PROBLEM TO BE SOLVED: To provide a steering control device for a vehicle capable of simulating the steering reaction force for the portion corresponding to a turbulence accurately in calculating the steering reaction force command value even if the steering side control has a strong stability against the turbulence and little difference is generated between the target steering angle and the actual steering angle. SOLUTION: The steering control device for the vehicle is embodied on the steer-by-wire system free of a mechanical bond between a steering reaction force device 3 having a steering wheel 1 and an actuator 2 for the steering reaction force and a steering device 7 having steered wheels 4 and 5 and is equipped with a controller 10 for the steering reaction force device to calculate the steering reaction force command value to the actuator 2 for the steering reaction force by adding the equivalent to the turbulence to the portion corresponding to the input/output, wherein the controller 10 for the steering reaction force device is formed as a means to make the turbulence presumptive value presumed by the use of a robust compensator 18b adopted in the steering angle control a turbulence equivalent and feeds back only the presumed turbulence equivalent from the steering side to the reaction force side. COPYRIGHT: (C)2005,JPO&NCIPI

Steering control device for vehicle

A control computing unit blends a feedforward axial force and a feedback axial force at an allocation ratio, based on an axial force difference, a lateral acceleration, a vehicle velocity, a steering angle, and a steering angular velocity so as to set a final axial force. Then, the control computing unit applies a steering reaction force based on the final axial force that has been set.

Steering control device

PROBLEM TO BE SOLVED: To surely and quickly operate a back-up system for a steer-by-wire type steering device for a vehicle. SOLUTION: This steering device for the vehicle generates a rudder turning power from a rudder turning actuator in response to a steering amount of a steering handle 21, and the rudder turning power is transmitted from the steering handle to a rudder turning mechanism, and a rudder turning wheel is turned by the rudder turning mechanism. The steering shaft 22 provided on the steering handle and an input shaft provided on the rudder turning mechanism are connected with a planetary gearing mechanism 51. The planetary gearing mechanism is constituted in such a manner that a planetary gear 72 is engaged with a sun gear 71, the planetary gear is engaged with an internal gear 73, and the planetary gear is rotatably attached to a carrier 74. The internal gear is connected with the steering shaft, and the carrier is connected with the input shaft through a first connecting shaft 52, and the planetary gearing mechanism is equipped with a locking mechanism 80. The locking mechanism normally keeps the sun gear under a rotatable state, and at the same time, locks the sun gear under a stopped state when a locking signal is received. COPYRIGHT: (C)2005,JPO&NCIPI

Steering device for vehicle

Disclosed is a vehicle steering apparatus (1; 301) equipped with a control device (12; 322) which controls the actuation of an electric motor (18; 317). First and second housings (23, 24 325, 312), which are in contact with each other, partition off an accommodation chamber (100; 324) which contains the control device (12; 322). The first housing (23; 325) is at least one part of the motor housing (25; 323). The first housing (23; 325) includes a first interior wall surface (101; 401) which partially partitions the accommodation chamber (100; 324). The second housing (24; 312) includes a second interior wall surface (102; 402) which partially partitions the accommodation chamber (100; 324). The first and the second interior wall surfaces (101, 102; 401, 402) are opposite each other with respect to the axial direction (X1) of a rotatable shaft (37; 352) of an electric motor (18; 317). The second interior wall surface (102; 402) includes the flat annular surface that surrounds a central axis (C1) of the rotatable shaft (37; 352) and an extension (C2) of the central axis (C1). The flat circular surface is orthogonal to the central axis (C1) and the extension (C2) of same.

