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| Number | Title | Issue Date |
| 8087488 | Steering apparatus for vehicle that detects an anomaly of the connecting-disconnecting device between the steering wheel and the turnable wheels A steering-by-wire-type steering apparatus for a vehicle which can detect an anomaly of a connecting-disconnecting device which selectively connects and disconnects an input member on a steering wheel side and an output member on a turnable wheel side based on a ste... | 01/03/2012 |
| 7677351 | Electrohydraulic steering system An electrohydraulic steering system includes a steering unit, triggerable via a user control element, for supplying a steering motor with pressure fluid. As a function of the actuation of the user control element or as a function of an external signal, the steering ... | 03/16/2010 |
| 7493984 | Steering control apparatus and method for diagnosing cable attachment A steering control apparatus for a vehicle including a steering input unit movable to set a steering input, and a steering output unit arranged to output a steering output, the steering input unit being connected via a cable to a body of the vehicle, includes a stee... | 02/24/2009 |
| 7370552 | Mechanism for controlling toe angle of vehicle wheels A power transfer system is constituted under a simple construction (a worm gear, transfer rod integrally installed with a worm sector gear, and lower control arm), thereby improving the efficiency of the power transfer of the toe-angle controlling mechanism for vehi... | 05/13/2008 |
| 7341125 | Electric power steering apparatus The invention provides an electric power steering apparatus which can improve a steering feeling. In the electric power steering apparatus, in the case that once the electric abnormality is generated in the hardware such as the motor, the torque sensor or the like a... | 03/11/2008 |
| 7336456 | Control-motor system An objective is to detect a resolver malfunction without fail, using a low-cost resolver having the small number of the poles, and a control-motor system having advantage in small sizing and high-power outputting. In the control-motor system, the system for driving ... | 02/26/2008 |
| 7276873 | Fault-handling system for electric power steering system A fault-handling system for a 2-phase motor. When an electric motor is used for power assist in a steering system in a vehicle, malfunctions can cause loss of assist, and detectable vibration. The invention utilizes a 2-phase motor in such an application, and implem... | 10/02/2007 |
| 7272479 | Electrically operated power steering controller and adjusting method of driving electric current offset in this controller The invention proposes an electrically operated power steering controller for inputting a driving electric current offset value of higher accuracy and being able to make an offset correction of a driving electric current by using this driving electric current offset... | 09/18/2007 |
| 7236907 | Steering angle sensor assembly with pulse width modulated output signal A steering angle sensing system includes at least one steering angle sensing device for outputting an analog signal representative of a steering angle position of a steering wheel. A first processor is operably coupled to the at least one steering angle sensing devi... | 06/26/2007 |
| 7202621 | Power steering control device for monitoring reference voltage A power steering control device includes a torque sensor that detects a steering torque and outputs a torque signal having a torque neutral voltage is determined based on a predetermined reference voltage, a reference-voltage generator unit that generates the refere... | 04/10/2007 |
| 7199536 | Power steering device An electric power steering apparatus provides stable steering assist force by positively precluding actuation of an electric motor while it is rotating in a reverse direction, so as to prevent demagnetization of the electric motor. A motor reverse rotation detecting... | 04/03/2007 |
| 7178613 | Vehicle operating apparatus A vehicle operating apparatus which accelerates, decelerates and steers a vehicle in accordance with the operation of the operating lever is provided with a reaction force generating means which generates a reaction force opposing the operating lever, a current sens... | 02/20/2007 |
| 7164248 | Electric motor drive apparatus and motor-driven power steering system In an electric motor drive apparatus capable of reliably preventing adverse effects on an electric motor, when a control force detected by a torque sensor exceeds a predetermined value, a temperature storing unit stores a temperature detected by a thermistor at that... | 01/16/2007 |
| 7157877 | Brushless motor driving device A brushless motor driving device having a current detecting unit for detecting a phase-current of a brushless motor, a voltage detecting unit for detecting a phase voltage of the brushless motor, and a signal input portion to which the detection value of the phase-c... | 01/02/2007 |
| 7126238 | Method and device for driving an electric actuator unit A system for driving an electric actuator unit with a polarity-dependent actuation direction contains a driving unit with a voltage input, at least one polarity control input and two voltage outputs whose polarity depends on the polarity control signal at the polari... | 10/24/2006 |
| 7108096 | Vehicle control system with slow-in-turn capabilities and related method A control system with slow-in-turn capabilities for use with a self-propelled, steerable vehicle, such as a lawn mower, is disclosed. In one embodiment, the system slows the vehicle speed when turns are made beyond a predetermined range and the speed is at or above ... | 09/19/2006 |
| 7106012 | Electronic control unit, electric power-assisted steering device and transmission ratio-variable steering unit An electronic control unit for producing a sufficiently boosted voltage even when a supply voltage becomes high includes an inverter that drives switching elements and converts a DC voltage into an AC voltage, and booster means which boosts a DC voltage that is inpu... | 09/12/2006 |
| 7097520 | Steering system for small boat A cylinder unit is provided in a rear side of a boat body to rotate an outboard motor main body as a steering apparatus, and a pump unit is provided to drive the pump unit via a hydraulic pipe by a steering wheel in a driver's seat. A steering torque inputted to the... | 08/29/2006 |
| 7086495 | Transmission-ratio-varying steering apparatus A transmission-ratio-varying steering apparatus has a control circuit capable of storing a rotation angle between input and output shafts in a non-volatile memory when the generator outputs a surge voltage. The transmission-ratio-varying steering apparatus includes ... | 08/08/2006 |
| 7080711 | Motor-driven power steering apparatus In a rack and pinion type motor-driven power steering apparatus, the motor-driven power steering apparatus is provided with a rack position detecting means for detecting a position of the rack, a rack speed arithmetically operating means for calculating a moving spe... | 07/25/2006 |
