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:
Nov. 25, 2003
Filed:
Apr. 02, 2002
International Engine Intellectual Property Company, LLC, Warrenville, IL (US);
Abstract
A control ( ) embodies an operating strategy ( ) to facilitate engine cranking and starting via control of timing of cylinder intake ( ) and exhaust ( ) valve opening using a variable valve actuation mechanism ( ). Prior to fueling any cylinder ( ), the engine ( ) is cranked while the variable valve actuation mechanism causes pistons ( ) to operate at an initial effective compression ratio for initial cranking that is less than an effective compression ratio for running when the engine is eventually fueled and runs under its own power. Thereafter, and still before fueling, they are caused to operate at an increased effective compression ratio, and still thereafter, a portion of their charges are drawn from the exhaust system ( ). As the engine warms up, valve timing is adjusted.