| 摘要 |
A vehicular speed change gear wherein a stepless V-belt transmission and a stepped gear transmission are disposed in series in a power transmission system connecting an engine crankshaft and a driving wheel together. An automatic speed change actuator, which automatically actuates the speed change operation of the stepless transmission in association with an engine throttle valve opening and a vehicle speed is connected to the stepless transmission, and a manual speed change actuator is connected to the stepped transmission for manually actuating the speed change operation of the latter. With these arrangements, the range of transmission ratio of the stepless V-belt transmission is set in a domain relatively high in transmission efficiency, and a shortage involved thereby of the transmission ratio is compensated with the range of transmission ratio of the stepped gear transmission, whereby a satisfactorily wide overall range of transmission ratio is thus obtainable without deteriorating the longevity of a V-belt, a high transmission efficiency is secured at all times as well, and a kickdown operation can be effected quickly. |
