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| Number | Title | Issue Date |
| 7455149 | Worm reduction gear and electric power steering apparatus A torsion coil spring 30 applies an elastic force to a worm shaft 29 in a direction towards a worm wheel, via a pre-load pad 70. The pre-load pad 70 restricts displacement in relation to the widthwise direction, by one side face portion o... | 11/25/2008 |
| 7455148 | Worm reduction gear and electric power steering apparatus A torsion coil spring 30 applies an elastic force to a worm shaft 29 in a direction towards a worm wheel, via a pre-load pad 70. The pre-load pad 70 restricts displacement in relation to the widthwise direction, by one side face portion o... | 11/25/2008 |
| 7443131 | Control device for electric power steering apparatus A control device for electric power steering apparatus, in which when torque ripples at the time of the rotation of a motor is reduced by simple arithmetic, smooth and safe assist limitation is performed without deteriorating steering feeling, is provided. For this ... | 10/28/2008 |
| 7441807 | Telescopic structure and steering column device for motor vehicle An automotive steering column apparatus has an inner column rotatably supporting a steering shaft, an outer column holding the inner column while rotatably embracing the inner column, a vehicle body side bracket having a vehicle body mount portion which can be mount... | 10/28/2008 |
| 7440829 | Steering angle estimating apparatus for vehicle The present invention provides a steering angle estimating apparatus for vehicle that can accurately determine a steady state at all the steering angles, and can estimate the steering angle as much as possible even in a non-steady state. In the steering angle estima... | 10/21/2008 |
| 7429216 | Vehicle steering device A vehicular steering apparatus, includes an input shaft for transmitting rotation from a steering wheel, an intermediate shaft including an upper intermediate shaft, a lower intermediate shaft and a buffer coupling for coupling the upper intermediate shaft and the l... | 09/30/2008 |
| 7423397 | Electric power steering device An electric power steering device to control a motor based on steering torque generated in a steering shaft and supply an auxiliary steering force conforming to the steering torque to the steering system. The device judges the state wherein the command current value... | 09/09/2008 |
| 7416199 | Steering device for motor vehicle There is disclosed a steering apparatus for a vehicle in which a steering power of a steering shaft is assisted by a column-assist type electric power steering apparatus so that the steering power is transmitted to steer the wheels by means of a steering mechanism, ... | 08/26/2008 |
| 7413051 | Electric power steering apparatus Since a nut 45 is provided with paths for connecting rolling paths 23b, 45f and circulating paths 45c, that is, return paths 45d at end caps 45b, 45b attached to both ends of ... | 08/19/2008 |
| 7412911 | Steering column apparatus A steering column apparatus includes: a stationary column member; a movable column member whose one end is supported on the stationary column member nonrotatably about a center axis and movably along the center axis; a column head disposed on the other end of the mo... | 08/19/2008 |
| 7404768 | Telescopic shaft for motor vehicle steering A telescopic shaft for vehicle steering has first and second torque transferring members. The first torque transferring member is interposed, with an elastic body in between, between axial grooves formed in an outer peripheral surface of a male shaft and an inner pe... | 07/29/2008 |
| 7401813 | Steering apparatus for motor vehicle In a steering apparatus for a vehicle in which an inner column is supported to be movable in the axial direction by an outer jacket supported by a body-side bracket and a steering shaft is fixed to an adjustment position by clamping the inner column by the use of te... | 07/22/2008 |
| 7397210 | Control unit for electric power steering apparatus In the present invention, only an abnormality of detection of a rotating direction of a motor is detected and therefore, with simple processing and by using a table for judging the abnormality of the detection of a rotating direction of a motor and the rotating dire... | 07/08/2008 |
| 7394214 | Control unit for electric power steering apparatus In order to solve a problem that a motor generates a noise so as to deteriorate an environment in a vehicle if a field weakening control is executed to the motor of a electric power steering apparatus, in the case that a vehicle speed is high, the same field weakeni... | 07/01/2008 |
