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. 05, 2013
Filed:
Feb. 29, 2008
Mark Buchanan, Rochester Hills, MI (US);
Melissa Koenig, Howell, MI (US);
Christophe Laurent, Lake Orion, MI (US);
Mark Buchanan, Rochester Hills, MI (US);
Melissa Koenig, Howell, MI (US);
Christophe Laurent, Lake Orion, MI (US);
BorgWarner Inc., Auburn Hills, MI (US);
Abstract
A control system is provided for a multiple clutch transmission () having at least three synchronizers () with opposed acting alpha and beta pressure chambers () to selectively synchronize alpha or beta gears with a rotating shaft. The control system includes a pressure source (), a sump (), a first multiplex valve () having a first position allowing fluid communication of alpha and beta chambers for two synchronizers () with the pressure source () and diverting alpha and beta pressure chambers () of remaining synchronizers () to sump (). The first multiplex valve () has a second position reversing the above action. A second multiplex valve () connected with the first multiplex valve () having a first position connecting alpha and beta chambers () of a given synchronizer with the pressure source () and alpha and beta chambers () of the other synchronizer with the sump (). The second multiplex valve () has a second position reversing the action. A first regulator valve () is connected with the second multiplex valve () for selectively connecting the alpha chamber () with one of a set of the pressure source () and the sump (). A second regulator valve is provided connected with the second multiplex valve () for selectively connecting the beta chamber () with one of a set of the pressure source () and the (sump).