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. 12, 1993
Filed:
Jan. 09, 1992
Yoshiyuki Eto, Isehara, JP;
Akira Kiribe, Hatano, JP;
Hitoshi Tanaka, Shimotsuga, JP;
Takashi Yonezawa, Kawachi, JP;
Takayuki Watanabe, Sagamihara, JP;
Nissan Motor Company, Ltd., , JP;
Abstract
An active torque-split control system for actively controlling a distribution of driving torque applied to front and rear wheels in a four-wheel drive vehicle employing a transfer device including a transfer clutch for varying said driving torque distribution depending on the operating state of the vehicle, comprises sensors for monitoring the operating state, and a torque-split controller for switching from a normal torque-split control mode to a rigid torque-split control mode only when the controller determines that the vehicle is operated in a warning region closer to a critical state. The normal torque-split control mode corresponds to a first mode that the rear-wheel driving torque gets priority over the front-wheel driving torque, while the second controllable torque corresponds to a second mode that the transfer ratio of the front-wheel driving torque is quickly increased to be substantially equal to that of the rear-wheel driving torque so as to obtain a front-wheel speed substantially equal to a rear-wheel speed.