| 摘要 |
972,618. Controlling motor vehicles. DAIMLER-BENZ A.G. Dot. 31, 1962 [Nov. 4, 1961], No. 41255/62. Heading B7H. [Also in Division F1] In a vehicle with power-assisted steering the hydraulic pressure which provides the power assistance is arranged to act on a piston 36 against spring pressure to increase the idling torque of the vehicle engine as the said hydraulic pressure increases to prevent stalling of the engine. As shown, accelerator pedal 8 forms part of linkage controlling the position of throttle valve 4 and fuel injection pump 6, engine idling being controlled by member 38 through roller 41 which contacts lever 11 of the linkage. The member 38 is responsive to both the gear-box condition and the hydraulic steering pressure. Engine-driven pump 19 supplies hydraulic fluid to steering control unit 33 which, in dependence on movements of steering wheel 29 varies the pressure of fluid supplied through pipe 35 to both the steering ram 32 and piston 36. Increasing hydraulic pressure on piston 36, opposing the pressure of spring 37, moves the piston and rod and the lower end of member 38 downwards, rotating the member about stop 39 and hence increasing the idling speed of the engine. Pump 19 also supplies hydraulic fluid to the control unit 2<SP>1</SP> of gearbox 2, which incorporates a plate clutch 16 and hydrodynamic clutch 15. On movement of lever 21 to engage drive hydraulic fluid is supplied through line 22<SP>1</SP> both to the ram which engages clutch 16 and through line 24 to close electro-hydraulic switch 26 and hence energize electromagnet 27 which moves pin 28, constituting the armature, downwards, pushing the upper end of member 38 to abut stop 40 instead of stop 39 and thus increase the idling speed and torque of the engine. Both pin 28 and the piston-rod of piston 36 may be adjustable in length and roller 41 may be adjusted in position on member 38. Specification 972,617 is referred to. |
