Honda Giken Kogyo Kabushiki Kaisha

Mitsui Toatsu Chemicals, Incorporated

Nippon Petrochemicals Company, Limited

Daiichi Pharmaceutical Co., Ltd.

Masaru Abe

Takashi Kohata

Yoshimichi Kawamoto

Yoichi Kawai

Toru Yasuda

Masami Ogura

Katsumi Sekiguchi

Osamu Tsurumiya

Yasuharu Oyama

Ikuo Nonaga

Masataka Izawa

Tsuyoshi Sato

Mitsuya Serizawa

Masami Maki

Minoru Hoshino

Yoshimi Furukawa

Shoichi Sano

Sachio Yokote

Kazuhiro Seki

Akio Yoshihara

Shigeru Hayashi

Junko Kurosawa

Takashi Miyazaki

Toshio Yahagi

Yoshihiro Iwagawa

Hiroyoshi Nozaki

Kenji Tanaka

Hirofumi Hara

Atsushi Makino

Motomi Nogiwa

Hiroo Ebisawa

Makoto Murata

Norio Ukai

Kazuto Chisaka

Nobuyuki Tanaka

Masahiko Kikuchi

Hajime Kubota

Akira Miwa

Koutarou Suzuki

Toshimasa Takakusaki

Hiroshi Furuhashi

Sachio Akai

Katuo Wada

Medicated syringe preparation

A four wheel steering system for a motor vehicle with steerable front and rear road wheels, a steering angle sensor for detecting a front wheel steering angle through which the front road wheels are steered, a vehicle speed sensor for detecting a vehicle speed of the motor vehicle, a rear wheel steering mechanism for steering the rear wheels, and a controller for controlling the rear wheel steering mechanism to steer the rear road wheels based on the detected front wheel steering angle and the detected vehicle speed when the front road wheels are steering. The controller controls the rear wheel steering mechanism to steer the rear road wheels in a direction which is opposite to the front road wheels if the detected vehicle speed is relatively low, and also controls the rear wheel steering mechanism to steer the rear road wheels in a direction which is the same as the front road wheels if the detected vehicle speed is relatively high. Furthermore, the controller controls the rear wheel steering mechanism to increase a rear wheel steering angle which through the rear road wheels are steered as the front wheel steering angle increases if a change in the front wheel steering angle is relatively small, and controls the rear wheel steering mechanism to reduce an increase in the rear wheel steering angle if a change in the front wheel steering angle is relatively large.

Four wheel steering system

A stator of a steering angle sensor is fixed to a steering column through a combination switch case and a stationary bracket, and a rotor of the sensor is rotatably fitted over a steering shaft. A locking collar is slidably but nonrotatably connected to the rotor. The locking collar and the stator are respectively provided with a locking groove and a locking tooth which engage each other to lock the rotor in a predetermined rotational alignment. When the steering angle sensor is not mounted to a vehicle, the locking groove and the locking tooth are brought into engagement with each other by a locking spring to lock the rotor. When a steering wheel is mounted to the steering shaft in a predetermined rotational neutral position of the steering shaft, a clamping pressure caused by the mounting causes the locking collar to be moved to a lockreleasing position or disengage position and the rotor is connected to the steering shaft. In this manner, the rotational neutral position of the rotor in the steering angle sensor can be easily and accurately aligned with the rotational neutral position of the steering shaft so that a signal corresponding to a rotational angle of the steering shaft from the rotational neutral position, i.e., corresponding to a steering angle, can be detected by a pickup of the stator.

Steering angle sensor for automobile

An electric power steering system which additionally includes a radial arm extending from a steering rod, an axial shaft extending in parallel with the axial center line of the steering rod, an axial bore formed in the casing of the system for guiding axial movement of the axial shaft substantially without any play, and a spring member urging the axial shaft against a side wall of the axial bore. Thus, rotation of the steering rod around its axial center line may be prevented with a relatively small force. Therefore, no excessive force needs to be applied to the axial shaft, and the axial shaft would not encounter any substantial resistance to its axial movement. The axial shaft may be provided with a groove extending along one side thereof in parallel with the axial central line of the axial shaft and provided with a bottom surface which slopes along its lengthwise direction, and the casing may support a steering rod displacement sensor having a spring-loaded retractable plunger serving as a measuring end and abutting the sloping bottom surface of the groove. Thus, the steering rod displacement sensor may be provided with a simple structure which makes it suitable to be mounted in a very limited space in the power steering system. If desired, the steering rod displacement sensor may also serve as the spring member for removing play between the axial shaft and its axial bore. This electric power steering system is suitable for use in front and rear wheel steering vehicles.

Electric power steering system

A front and rear wheel steering system for a motor vehicle with steerable front and rear road wheels includes a front wheel steering mechanism for steering the front road wheels in response to a steering action effected by a steering wheel of the motor vehicle, a neutral positioning mechanism for normally urging the rear road wheels under a resilient force to a steering neutral position, a rear wheel steering mechanism having an electric motor for steering the rear road wheels out of the steering neutral position, and a controller for controlling an electric current supplied to the electric motor depending on the steering action of the steering wheel. The controller reduces the electric current supplied to the electric motor and subsequently holds the reduced electric current while the motor vehicle is at rest and no steering action is effected by the steering wheel. Preferably, the controller controls the electric current supplied to the electric motor to reach a value which enables the electric motor to produce an output force smaller than the resilient force produced by the neutral positioning mechanism.

