A hydraulic steering unit (1) is described comprising a supply port arrangement having a pressure port (8) connected to a main flow path (6) and a tank port (T) connected to a tank flow path (7), a working port arrangement having a left working port (L) connected to a left working flow path (9) and a right working port (R) connected to a right working flow path (10), a bridge arrangement (14) of variable orifices having a first left orifice (A2L) connected to the main flow path (6) and to the left working flow path (9), a first right orifice (A2R) connected to the main flow path (6) and to the right working flow path (10), a second left orifice (A3L) connected to the left working flow path (9) and to the tank flow path (7), and a second right orifice (A3R) connected to the right working flow path (10) and to the tank flow path (7). Such a hydraulic steering unit should allow comfortable steering. To this end a measuring motor arrangement is arranged in one of the left working flow path (9) and the right working flow path (10), the measuring motor arrangement (15) having a first measuring motor (16) and a second measuring motor (17).

A hydraulic steering unit (1) is described comprising a supply port arrangement having a pressure port (8) connected to a main flow path (6) and a tank port (T) connected to a tank flow path (7), a working port arrangement having a left working port (L) connected to a left working flow path (9) and a right working port (R) connected to a right working flow path (10), a bridge arrangement (14) of variable orifices having a first left orifice (A2L) connected to the main flow path (6) and to the left working flow path (9), a first right orifice (A2R) connected to the main flow path (6) and to the right working flow path (10), a second left orifice (A3L) connected to the left working flow path (9) and to the tank flow path (7), and a second right orifice (A3R) connected to the right working flow path (10) and to the tank flow path (7). Such a hydraulic steering unit should allow comfortable steering. To this end a measuring motor arrangement is arranged in one of the left working flow path (9) and the right working flow path (10), the measuring motor arrangement (15) having a first measuring motor (16) and a second measuring motor (17).

In one embodiment, there is disclosed a modular, blast resistant suspension module for an armored vehicle. Each suspension module has a first and second axle assembly. The first axle assembly has a Short-Long Arm (SLA) suspension system pivotally connected to a blast resistant differential housing and the second axle assembly has a Road Arm (RA) suspension system pivotally connected to the differential housing. The suspension modules may be used to form 44 or 88 vehicle configurations.

In one embodiment, there is disclosed a modular, blast resistant suspension module for an armored vehicle. Each suspension module has a first and second axle assembly. The first axle assembly has a Short-Long Arm (SLA) suspension system pivotally connected to a blast resistant differential housing and the second axle assembly has a Road Arm (RA) suspension system pivotally connected to the differential housing. The suspension modules may be used to form 44 or 88 vehicle configurations.

An inner-plate cam ring side recess portion is formed in a cam ring side end surface of an inner plate, communicates with a columnar groove which is a center side space in a vane grooves, and supplies a working fluid to the columnar groove. The inner-plate cam ring side recess portion is divided into multiple sections between a first side discharge port, through which the working fluid is discharged at a first discharge pressure from a pump chamber, and a second side suction port through which the working fluid is suctioned into a pump chamber discharging the working fluid at a second discharge pressure. An angle of a separation portion in a rotation direction is smaller than or equal to an angle between the first side discharge port and the second side suction port.

In one embodiment, there is disclosed a modular, blast resistant suspension module for an armored vehicle. Each suspension module has a first and second axle assembly. The first axle assembly has a Short-Long Arm (SLA) suspension system pivotally connected to a blast resistant differential housing and the second axle assembly has a Road Arm (RA) suspension system pivotally connected to the differential housing. The suspension modules may be used to form 44 or 88 vehicle configurations.

In one embodiment, there is disclosed a modular, blast resistant suspension module for an armored vehicle. Each suspension module has a first and second axle assembly. The first axle assembly has a Short-Long Arm (SLA) suspension system pivotally connected to a blast resistant differential housing and the second axle assembly has a Road Arm (RA) suspension system pivotally connected to the differential housing. The suspension modules may be used to form 44 or 88 vehicle configurations.

An active steering system for an articulated bus is provided. In an assisted steering mode, a hydraulic turntable assists in the steering action of the articulated bus. While the articulated bus is linearly driven at a high speed or the lane-changing action is performed, the assisted steering mode can provide stable driving performance. In the assisted steering mode, a better steering trajectory is achieved while a cornering action of the articulated bus is performed. By collecting the information about the driving velocity, the position of the transmission gear and the position of the steering wheel, a steering force applied to the front frame and the trailer frame is calculated. Moreover, if the control unit judges that the angle of the hydraulic turntable is optimal, a locking force is generated to assure the optimal angle of the articulated bus. The assisted steering mode also supports the action of reversing the articulated bus. When the articulated joint is adjusted to an optimal trajectory, the articulated bus is reversed to the designated position.

An active steering system for an articulated bus is provided. In an assisted steering mode, a hydraulic turntable assists in the steering action of the articulated bus. While the articulated bus is linearly driven at a high speed or the lane-changing action is performed, the assisted steering mode can provide stable driving performance. In the assisted steering mode, a better steering trajectory is achieved while a cornering action of the articulated bus is performed. By collecting the information about the driving velocity, the position of the transmission gear and the position of the steering wheel, a steering force applied to the front frame and the trailer frame is calculated. Moreover, if the control unit judges that the angle of the hydraulic turntable is optimal, a locking force is generated to assure the optimal angle of the articulated bus. The assisted steering mode also supports the action of reversing the articulated bus. When the articulated joint is adjusted to an optimal trajectory, the articulated bus is reversed to the designated position.

Provided is a power steering device capable of causing control that uses a pump device and control that uses an electric motor on an input shaft to cooperate with each other. The power steering device includes a power cylinder including a pair of hydraulic chambers partitioned by a piston and configured to generate a steering assist force for a steered wheel, a pump device configured to be driven through control by a first electric motor and configured to discharge working fluid, a rotary valve configured to selectively supply the working fluid supplied from the pump device to the pair of hydraulic chambers in accordance with relative rotation between the input shaft and the output shaft, a second electric motor provided so as to surround at least a part in an axial direction of the input shaft and configured to control the rotation of the input shaft, and a second electric motor control part installed in a control device and configured to output a control signal for controlling driving of the second electric motor based on a revolution number signal of the first electric motor.