| 摘要 |
PURPOSE:To simplify the structure and to reduce its cost, by a method wherein the valve arm of a suction valve is formed in a fork, and the one side and other side of the fork open and close the suction valve, a gas valve respectively. CONSTITUTION:A gas valve 10, which is open to the interior of an intake air port 8, is mounted, and according to the lift of in intake air valve 2 and the gas valve 10, the intake air and fuel gas are supplied to a cylinder. The intake air valve 2 and the gas valve 10 are driven by one arm 4A and other arm 4B, of a valve arm 4 formed in a fork, respectively. This enables the intake air valve 2 and the gas valve 10 to be driven by the united arm, simplifies the structure, and reduces the number of parts. |
