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. 24, 1995
Filed:
May. 20, 1993
Koji Morita, Hiratsuka, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A torque split control apparatus for use with 4WD type vehicle. The drive from the engine is transmitted to the primary drive wheels of the vehicle and to the secondary drive wheels of the vehicle through a torque distributing clutch capable of varying a torque transmitted to the secondary drive wheels. A wheel speed difference between speeds of rotation of the primary and secondary drive wheels, a vehicle speed and a difference between the diameters of the tires of the primary and secondary drive wheels are sensed. A dead zone is calculated as a function of tire diameter difference and vehicle speed. The calculated dead zone increases as the sensed tire diameter difference increases and as the sensed vehicle speed increases. The calculated dead zone is subtracted from the calculated wheel speed difference to correct the wheel speed difference. The corrected wheel speed difference is used to calculate a torque. A smaller one of the calculated torque and a maximum torque is selected. The torque distributing clutch is controlled to transmit the selected torque to the secondary drive wheels.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile