| 摘要 |
PURPOSE:To make it possible to avoid such a phenomenon that the negative pressure downstream of a throttle valve increases, by shutting off inertial drive force from drive wheels by use of a one-way clutch when the opening degree of the throttle valve is decreased during running of a vehicle. CONSTITUTION:A one-way clutch 19 is disposed on a drive shaft 18 so as to drive a pinion 20. A counter shaft 21 provided thereon with stage gears 21a, 21b and an output shaft 22 fixed thereon with an output gear 22a and a wheel 4 are laid in parallel with the drive shaft 18. The rotation of a crank shaft 12 is transmitted to a driven pulley 16 from a drive pulley 15 through a V-belt 17 during running of a vehicle, then is transmitted from the drive shaft 18 to the drive pinion 20 through the one-way clutch 19, and is finally transmitted to the drive wheel 4 through the stage gears 21a, 21b, the output gear 22 and the output shafts 22. |
