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:
Apr. 27, 2004
Filed:
Sep. 06, 2002
Hiroyuki Yamashita, Hiroshima, JP;
Masashi Marubara, Hiroshima, JP;
Hiroyuki Yoshida, Hiroshima, JP;
Noriyuki Ohta, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
A control apparatus for a direct-injection, spark-ignition engine including a temperature-condition detector for detecting a temperature condition of the engine catalyst, and a controller for controlling a fuel-injection operation. The controller controls the fuel injector to perform divided fuel injections of at least a leading fuel injection and a trailing fuel injection during a compression stroke prior to the ignition timing based upon a detection of the temperature condition in an inactivated state of the catalyst, the trailing fuel injection being performed at such a timing that its mixture concentrates adjacent to the spark plug at the ignition timing by way of high cylinder pressure during a late-stage of the compression stroke, the leading fuel injection being performed at such a timing that its mixture distributes around a mixture layer by the trailing fuel injection at the ignition timing, and a midpoint between an initiation of the leading fuel injection and an initiation of the trailing fuel injection being positioned within a period during a latter half of a compression stroke.