| 摘要 |
A method for starting-gear engagement in a truck gearbox (16) with a main gear section unsynchronised on at least one of its gears, a split gear (50), and a planetary gear section (24) with low-speed and high-speed ranges. The split gear provided with synchromesh (52) is controlled by a three-position actuator (68) used for placing the split gear not only in low-split and high-split positions but also in a defined neutral position. When the truck comes to a halt, the clutch is disengaged and a gear selector (10) is placed in neutral, then the split gear is switched to neutral, while the main gearbox keeps a gear engaged. At the next start theA method for starting-gear engagement in a truck gearbox (16) with a main gear section unsynchronised on at least one of its gears, a split gear (50), and a planetary gear section (24) with low-speed and high-speed ranges. The split gear provided with synchromesh (52) is controlled by a three-position actuator (68) used for placing the split gear not only in low-split and high-split positions but also in a defined neutral position. When the truck comes to a halt, the clutch is disengaged and a gear selector (10) is placed in neutral, then the split gear is switched to neutral, while the main gearbox keeps a gear engaged. At the next start thereafter, the clutch is disengaged and a desired split-gear position is applied by means of the three-position actuator, with the split-gear synchromesh being used to brake the gearbox input shaft (20) with associated clutch plate (28). |
