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:
Aug. 19, 2008
Filed:
Apr. 04, 2007
Toshikazu Shiino, Chigasaki, JP;
Hiroyuki Suzuki, Yokosuka, JP;
Tomohiko Tatara, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
An internal combustion engine () alters an effective compression ratio from an effective compression ratio for a start-up operation to a larger effective compression ratio for a normal operation when an engine rotation speed (NE) increases beyond a resonance rotation speed region during cranking. A controller () determines whether or not the engine () has reached a combustion possible state on the basis of the engine rotation speed (NE) during cranking and an operating parameter (PA, TA, TW, P_Rail, V_Ang) other than the engine rotation speed (NE) (S, S, S). When the determination is negative, the controller () inhibits fuel supply to the engine () by a fuel supply device (), even when the engine rotation speed has increased beyond the resonance rotation speed region (S). In so doing, a combustion defect such as a misfire is prevented.