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:
Jan. 05, 2010
Filed:
Mar. 20, 2007
Richard B. Jess, Haslett, MI (US);
Jeffrey A. Sell, West Bloomfield, MI (US);
John E. Marano, Milford, MI (US);
Julian R. Verdejo, Farmington, MI (US);
Richard B. Jess, Haslett, MI (US);
Jeffrey A. Sell, West Bloomfield, MI (US);
John E. Marano, Milford, MI (US);
Julian R. Verdejo, Farmington, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A control system and method for adaptively controlling transmission ratio shifting in an electronically controlled transmission. A refueling event is detected. After the detected refueling event, fuel consumption is monitored for a predetermined period during which a change in composition of fuel to the engine reaches or approaches a steady state. During the period, the rate of adapting transmission shift controls is modified to respond quicker to the change in shift characteristics induced by differences in torque produced by the engine. Implementing this method can improve transmission shift quality while the quality of fuel reaching an engine is in transition.