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:
Jul. 24, 1990
Filed:
Nov. 30, 1988
Applicant:
Inventor:
Gunter Jurgens, Waiblingen, DE;
Assignee:
Daimler-Benz AG, , DE;
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74867 ; 74861 ;
Abstract
In an arrangement for the automatic shifting of an epicyclic speed change transmission, a relatively quickly performed smooth selection operation in starting is achieved by the speed change transmission taking the form of a group gear divided into two transmission sections. In a first selection phase, the one transmission section is stalled with uncoupling from the drive motor and the transmission section connected to the output shaft is held in the driveless state. On reaching the stalled state, the torque transmissibility between the drive motor and output shaft is restored with a smooth flat rise beginning from zero, by pressure control in the shift actuators concerned.