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. 09, 2013
Filed:
May. 05, 2010
Hiroyuki Yamashita, Hiroshima, JP;
Masatoshi Seto, Hiroshima, JP;
Yusuke Kawai, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
When it is determined that an engine operating condition is in a high-engine load HCCI range (A) where an engine load is higher than a specified load Xwithin a HCCI range A where a compression self combustion is performed, an after-TDC injection Fis executed at a point Twhen an internal pressure of a combustion chamber drops below a specified pressure Y after the top dead center of an exhaust stroke during a minus valve overlap period NVO during which intake and exhaust valves are both closed. Then, a main injection Fas a main injection is executed. Accordingly, any improper detonation or deterioration of NOx emission which may be caused by the compression self-ignition combustion in the range where the engine load is relatively high can be prevented.