| 摘要 |
PURPOSE:To expedite speed change by detecting the oscillating speed of a change lever from the change of output voltage of a stroke sensor corresponding to the oscillating position of the change lever, and increasing the operating speed of a pneumatic actuator in the case of the oscillating speed being high. CONSTITUTION:The moving speed of a change lever 20 is detected by the differential processing of stroke sensor output voltage. In the case of a driver operating a change lever 20 in a hurry, pressurized air from an air tank 52 is fed by a solenoid change-over valve 63 onto the transmission 36 side, with air pressure of large specified value through a pressure reducing valve 61. As a result, air pressure of large value is fed to a pneumatic shift cylinder 40 and a pneumatic selector cylinder 46 so as to expedite the gear change of a transmission 36. In the case of operating at ordinary speed, pressurized air from the air tank 52 is fed by the solenoid change-over valve 63 onto the transmission 36 side, with air pressure of standard specified value through a pressure reducing valve 60. As a result, the gear change of the transmission 36 becomes ordinary. Gear change can be thereby made coping with the demand of the driver. |
