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:
Jun. 20, 1989
Filed:
Apr. 30, 1987
Applicant:
Inventors:
Yuji Kashihara, Toyota, JP;
Yutaka Tage, Toyota, JP;
Yasunari Nakamura, Toyota, JP;
Hiroshi Ito, Toyota, JP;
Tokuyuki Takahashi, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180249 ; 180197 ;
Abstract
A central differential device for differentially transmitting rotational power from the engine to the front wheel propeller shaft and the rear wheel propeller shaft in a vehicle is locked up step by step to restrict its differential operation gradually when the difference between front wheel rotational speed and rear wheel rotational speed is larger than a reference value while checking at each step before further increasing the degree of locking up if the difference is still larger than the reference value which may be changed for such each step.