| 摘要 |
PURPOSE:To heighten the charging efficiency of a mixture in slow running to improve the output of an internal combustion engine provided with a throttle valve for regulating the flow rate of intake, by providing a connection pipe and an intake box downstream to the throttle valve in an intake passage. CONSTITUTION:An intake passage 18 is fitted with a carburetor 9 provided with a throttle valve 9a and a lead 19. An exhaust passage 17 is provided in the side wall of a combustion chamber 10. A connection pipe 22 branches downstream to the throttle valve 9a. An intake box 24 is secured on a frame 1. When an intake valve is closed, a mixture is stored in the intake box 24. In the process of intake, the mixture is injected into a combustion chamber 10. The charging efficiency of the mixture is thus heightened in slow running to improve an output characteristic. |
