An autonomous steering control unit for a hydraulic steering control system has a pilot selector valve, primary and secondary electro-hydraulic (EH) steering valves, and an output selector valve. In a primary autonomous steering mode, the primary EH steering valve operates to output pilot fluid from the pilot selector valve through the output selector valve to the steering control system to control steering of a work machine while the pilot selector valve and the output selector valve isolate the secondary EH steering valve from the steering control system. In a secondary autonomous steering mode, the secondary EH steering valve operates to output pilot fluid through the output selector valve to the steering control system while the primary EH steering valve is isolated from the steering control system. In alternative embodiments, a load sense selector valve alternately connects an dynamic load sense line to the operative steering valve.

A vehicle auxiliary control apparatus includes: an auxiliary steering assembly, including: a frame; an auxiliary steering shaft mounted for rotation in the frame; an auxiliary steering wheel mounted to the auxiliary steering shaft; first and second cable spool assemblies mounted to the auxiliary steering shaft; and first and second cable assemblies coupled to the first and second cable spool assemblies, respectively; and coupling means for coupling the first and second cable assemblies to a stock steering shaft of a motor vehicle, such that rotation of the auxiliary steering shaft causes rotation of the motor vehicle steering shaft.

A vehicle auxiliary control apparatus includes: an auxiliary steering assembly, including: a frame; an auxiliary steering shaft mounted for rotation in the frame; an auxiliary steering wheel mounted to the auxiliary steering shaft; first and second cable spool assemblies mounted to the auxiliary steering shaft; and first and second cable assemblies coupled to the first and second cable spool assemblies, respectively; and coupling means for coupling the first and second cable assemblies to a stock steering shaft of a motor vehicle, such that rotation of the auxiliary steering shaft causes rotation of the motor vehicle steering shaft.

The present disclosure relates to a hydraulic steering device of an agricultural work vehicle comprising a steering pump for supplying a working fluid; an automatic steering unit which uses the working fluid to change the traveling direction of the agricultural work vehicle when automatic steering is performed by a control unit; a manual steering unit which uses the working fluid to change the traveling direction of the agricultural work vehicle when manual steering is performed by operating a steering handle; and an automatic cut-off unit which is for selectively cutting off the supply of the working fluid for the automatic steering to a steering cylinder of the agricultural work vehicle according to whether the manual steering is performed.

A steering column assembly includes a steering column shaft having a first end and a second end. The steering column assembly also includes an intermediate shaft coupled to the steering column shaft first end. The steering column assembly further includes a steering input pinion coupled to the intermediate shaft. The steering column assembly yet further includes a counter rotation mechanism causing a non-rotational condition of at least a portion of the steering shaft via counter rotational movement of the steering column assembly during rotation of the steering input pinion.

A steering column assembly includes a steering column shaft having a first end and a second end. The steering column assembly also includes an intermediate shaft coupled to the steering column shaft first end. The steering column assembly further includes a steering input pinion coupled to the intermediate shaft. The steering column assembly yet further includes a counter rotation mechanism causing a non-rotational condition of at least a portion of the steering shaft via counter rotational movement of the steering column assembly during rotation of the steering input pinion.

A vehicle (12) operable in manual and autonomous modes has a manual steering control unit (10) movable between a stowed position and an operative position. Movement of the steering control unit (10) as it transitions between stowed and operative positions comprises at least a component in a lateral direction of the vehicle so that when not in use, it is located laterally outside the free interior volume of the vehicle cabin (14) in the stowed position. The manual steering control unit (10) can be received within a recess (18) in a side wall region (16) of the vehicle cabin or in a central console in the stowed position.

A vehicle (12) operable in manual and autonomous modes has a manual steering control unit (10) movable between a stowed position and an operative position. Movement of the steering control unit (10) as it transitions between stowed and operative positions comprises at least a component in a lateral direction of the vehicle so that when not in use, it is located laterally outside the free interior volume of the vehicle cabin (14) in the stowed position. The manual steering control unit (10) can be received within a recess (18) in a side wall region (16) of the vehicle cabin or in a central console in the stowed position.

A system for hydraulic parallel work systems is provided. The system includes a fixed displacement pump (110), a closed-center circuit (300), an open-center hand metering unit (HMU) (200), and a tank (120). The closed-center circuit is in fluid communication with the fixed displacement pump. The open-center HMU is in fluid communication with the fixed displacement pump at an inlet port (204) of the HMU. The tank is fluidly connected to the inlet port of the HMU when the HMU is inactive.

A system for hydraulic parallel work systems is provided. The system includes a fixed displacement pump (110), a closed-center circuit (300), an open-center hand metering unit (HMU) (200), and a tank (120). The closed-center circuit is in fluid communication with the fixed displacement pump. The open-center HMU is in fluid communication with the fixed displacement pump at an inlet port (204) of the HMU. The tank is fluidly connected to the inlet port of the HMU when the HMU is inactive.