Front and rear wheel steering system for motor vehicles

A front and rear wheel steering system for a vehicle which transmits a steering input from a front wheel steering gear box to a rear wheel steering gear box via a coupling shaft as a rotation thereof around its longitudinal line and varies a steering gear ratio of rear wheels to front wheels according to the speed of the vehicle. A steering rod for steering the rear wheels with its longitudinal movement is provided with a crank portion which is engaged with a swing shaft pivotally attached to the coupling shaft via a pivot shaft perpendicular thereto so as to perform a gyrating motion around an extension line of the coupling shaft and thereby move the steering rod along its longitudinal direction to achieve a steering action of the rear wheels. The steering rod can be rotated around its longitudinal line according to the vehicle speed so as to displace the crank portion relative to the extension line of the coupling shaft and change the relationship between the rotational angle of the coupling shaft or the steering input to the front wheel steering gear box and the longitudinal movement of the steering rod or the steering angle of the rear wheels.

Front and rear wheel steering system for a vehicle

A four-wheel steering system for a motor vehicle steers motor vehicle rear wheels based on a steering angle ratio between front and rear wheels based on a vehicle speed, and a front wheel steering angle. The steering angle ratio is of a negative value or a relatively small positive value when the vehicle speed is in a medium speed range or a high speed range and the front wheel steering angle is in a relatively small range. The motor vehicle is controlled to turn well when the front wheel steering angle is in the relative small range while the motor vehicle is running in the medium and high speed ranges.

Four-wheel steering system for motor vehicle

A steering angle detecting device employs an analog sensor and a digital sensor to detect a displacement of a component which is displaceable depending on a change in a steering angle in a steering apparatus. The steering angle detecting device includes an analog sensor for detecting a displacement of the component and producing an analog signal having a potential corresponding to the position of the component, a digital sensor for detecting the displacement of the component and producing a predetermined number of pulses corresponding to a unit change in the steering angle, a basic count determining unit for determining a basic count corresponding to the steering angle based on the analog signal produced by the analog sensor when a steering angle starts to be detected, a counter for generating and holding a count corresponding to the steering angle by adding or subtracting the number of pulses produced by the digital sensor to or from the basic count, a steering angle calculating unit for calculating a steering angle based on the count, and a correcting unit for correcting the count when the component is positioned in a position corresponding to a predetermined reference steering angle.

Steering angle detecting device

A four-wheel-steering system includes a rear wheel steering mechanism for turning rear wheels in response to energization of an actuator. A locking device is responsive to de-energization of the actuator for locking gears and a rack shaft to prevent the rear wheels from being turned. The locking device includes a longer arm on which first and second gears are rotatably mounted, a shorter arm pivotally coupled to the longer arm, a stopper coupled to the shorter arm and engageable with the second gear, and a spring acting on the stopper for normally urging the stopper into engagement with the second gear, the actuator comprising an electric motor angularly movable with respect to the second gear.

Rear wheel steering mechanism with locking control for

A camber control system varies the camber of a wheel of a motor vehicle. The camber control system includes a detector for detecting a direction in which front wheels are steered, a controller for producing a control signal in response to a signal produced by the detector, an actuator operable in response to the control signal from the controller, and a rear wheel camber varying mechanism actuatable by the actuator for varying the camber of rear wheels. The controller is arranged such that the control signal produced thereby enables the actuator to operate the rear wheel camber varying mechanism so that the camber of outer and inner rear wheels with respect to a motor vehicle turning direction corresponding to the direction in which the front wheels are steered, is rendered negative and positive, respectively. The rear wheel camber varying mechanism has a wheel supporting member for supporting a rear wheel rotatably thereon, and lower and upper coupling members interconnecting the wheel supporting member and a body of the motor vehicle. The upper coupling member is movable transversely of the motor vehicle body, and the actuator is coupled to a portion of the upper coupling member which is mounted on the motor vehicle body.

Camber control system for motor vehicle

A rear wheel steering device in a four-wheel-steerable vehicle includes a rod member having opposite ends coupled to tie rods for turning rear wheels, an electric motor, and a screw mechanism for converting rotation of the electric motor to axial motion of the rod member. The stator and rotor of the electric motor are disposed coaxially with the rod member, the motor and the screw mechanism being juxtaposed with respect to each other in the axial direction of the rod member. The screw mechanism comprises a threaded portion on the rod member and a nut engaging the threaded portion, the nut being axially pre-loaded.

Rear wheel steering device for vehicle with four steerable wheels

A steering system for a motor vehicle having front road wheels and rear road wheels which are steerable includes a rear wheel steering mechanism for steering the rear road wheels based on a vehicle speed and a front wheel steered angle. The rear wheel steering mechanism, has a correcting mechanism fo varying a rear wheel steering force dependent on the vehicle speed.

Steering system for motor vehicle with steerable front and rear wheels

The present invention relates to a polypropylene resin composition having high dielectric strength comprising:

Polypropylene resin composition having high dielectric strength

In a four-wheel steering system for steering front and rear wheels of a vehicle in opposite directions in a low vehicle speed range, a rear wheel steering method steers the rear wheels more greatly in a predetermined low vehicle speed range in which a vehicle is usually steered by large angles than in a very low vehicle speed range lower than the predetermined range. The method insures a small turn of the vehicle while suppressing a change in the radius of a turn relative to the operation of a steering wheel immediately after the start of the vehicle.

Rear wheel steering method for a four wheel steering vehicle

Growing community of inventors

Tochigi, Japan

Masaru Abe