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:
Jun. 28, 2011
Filed:
Nov. 10, 2008
Yoshikuni Kurashima, Mito, JP;
Toshio Hori, Hitachinaka, JP;
Hiroshi Miyamoto, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An engine control apparatus controls changeover of a combustion mode in an engine in which each cylinder has an injector that can perform fuel injection a predetermined number of times for each cylinder combustion. A control unit controls fuel injection and ignition timing from a spark plug. Upon combustion mode changeover from a first combustion mode, in which fuel injection is performed at least once for each cylinder combustion, to a second combustion mode, in which fuel injection is performed a greater number of times with a larger intake air volume than the first combustion mode, the control unit performs the steps of changing in the first combustion mode a target intake air volume required in the second combustion mode; retarding the ignition timing; changing to the second combustion mode; and further retarding the ignition timing.