| 摘要 |
PURPOSE:To improve safety at work in an oil hydraulically driven car having laterally independent two-system oil hydraulic transmissions, by inhibiting a driving signal of the transmission when the driving signal is simultaneously applied to the both transmissions. CONSTITUTION:A position detector 6 of a speed change lever 7 and position detectors 18, 28 of left and right steering pedals 19, 29 are connected to a steering control circuit 4, and a control signal is output from said circuit 4 to each solenoid driving circuit 17, 27 of left and right transmissions. This circuit 4 is constituted by equipping comparators 31R, 31L, which detect the depression of said pedals 19, 29 to enter a movable range, and arithmetic circuits 30R, 30L which output a voltage signal in accordance with an output characteristic with the voltage signal zero when the both pedals 19, 29 are depressed together to output a signal of level L from a NAND circuit 32. Then at simultaneous depression of the both pedals 19, 29, a vehicle, after gently decelerated, is stopped. |
