| 摘要 |
<p>PURPOSE:To promptly perform speed change operation, by preferentially setting a speed change gear in a relation of shift down for a selected speed change gear of the plural speed change gears combined on a disconnected input shaft at a changeover of a clutch by a speed change instruction. CONSTITUTION:The captioned speed change gear comprises two input shafts 2, 3 connected through clutches 4, 5 to an engine driving shaft 1a, and the first and third shift speed change gears 14, 15 and a reverse shift speed change gear 16 are rotatably fitted to the input shaft 2. While the second and fourth shift speed change gears 17, 18 are rotatably fitted to the input shaft 3, and those above speed change gears 14-18 are to be selectively connected to the input shafts 2, 3 by sliding operation of selecting gears 19, 29, 22. Here the speed change gear is constituted such that at speed change operation, of the speed change gears 14-18 on the input shafts 2, 3 disconnected by the clutches 4, 5, the speed change gear in a relation of shift down is preferentially set fot the speed change gear selected in accordance with a running condition.</p> |
