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:
Feb. 14, 1995
Filed:
May. 21, 1993
Applicant:
Inventors:
Georg Kruse, Gifhorn, DE;
Norbert Ramm, Braunschweig, DE;
Assignee:
Volkswagen AG, Wolfsburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
477121 ; 477902 ;
Abstract
To improve shifting comfort in an automatic transmission, the transmission output shaft torque is kept as nearly constant as possible during the shifting operation by detecting, prior to and during the entire shift operation, the engine speed, the transmission input shaft speed and torque and the transmission output shaft torque or the torque of the drive wheels, and controlling the engagement and disengagement of transmission elements in accordance with those variables.