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:
Sep. 06, 2005
Filed:
Nov. 04, 2003
James H. Devore, Laurinburg, NC (US);
Charles E. Allen, Jr., Rochester Hills, MI (US);
Winfried Sturmer, Euerbach, DE;
Karl-fritz Heinzelmann, Meckenbeuren, DE;
Ludger Ronge, Eriskirch, DE;
Loren C. Dreier, Vass, NC (US);
Robert A. Sayman, Laurinburg, NC (US);
Ronald P. Muetzel, Friedrichshafen, DE;
Muneer Abusamra, Southern Pines, NC (US);
James H. DeVore, Laurinburg, NC (US);
Charles E. Allen, Jr., Rochester Hills, MI (US);
Winfried Sturmer, Euerbach, DE;
Karl-Fritz Heinzelmann, Meckenbeuren, DE;
Ludger Ronge, Eriskirch, DE;
Loren C. Dreier, Vass, NC (US);
Robert A. Sayman, Laurinburg, NC (US);
Ronald P. Muetzel, Friedrichshafen, DE;
Muneer AbuSamra, Southern Pines, NC (US);
ZF Meritor LLC, Maxton, NC (US);
Abstract
A vehicle transmission system includes a transmission component that has an engaged condition where torque can be transferred from a vehicle engine to a drive component, and a non-engaged condition where torque is prohibited from being transferred to the drive component. A controller generates control signals to control whether the transmission component is in the engaged or non-engaged condition. The controller also identifies when a vehicle start maneuver is a coast start based on vehicle conditions existing just prior to or during the vehicle start maneuver. When a coast start is identified, the controller generates a control signal to either disengage the transmission component or to maintain the transmission component in the non-engaged condition until engine speed generally matches transmission component speed. The controller can directly control engagement by automatically actuating a movable transmission member or can indirectly control engagement by controlling engine speed. Once engine speed and transmission component speed are generally within a common speed range during coasting, the transmission component is engaged.