each other and discontinuous in ignition order and at least a pair of cylinders disposed adjacent to each other and continuous in ignition order, the valve system comprising: a cam shaft including a shaft section extending in a cylinder row direction and a plurality of cam element sections provided respectively in the cylinders and fit in the shaft section to be capable of rotating integrally with the shaft section and moving in an axial direction; and an operation mechanism that moves the plurality of cam element sections in the axial direction with respect to the shaft section, wherein each of the cam element sections having end portions and including, for each one valve of the cylinders, two cam sections which include a common base circle, have differently shaped nose sections and are adjacent to each other in the axial direction, end face cams are respectively provided at the end portions in the axial direction of each of the cam element sections, the operation mechanism includes a plurality of operation members driven by an actuator to be movable between an actuation position where the operation members rush into positions opposed to the end face cams of the plurality of cam element sections in the axial direction and a retracting position where the operation members retract from opposing positions of the end face cams, the operation mechanism engaging the operation members, which have moved to the actuation position, with the end face cams and moving the cam element sections in the axial direction to thereby switch the cam section that opens and closes valves of the cylinders, the plurality of operation members include: