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:
Dec. 26, 1989
Filed:
Oct. 19, 1988
Kunitaka Furuya, Tochigi, JP;
Yasuji Shibahata, Tochigi, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A drive force distribution control system in a four-wheel drive motor vehicle for distributing drive forces from an engine of the motor vehicle to first and second wheels of the motor vehicle includes drive force distributing means for distributing and transmitting the drive forces to the first and second wheels, first speed detecting means for detecting a rotational speed (Nf) of the first wheel, second speed detecting means for detecting a rotational speed (Nr) of the second wheel, torque detecting means for detecting a torque (Tr) transmitted to the second wheel, and control means for controlling the drive force distributing means. The control means for calculating a slip ratio (S) of the second wheel to a road on which the motor vehicle is running based on the rotational speeds of the first and second wheels, calculating a ratio (Tr/S) between the torque (Tr) and the slip ratio (S), determining a distribution ratio between the drive forces to be distributed to the first and second wheels based on the ratio between the torque and the slip ratio, and controlling the drive force distributing means to distribute and transmit the drive forces to the first and second wheels according to the distribution ratio.