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:
Sep. 19, 2006
Filed:
Feb. 24, 2005
Alan G. Falkowski, Lake Orion, MI (US);
Dahai Wang, Rochester Hills, MI (US);
Michael a Bonne, Leonard, MI (US);
Alan G. Falkowski, Lake Orion, MI (US);
Dahai Wang, Rochester Hills, MI (US);
Michael A Bonne, Leonard, MI (US);
DaimlerChrysler Corporation, Auburn Hills, MI (US);
Abstract
A method and code for controlling the operation of a deactivatable valve lifter of an internal combustion engine includes determining an oil viscosity measure based upon an engine oil pressure achieved when the engine is operating at a warm engine idle operating condition; determining a minimum oil temperature for actuator operation based on a comparison of the oil viscosity measure with a stored value representing the oil's nominal viscosity; and enabling actuator operation when an instantaneous oil temperature is not less than the minimum oil temperature.