Power-assisted or power-driven steering

BPERFORMING OPERATIONS TRANSPORTING B62Land vehicles B62DMOTOR VEHICLES TRAILERS

B62D5/00Power-assisted or power-driven steering

B62D5/001Mechanical aspects of steer-by-wire systems, not otherwise provided in B62D5/00 B62D5/003Backup systems B62D5/005means for generating torque on steering wheel B62D5/006power actuated B62D5/008Changing the transfer ratio between the steering wheel and the steering gear by variable supply of energy B62D5/02mechanical B62D5/04electrical B62D5/0403characterised by constructional features B62D5/0406including housing for electronic control unit B62D5/0409Electric motor acting on the steering column B62D5/0412the axes of motor and steering column being parallel B62D5/0415the axes being coaxial B62D5/0418Electric motor acting on road wheel carriers B62D5/0421Electric motor acting on or near steering gear B62D5/0424the axes of motor and final driven element of steering gear B62D5/0427the axes being coaxial B62D5/043characterised by clutch means between driving element B62D5/0433the clutch being of on-off type B62D5/0436the clutch being a controlled emergency clutch B62D5/0439Controllable friction clutches B62D5/0442Conversion of rotational into longitudinal movement B62D5/0445Screw drives B62D5/0448Ball nuts B62D5/0451Roller spindle drives B62D5/0454Worm gears B62D5/0457characterised by control features of the drive means as such B62D5/046Controlling the motor B62D5/0463for generating assisting torque B62D5/0466for returning the steering wheel to neutral position B62D5/0469End-of-stroke control B62D5/0472for damping vibrations B62D5/0475Controlling other elements B62D5/0478Clutches B62D5/0481monitoring the steering system B62D5/0484for reaction to failures B62D5/0487detecting motor faults B62D5/049detecting sensor failures B62D5/0493detecting processor errors B62D5/0496by using a temperature sensor B62D5/06fluid B62D5/061provided with effort, steering lock, or end-of-stroke limiters B62D5/062Details, component parts B62D5/063Pump driven by vehicle engine B62D5/064Pump driven independently from vehicle engine B62D5/065characterised by specially adapted means for varying pressurised fluid supply based on need B62D5/07Supply of pressurised fluid for steering also supplying other consumers; control thereof B62D5/075using priority valves B62D5/08characterised by type of steering valve used B62D5/081Seat valves B62D5/083Rotary valves B62D5/0832with elastic means other than a torsion bar B62D5/0835characterised by means for actively limiting the deflection angle B62D5/0837characterised by the shape of the control edges B62D5/087Sliding spool valves B62D5/09characterised by means for actuating valves B62D5/091Hydraulic steer-by-wire systems B62D5/092the electric motor being connected to the final driven element of the steering gear B62D5/093Telemotor driven by steering wheel movement B62D5/097Gerotor type B62D5/10characterised by type of power unit B62D5/12Piston and cylinder B62D5/14Rotary motor B62D5/16Expansible chamber with flexible wall B62D5/18characterised by power transmitting means B62D5/20specially adapted for particular type of steering gear or particular application B62D5/22for rack-and-pinion type B62D5/24for worm type B62D5/26for pivoted axles B62D5/28for pivoted bogies B62D5/30Safety devices B62D5/32for telemotor systems