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:
Apr. 21, 1987
Filed:
Oct. 15, 1984
Applicant:
Inventors:
Yuuji Katou, Zama, JP;
Kiyoshi Yoshida, Zama, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180175 ; 74868 ; 180178 ;
Abstract
In order to prevent hunting between a selected gear ratio (e.g. overdrive) and the next lower one when a vehicle ascends a slope or incline under 'cruise control', the degree to which which the cruise control arrangement (viz., the automatic vehicle speed control device (ASCD)) can open the throttle valve is limited to a value at which the transmission control circuit (e.g. hydraulic) will induce a downshaft. Upon a downshift being necessary to maintain vehicle speed, upshift is inhibited either for a predetermined period of time or until the load which necessitated the downshaft disappears.