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:
Oct. 30, 2007
Filed:
Mar. 21, 2005
Michael a Boone, Leonard, MI (US);
Mark J Duty, Goodrich, MI (US);
John S Mitchell, Farmington Hills, MI (US);
Gregory M Pannone, Rochester Hills, MI (US);
Michael J Prucka, Grass Lake, MI (US);
Marc H Sullivan, Southfield, MI (US);
Michael A Boone, Leonard, MI (US);
Mark J Duty, Goodrich, MI (US);
John S Mitchell, Farmington Hills, MI (US);
Gregory M Pannone, Rochester Hills, MI (US);
Michael J Prucka, Grass Lake, MI (US);
Marc H Sullivan, Southfield, MI (US);
Chrysler LLC, Auburn Hills, MI (US);
Abstract
Prior to transitioning a multiple-displacement engine from a full-displacement engine operating mode to a partial-displacement engine operating mode, a base slip rate of a torque converter coupled to the engine engine is increased by a predetermined slip rate offset. The engine is then transitioned to partial-displacement mode upon the earlier of either achieving the desired offset slip rate, or once a maximum time delay has occurred since the slip rate offset was enabled. An offset slip rate is maintained throughout partial-displacement engine operation, and through a transition back to a full-displacement mode. The slip rate offset is removed or disenabled once the engine is again operating in the full-displacement mode. The slip rate offset is either a calibratable constant or is determined as a function of one or more suitable engine or vehicle operating parameters affecting vehicle NVH levels, such as engine speed and vehicle speed.