| 摘要 |
<p>A transmission for use in a vehicle includes a main shaft connected to an engine and carrying a plurality of first gears fuxed thereto, and a countershaft connected to drive wheels and carrying as many second gears as the first gears, each through a roller clutch which is selectively engaged and disengaged by energizing and deenergizing an electromagnetic clutch. Each of the first gears meshes with one of the second gears to provide a predetermined gear ratio that is different from the gear ratios provided by the other pairs. When a shift lever is moved from first to second position, an electronic control unit disengages the roller clutch corresponding to the second gear corresponding to the first position, adjusts the engine speed to synchronize the pair of gears corresponding to the second position with the countershaft, and engages the roller clutch corresponding to the second gear corresponding to the second position. Gear change can thus be made without depressing the clutch pedal to disengage the torque transmission clutch connected to the clutch pedal.</p> |