Vehicle steering device

A power steering apparatus includes: a steering mechanism connected with a steering wheel; a transmitting mechanism connecting the steering mechanism and a steered wheels; a motor arranged to drive the transmitting mechanism based on a torque inputted to the steering mechanism to provide a steering assist force to the steered wheels; a motor control section configured to output a drive signal to the motor in accordance with the steering assist force; a motor reverse rotation judging section configured to judge a reverse rotation state of the motor when an actual rotation direction of the motor does not correspond to a direction in which the motor is rotated by the driving signal from the motor control section; and a damping torque adding section configured to damp a torque generated in the motor when the motor reverse rotation judging section determines the reverse rotation state of the motor

Power steering apparatus

A vehicle steering device includes a cable, a pulley, and a securing portion The cable transmits movement of an operating unit operated by a driver to a turning unit that turns a steering control wheel The pulley winds up the cable The securing portion secures an end of the cable to the pulley A restricting member is provided at the pulley The cable is wound up along a winding groove, which is formed in an outer peripheral surface of the pulley As the pulley is rotated, the cable is brought into contact with the winding groove by the restricting member The restricting member is disposed at a location that is separated from the securing portion along the winding groove by a predetermined length

PROBLEM TO BE SOLVED: To provide a vehicular steering device capable of suppressing the displacement of a steering wheel and the deviation of the locus of a vehicle from a traveling line to be small in an operational mode switching transition stage before shifting to the backup operational mode when malfunction is detected in a steering reaction force actuator. SOLUTION: The vehicular steering device comprising clutch mechanisms 5 and 6 which mechanically disconnect a steering wheel 1 from turning wheels 3 and 3 in normal situations, and mechanically connect them in malfunction situation, and a steering control means to perform drive control of a steering reaction force actuator 8 and a steering gear unit actuator 11 further comprises a steering reaction force actuator malfunction detection means to detect malfunction in the steering reaction force actuator 8. The steering control means limits the control command to the steering gear unit actuator 11 to when mechanical connection of the steering wheel 1 with the turning wheels 3 and 3 by the clutch mechanisms 5 and 6 is completed from when malfunction is detected in the steering reaction force actuator 8. COPYRIGHT: (C)2005,JPO&NCIPI

Vehicular steering device

In a steering control system comprising a steering component having a steering wheel and a steering reaction force actuator, a turning component having vehicle turning wheels and a turning actuator, and a backup mechanism for alternately mechanically separating and linking the steering and turning components, there is provided a steer-by-wire control unit selectively separated from the backup mechanism for executing steer-by-wire control of the turning actuator to a turning angle corresponding to the steering condition and control of the steering reaction force actuator for imparting steering reaction force corresponding to the turning condition, a steering assistance control unit selectively linked to the backup mechanism for executing steering assistance control for at least one of the steering reaction force actuator and the turning actuator, and a control switching unit for controlling a shift, upon attainment of predetermined conditions, between control by the steer-by-wire control unit and control by the steering assistance control unit The control switching unit, upon the shift of control, between the time of a separation/linkage command to the backup mechanism and the time of completion of separation/linkage, selectively sets as the correction amount the variation equivalence of the turning torque to be applied to the turning wheels of a vehicle after the completion and selectively executes correction of turning torque

Steering control system

The present invention provides an automotive steer-by-wire device that reduces occurrence of mis-engagement that has plagued previous devices. The automotive steering device of the present invention is equipped with a backup unit that engages and releases, an operating unit and a rotary steering unit, wherein the backup unit includes a backup clutch, configured by an outer ring, an inner ring, and rollers. The rollers are provided so as work with one with a lower rotational speed between the outer ring and the inner ring, in a state that the rollers release the outer ring and the inner ring.

Automotive steering device

A steering apparatus is provided for reducing its size by reducing a load applied to a driving unit, and configuring an electrically operated tilt mechanism which is small in size and easily mounted on a vehicle. A driving unit adjusting a relative position of a steering column to a fixing bracket, and a biasing member (e.g., tension coil spring) having one end supported on the fixing bracket, and holding the steering column at a predetermined neutral position when the driving unit is not actuated, are provided, so that the driving unit adjusts the steering column to be placed at a tilt position with a desired tilt angle relative to the fixing bracket.

Naotaka Chino

Papers

Steering device for vehicle

Vehicular steering device

Steering control system

Automotive steering device

Steering apparatus for a vehicle