The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1988
Filed:
Nov. 16, 1987
Fuji Jukogyo Kabushiki Kaisha, both of, JP;
Mitsubishi Danki Kabushiki Kaisha, both of, JP;
Abstract
A rear wheel steering apparatus for a vehicle with hydraulic power steering for the front wheels is disclosed. Pressure sensors detect the hydraulic pressure in the two chambers of a power cylinder for the front wheels. A differential amplifier which is connected to the pressure sensors produces an output signal corresponding to the pressure difference between the chambers. An electric motor for steering the rear wheels is controlled by a control unit in response to the output signal from the differential amplifier and an output signal from a vehicle speed sensor. At high speeds, the rear wheels are steered in the same direction as the front wheels, and at low speeds, they are steered in the opposite direction. When the steering wheel is in a neutral position and a sudden lateral force acts on the vehicle to cause a cornering force to be exerted on the front wheels, the rear wheels are steered in the direction tending to increase the restoring moment acting on the vehicle.