| 摘要 |
PURPOSE:To prevent gear double lock by anticipating the gear double lock from the pressure of pressure fluid against a fluid actuator. CONSTITUTION:Gear double lock detecting means 78 is comprised of an amplifier section 83 for amplifying the signals from pressure sensors 71-75 through a strain amplifier circuit, comparing section 84 for comparing the output signal from said section 83 with a referential level, a deciding section 85 for receiving a higher pressure signal from said section 84 to decide whether higher pressure signals are provided simultaneously from friction engaging devices not to be engaged simultaneously at respective speed change stage, and an output section 86 for receiving a signal from said section 85 to provide a gear double lock detection signal to double lock preventing means 79. |
