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:
May. 22, 1990
Filed:
Sep. 16, 1988
Hisatugu Ishikura, Katsuta, JP;
Kazuo Tahara, Hitachi, JP;
Toshimi Abukawa, Hitachiota, JP;
Katsuji Marumoto, Hitachi, JP;
Toshiyuki Koterazaka, Hitachi, JP;
Mitsuyuki Hombu, Katsuta, JP;
Tadashi Takahashi, Hitachi, JP;
Hirohisa Yamamura, Hitachiota, JP;
Toru Tatsuzaki, Hiratsuka, JP;
Tsutomu Ohmae, Hitachi, JP;
Shuichi Takamatsu, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Automotive Engineering Co., Ltd., Katsuta, JP;
Abstract
An electric power steering apparatus for a vehicle comprises a steering shaft, an electric motor operable to generate an auxiliary steering force having a magnitude corresponding to a value of electric current supplied thereto, a steering toque sensor for detecting a steering torque applied to the steering shaft, a vehicle weight sensor for detecting a vehicle weight, and a control device. The control device is constituted to increase and decrease the value of electric current to be supplied to the electric motor in accordance with not only the increase and decrease of the value detected by the steering torque sensor but also the increase and decrease of the value detected by the vehicle weight sensor.