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:
Nov. 29, 2005
Filed:
Jun. 03, 2004
Mitsuo Hitomi, Fuchu-cho, JP;
Takayoshi Hayashi, Fuchu-cho, JP;
Kouji Sumida, Fuchu-cho, JP;
Masahisa Yamakawa, Fuchu-cho, JP;
Satoru Matsuzaki, Fuchu-cho, JP;
Hiroyuki Maeda, Fuchu-cho, JP;
Mitsuo Hitomi, Fuchu-cho, JP;
Takayoshi Hayashi, Fuchu-cho, JP;
Kouji Sumida, Fuchu-cho, JP;
Masahisa Yamakawa, Fuchu-cho, JP;
Satoru Matsuzaki, Fuchu-cho, JP;
Hiroyuki Maeda, Fuchu-cho, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A control device for a spark-ignition engine, in which a mixture in a combustion chamber is fired by compression ignition in a part-load range under warm-running conditions, includes an EGR controller incorporating a valve operation controller for controlling internal EGR of hot burned gas and a cold EGR controller for controlling external EGR of cold burned gas. The EGR controller performs EGR control operation to leave the hot EGR gas in the combustion chamber in a lower-load, lower-speed region within a compression ignition combustion range and to introduce the cold EGR gas into the combustion chamber in a higher-load, higher-speed region within the compression ignition combustion range. The control device further includes a firing assist unit for inducing the compression ignition at least when ignitability of the mixture decreases due to introduction of the cold EGR gas in the compression ignition combustion range.