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:
Mar. 01, 2005
Filed:
Nov. 08, 2002
Christopher Paul Glugla, Macomb, MI (US);
David Karl Trumpy, Farmington Hills, MI (US);
IN Kwang Yoo, Ann Arbor, MI (US);
William Robert Dutcher, Wayne, MI (US);
Woong-chul Yang, Ann Arbor, MI (US);
Christopher Paul Glugla, Macomb, MI (US);
David Karl Trumpy, Farmington Hills, MI (US);
In Kwang Yoo, Ann Arbor, MI (US);
William Robert Dutcher, Wayne, MI (US);
Woong-chul Yang, Ann Arbor, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A system and method for detecting an operating mode of an engine or engine component modulate a first engine parameter and analyze a change in a second engine parameter in response to modulating the first engine parameter to detect a current operating mode based on changes in at least one of the first and second engine parameters. In a variable compression ratio (VCR) engine embodiment, the system and method modify ignition timing of at least one cylinder until engine knock is detected and determine whether the cylinder is operating in the lower compression ratio mode or the higher compression ratio mode by comparing the ignition timing change required to cause engine knock to a corresponding threshold.