| 7389851 | Electric power steering apparatus An electric power steering apparatus controlling an operation of an electric motor by a control unit based on a torque signal from a torque sensor and executing a steering assist of a steering shaft via a reduction mechanism. The control unit includes a power supply... | 06/24/2008 |
| 7382295 | Control unit for electric power steering apparatus Since an abnormality is judged by executing a square calculating process with respect to sin θ and cos θ for detecting an abnormality in an angular resolver, a processing time is elongated, and a burden to a CPU is great. Since the invention prepares a map which c... | 06/03/2008 |
| 7382105 | Motor driving device and electric power steering apparatus In a motor driving device where a motor having a winding wire with small inductance value is driven by a digital control means comprised of control means including a current command value calculating means, a current control means and a PWM control means whose sampl... | 06/03/2008 |
| 7367588 | Steering column device A steering column device comprises a bracket of the column body having mounting flanges with a cut-away groove opening in the backward direction of car body, a collar having a flange part and a cylindrical part, an elastically deformable ring which the cylindrical p... | 05/06/2008 |
| 7364197 | Steering column apparatus A steering column apparatus, includes: a fixed column member having a vehicle body attachment portion to be attached to a vehicle body; a column head supported by the fixed column member movably in a direction of a center shaft of the fixed column member; a wheel sh... | 04/29/2008 |
| 7360467 | Worm reduction gear and electric power steering apparatus A torsion coil spring 30 applies an elastic force to a worm shaft 29 in a direction towards a worm wheel, via a pre-load pad 70. The pre-load pad 70 restricts displacement in relation to the widthwise direction, by one side face portion o... | 04/22/2008 |
| 7357216 | Electric power steering apparatus A ball bearing 34 serving as a support reference for a pinion shaft 2 is located directly under a worm wheel 51. Thus, even when a temperature change occurs around the electric power steering apparatus, the engagement position between the worm w... | 04/15/2008 |
| 7354069 | Steering apparatus A steering apparatus includes: an inner column which rotatably supports a steering shaft; an outer jacket which incorporates the inner column shiftably in an axial direction, at least a portion of the outer jacket being cylindrical; and an urging member for urging t... | 04/08/2008 |
| 7345442 | Device for controlling electric-motor power steering device Distortions of motor voltage and current and a torque ripple of the motor are generated by dead band compensation for preventing an arm short circuit of an inverter, and a feeling of physical disorder is given in a handle operation. Therefore, the distortions of the... | 03/18/2008 |
| 7343254 | Resolver digital converter In a resolver digital converter comprising a resolver, a resolver digital conversion part, and an excitation signal generation part, the resolver digital converter for inputting an excitation signal generated in the excitation signal generation part to the resolver ... | 03/11/2008 |
| 7213484 | Steering column apparatus Disclosed here is a steering column apparatus that enables a single operation lever provided apart from the steering wheel and to be used for clamping/unclamping each of the telescopic mechanism and the tilting mechanism independently, as well as for keeping at leas... | 05/08/2007 |
| 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 |
| 7189918 | Electronic control unit An Electronic Control Unit which houses electronic circuit for controlling various devices of vehicles in a sealing case is characterized in that the case has a ventilation hole to communicate an interior and an exterior of the case, the ventilation hole comprises a... | 03/13/2007 |
| 7187154 | Motor drive apparatus and electric power steering apparatus The present invention provides a motor drive apparatus capable of calculating an angular velocity and a rotation angle accurately in the entire rotation velocity range of a motor using a cheap Hall sensor having an inferior accuracy without using an expensive resolv... | 03/06/2007 |
| 7183681 | Electric power steering apparatus In an electric power steering apparatus that generates an auxiliary steering torque by a brushless motor in response to a steering torque applied on a steering wheel and transmits it to an output shaft of a steering mechanism while reducing it by means of a reductio... | 02/27/2007 |
| 7045998 | Rotation detecting device A steering output part is fixed with a worm wheel for power assist. By a spur gear formed on the worm wheel, an input gear of a detecting unit is rotated with a speed increase. Within the detecting unit, provided is a speed-reducing mechanism for speed-reducing the ... | 05/16/2006 |