| 7055644 | Power steering system with hydraulic power assistance A hydraulic power-assisted steering system, in particular for motor vehicles, has a hydraulic pump for generating hydraulic pressure for assisting the steering and an electromagnetic valve, in addition to a motor for driving the hydraulic pump. The hydraulic pump ca... | 06/06/2006 |
| 7049773 | Electric power steering apparatus An object of the present invention is to provide an electric power steering apparatus that can detect failure of a current detector quickly and with less misdetection using torque oscillation from a torque sensor. When the number of times N an absolute value of a di... | 05/23/2006 |
| 7049785 | Apparatus and method of controlling a stepper motor An apparatus and method of controlling a stepper motor, includes a torque calculator to calculate torque operated on the stepper motor and to output to a controller a driving current setting signal corresponding thereto. The controller outputs to a driver a control ... | 05/23/2006 |
| 7040450 | Power-assisted steering system A power-assisted steering system includes a current detector for detecting sequentially current flowing to a ground-side switching element in a lower arm by a detection resistor inserted into the lower arm not only in a time period when the switching element is ON b... | 05/09/2006 |
| 7036626 | Vehicle steering system for controlling a steering or steering lock angle of at least one wheel of a vehicle A vehicle steering system for controlling a steering or steering lock angle of at least one wheel of a vehicle having a steering handle or wheel, whereby the actual manual torque or force that is to be applied by the driver for controlling the vehicle being regulate... | 05/02/2006 |
| 7004279 | Vehicle steering system A vehicle steering system is provided with a primary steering system, a backup steering system and a control system that switches from the primary steering system to the backup steering system when a defect is determined in the primary steering system such as a defe... | 02/28/2006 |
| 6995567 | Failure detection system for electric power steering system The invention relates to a failure detection system for an electric power steering system. The system detects ON failure of one of first to fourth switching elements of an H-bridge circuit of the electric power steering system. The system detects ON failure by measu... | 02/07/2006 |
| 6949901 | System and method for controlling a steering position of rear vehicle wheels A system and a method for controlling a steering position of at least one rear wheel of a vehicle are provided. The vehicle has both a brushless electric motor with a plurality of electrical phase windings and a steering actuator. The brushless electric motor has a ... | 09/27/2005 |
| 6945352 | Force-based power steering system Apparatus and method is presented for enabling a power steering system comprising an accumulator, a reservoir, and an electronically controlled closed-center control valve assembly for selectively fluidly coupling the accumulator and reservoir to a double-acting pow... | 09/20/2005 |
| 6942057 | Feel control for active steering A method and apparatus for controlling the feel back torque of a motor provides for receiving a difference between a desired motor position and an actual motor position; filtering the difference into two or more frequency bands; and applying a gain to one or more of... | 09/13/2005 |
| 6909285 | Method for detecting failure of a relay A method for detecting failure of a relay operating in a vehicle having an ignition switch, a power supply, a capacitor, and a pre-charge circuit to pre-charge the capacitor with the relay switching power from the power supply to the pre-charged capacitor, the metho... | 06/21/2005 |
| 6907334 | Electric power steering apparatus An electric power steering apparatus for assisting the steering force of a steering member by an electric motor (18) driven by a driving circuit (13) connected to a power supply (P) by power connecting means (15a). The electric power stee... | 06/14/2005 |
| 6868933 | Variable transmission-ratio steering apparatus A variable transmission-ratio steering apparatus comprises an input shaft coupled to a steering wheel, an output shaft operatively coupled to steerable road wheels. The apparatus comprises an electric motor varying a rotation angle of the output shaft by providing a... | 03/22/2005 |
| 6803736 | Control system which carries out the model-supported safety monitoring of an electronically regulated controller in the motor vehicle A system for controlling a regulator equipped with an electric servomotor in a motor vehicle. With reference to an example of an electronic steering system that has an electric-motor steering regulator, output parameters are generated by a model-assisted monitor for... | 10/12/2004 |
| 6779626 | Electric power steering device The present invention provides an electric power steering device. The ECU of the device includes a microcomputer; a PWM signal generating circuit for generating a PWM signal according to the command value; a motor drive circuit for impressing a voltage corresponding... | 08/24/2004 |
| 6704628 | Method for detecting errors of microprocessors in control devices of an automobile The present invention relates to a method of error detection of a microprocessor in a control unit of an automotive vehicle, wherein a control unit can send and receive data by way of a data bus, wherein the output of the microprocessor is monitored by a ... | 03/09/2004 |
| 6691817 | Electrical power-assisted steering systems An electrical power-assisted steering system is disclosed comprising an electric motor connected through a gearbox to act on a steering mechanism of the vehicle, the electric motor having a plurality of phase windings connected to a star point and switchi... | 02/17/2004 |
| 6686835 | Rear wheel steering angle control apparatus A rear wheel steering angle control apparatus is provided with a rear wheel steering angle determining unit and a rear wheel steering mechanism so as to determine a steering angle ratio based upon vehicle speed and perform a rear wheel steering angle cont... | 02/03/2004 |
| 6540043 | Vehicle steering system with electronic power regulation unit for limiting the steering angle of rear wheels at high speeds A steering system for an automotive vehicle having two front wheels and two rear wheels is provided. The steering system includes a vehicle speed sensor; means for steering the front wheels at a desired steering angle; at least one steering angle sensor f... | 04/01/2003 |
| 6519518 | Method for detecting motor control loss in a power steering system A method for detecting a loss of motor control in an electric power steering system is disclosed. In an exemplary embodiment, the method includes determining a duty cycle of a steering command signal generated by a controller. The steering command signal ... | 02/11/2003 |
