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. 15, 2008
Filed:
Jun. 30, 2006
Mark A. Rushing, Martinsville, IN (US);
Jeffrey E Shultz, Zionsville, IN (US);
Bradley L. MC Cafferty, Zionsville, IN (US);
Randall S. Conn, Indianapolis, IN (US);
Mark A. Rushing, Martinsville, IN (US);
Jeffrey E Shultz, Zionsville, IN (US);
Bradley L. Mc Cafferty, Zionsville, IN (US);
Randall S. Conn, Indianapolis, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A method of controlling a driveline retarder of a powertrain including a transmission having a rotatable input shaft connected to an engine and an output shaft connected to the driveline retarder is provided. The method includes determining a set speed value and comparing the set speed value plus a customer modifiable constant value to a current rotational speed value of the output shaft. A driveline retarder cruise modulation torque request value is then calculated when the current rotational speed value of the output shaft is greater than or equal to the set speed value plus the customer modifiable constant value. The driveline retarder is controlled as a function of the driveline retarder cruise modulation torque request value. A powertrain configured to implement the aforementioned method is also disclosed.