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. 06, 1989
Filed:
Feb. 23, 1988
Ryuzo Sakakiyama, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A power transmission system for a four-wheel drive vehicle has an automatic transmission for transmitting power of an engine to main driving wheels and a transfer clutch for transmitting the power to auxiliary driving wheels. First and second vehicle speed sensors are provided for sensing vehicle speed dependent on the main driving wheels and the auxiliary driving wheels, respectively. A two-wheel drive switch is provided for producing a two-wheel drive signal. The automatic transmission uses an output signal of the first vehicle speed sensor as data representing driving conditions of the vehicle. In response to the two-wheel drive signal, the transfer clutch is disengaged and an output signal of the second vehicle speed sensor is selected as vehicle speed.