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:
Mar. 26, 1991
Filed:
Jul. 14, 1989
Tatsuo Teratani, Toyota, JP;
Takeshi Tachibana, Toyota, JP;
Shigetaka Akabori, Toyota, JP;
Masumi Nagasaka, Toyota, JP;
Hiroaki Tabuchi, Toyota, JP;
Junji Takahashi, Kobe, JP;
Akira Miyazaki, Kobe, JP;
Masaki Hitotsuya, Kobe, JP;
Minoru Takahashi, Kobe, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Fujitsu Ten Limited, Hyogo, JP;
Abstract
An automotive constant speed cruise control system for a vehicle includes a controller for automatic speed change for automatically changing over a speed stage in a transmission in accordance with the relationship between a throttle valve opening degree and a car speed; a controller for constant speed traveling having a constant speed traveling control function for operating a car at a target car speed by controlling, based on a duty ratio, the throttle valve opening degree according to the actual car speed and a transmission limiting function for sending out a signal for prohibiting selection of the maximum speed stage in the transmission to the controller for automatic speed change for a specified time when the car speed lowers, and a transmission limiting function capable of being externally started by inputting a speed change signal representing that the transmission has been shifted down from a maximum speed to the controller for constant speed traveling.