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:
Nov. 13, 2012
Filed:
Jan. 22, 2010
Nathaniel E. Wilke, Waterford, MI (US);
Todd R. Berger, Pinckney, MI (US);
Joel H. Gunderson, Canton, MI (US);
Nathaniel E. Wilke, Waterford, MI (US);
Todd R. Berger, Pinckney, MI (US);
Joel H. Gunderson, Canton, MI (US);
Abstract
A method of filling a clutch chamber of an automatic transmission includes determining an engage pressure to engage a clutch of the automatic transmission. The method determines a reactive pressure of a return spring of the clutch. The method also estimates a fill pressure based on the engage pressure and the reactive pressure. The method estimates a flow rate based on the engage pressure, and generates a fill pressure command signal to fill the clutch chamber based on the fill pressure, the flow rate and a flow rate limit.