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| Number | Title | Issue Date |
| 7721841 | Vehicular steering control apparatus and vehicular steering control method The ratio of the angular speed of a pinion shaft to the angular speed of a steering wheel is computed. The steering torque Tst transferred to the steering wheel is computed as a multiplication product of the ratio of angular speed and the steering torque Tm of the p... | 05/25/2010 |
| 7428944 | Drive train for a compressor and a hydraulic pump A drive train for a compressor and a hydraulic pump of a motor vehicle, and a method of use are described. The system includes a hydraulic power steering system, an electric superimposed steering system for providing steering assistance, and a motor vehicle drive mo... | 09/30/2008 |
| 7102314 | Brushless motor control apparatus having overheat protecting function A brushless motor control apparatus detects a phase current flowing in a brushless motor, converts the phase current to a vector current including a d-axis current of a magnetic flux direction component and a q-axis current of a torque direction component orthogonal... | 09/05/2006 |
| 7091686 | Electric power steering apparatus The atmosphere temperature calculator calculates an estimated atmosphere temperature value by subtracting a temperature rise amount of a temperature sensor which is calculated based on a motor drive detected current value from a detected temperature value of the tem... | 08/15/2006 |
| 7055643 | Apparatus for controlling a power-assisted steering gear in response to vehicle speed An apparatus (10) for helping to turn steerable wheels (12) of a vehicle comprises a hydraulic power-assisted steering gear (16). An electric motor (92) actuates the steering gear (16). A pump (84) supplies the steering gear... | 06/06/2006 |
| 6913106 | Vehicle steering system In a vehicle steering system, a steering mechanism includes an input section, and a steering section mechanically separated from the input section, and arranged to steer a vehicle. An actuating section includes a plurality of drive units for producing an actual torq... | 07/05/2005 |
| 6892605 | Hand wheel actuator having stationary hub A hand wheel actuator having a stationary hub is provided by a housing supporting a first shaft via bearings such that it is rotatable about its own axis. The first shaft has an upper end configured for attaching a hand wheel. The actuator also includes a position s... | 05/17/2005 |
| 6816765 | Motor-driven power steering control apparatus A motor-driven power steering control apparatus for determining pertinent timings for starting/stopping application of steering assist torque includes a motor for applying an assist torque, a sensor for detecting a steering torque, a driving unit for operating the m... | 11/09/2004 |
| 6808041 | Method and system for providing secondary vehicle directional control through braking A method for implementing directional control of a motor vehicle is disclosed. In an exemplary embodiment, the method includes determining whether a failure of a primary steering system of the motor vehicle exists. If a failure of the primary steering system exists,... | 10/26/2004 |
| 6705420 | Steering angle ratio control system and method A steering angle ratio control system is provided which includes a steering angle ratio varying mechanism capable of varying a steering angle ratio by an electric drive unit, and a controller for controlling the steering angle ratio varying mechanism based on a stee... | 03/16/2004 |
| 6612393 | Steering system for motor vehicles A steering system functions in accordance with the "steer by wire" concept and has a normal operating system without positive coupling between the steering handle and the steered vehicle wheels, as well as an emergency operating system, which functions wi... | 09/02/2003 |
| 6382342 | Hydraulically powered steering apparatus with electrically powered backup An apparatus (10) for turning the steerable wheels (17) of a vehicle in response to the turning of the steering wheel (12). The apparatus (10) includes a drive mechanism (16), a first motor (24), a second motor (74), a sensor (78) for sensing that the fir... | 05/07/2002 |
| 6367575 | Motor vehicle steering system A steering system for motor vehicles, in which a steering member or steering wheel and the steered vehicle wheels are hydraulically positively coupled for the steering actuation of the wheels. An additional servo system is provided which is responsive to ... | 04/09/2002 |
| 6213249 | Electric power steering apparatus An electric power steering apparatus for a vehicle includes a fail-safe circuit for, on the basis of an engine running-state signal from an engine running-state sensor, enabling an electric motor to be driven by a motor drive unit so that a steering assis... | 04/10/2001 |
| 6186259 | Automatic steering device for vehicles An automatic steering device for a vehicle is provided to prevent an automatically steered vehicle from going out of its predetermined locus of movement as a result of an abnormal output of a movement distance detecting device. An actuator control device ... | 02/13/2001 |
| 5273129 | Vehicle steering systems The invention relates to a vehicle steering system comprising a steering wheel (11), control signal generating means (12) responsive to the operation of the steering wheel (11), means for steering at least one vehicle wheel in response to control signals ... | 12/28/1993 |
| 5135069 | Vehicle rudder angle control apparatus Apparatus for controlling the steerable wheels of a power-assisted steering unit of a vehicle in which an angle detector is connected to the power assist unit and to a power controller. An abnormality detector is arranged between the steering shaft of the... | 08/04/1992 |
| 5080186 | Servo-assisted steering system for motor vechicles A servo assisted power steering system for motor vehicles comprising a steering-wheel shaft (2) which is connected via a rotary slide valve (6, 7, 8) and a worm-gear spindle (4) of a steering gear (5). The rotary slide valve controls the pressure impactin... | 01/14/1992 |
| 5068584 | Auxiliary device for handling failures of an actuating system of a linear electric actuator An auxiliary device for handling failures of an actuating system of a linear electric actuator, including an auxiliary drive device which works with a braking device, so that, in case of failure of said actuating system, the auxiliary drive device returns... | 11/26/1991 |
| 4624335 | Fail safe steering effort control system An actuator (7) for varying the degree of power assistance is connected with a main battery (8) through a first fuse (12) separate from a second fuse (13) which protects a controller (1) such as a microcomputer for controlling the steering effort in accor... | 11/25/1986 |
| 3954147 | Power steering pump with auxiliary electric motor drive A power steering system for a motor vehicle. The power steering system includes a power steering pump which is belt driven by the motor vehicle crank shaft. An auxiliary electric motor is provided for driving the power steering pump when the motor vehicle... | 05/04/1976 |
