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. 21, 1986
Filed:
Dec. 15, 1983
Toru Yamakawa, Hachioji, JP;
Fujio Makita, Hachioji, JP;
Mitsuo Umezawa, Tokyo, JP;
Ryuzo Sakakiyama, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A system for controlling power transmission of a four-wheel drive vehicle powered by an engine. The vehicle is provided with a transmission for transmitting a power of the engine to main wheels and a clutch for selectively transmitting the power to auxiliary wheels. In order to detect sudden braking of the vehicle, a vehicle speed sensor and a control circuit for detecting deceleration of the vehicle greater than a predetermined value are provided, the control circuit producing an output signal. A switch is provided responsive to the output signal for engaging the clutch, whereby the four-wheel driving power transmission is established.