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. 25, 2013
Filed:
Mar. 22, 2010
Mitsuo Hitomi, Hiroshima, JP;
Masahisa Yamakawa, Hiroshima, JP;
Takashi Youso, Hiroshima, JP;
Toshiaki Nishimoto, Hiroshima, JP;
Keiji Araki, Hiroshima, JP;
Mitsuo Hitomi, Hiroshima, JP;
Masahisa Yamakawa, Hiroshima, JP;
Takashi Youso, Hiroshima, JP;
Toshiaki Nishimoto, Hiroshima, JP;
Keiji Araki, Hiroshima, JP;
Mazda Motor Corporation, , JP;
Abstract
Disclosed is a supercharged direct-injection engine, which comprises a supercharging device () for compressing intake air, and an injectorfor directly injecting fuel into a combustion chamber. In the engine, an excess air factor λ as a ratio of an actual air-fuel ratio to a stoichiometric air-fuel ratio, at least in an engine warmed-up mode, is set to 2 or more in the entire engine-load region. Further, compressed self-ignited combustion is performed in a low engine-load region, and a supercharging amount by the supercharging device () is increased along with an increase in engine load in a high engine-load region to allow the excess air factor λ to be kept at 2 or more. The engine of the present invention can effectively reduce NOx emission, while improving fuel economy.