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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.:

US 9617945 B1

PDFFull Text
Date of Patent:
Apr. 11, 2017

Filed:

Feb. 14, 2014

Control device of spark-ignition engine

Applicant:

Mazda Motor Corporation, Aki-gun, Hiroshima, JP;

Inventors:

Toshiaki Takahashi, Hiroshima, JP;

Junichi Taga, Higashihiroshima, JP;

Kouhei Iwai, Hiroshima, JP;

Assignee:

Mazda Motor Corporation, Hiroshima, JP;

Attorney:

Alleman Hall McCoy Russell & Tuttle LLP

Primary Examiner:

Kevin R Steckbauer

Int. Cl.
CPC ...
F02D 41/30 (2006.01); F02D 41/00 (2006.01); F02D 41/40 (2006.01); F02D 13/02 (2006.01); F02M 26/01 (2016.01); F02B 29/04 (2006.01); F02M 31/04 (2006.01); F02M 26/25 (2016.01); F02M 26/28 (2016.01);
U.S. Cl.
CPC ...
F02D 41/3064 (2013.01); F02D 13/0207 (2013.01); F02D 13/0265 (2013.01); F02D 41/0057 (2013.01); F02D 41/3011 (2013.01); F02D 41/402 (2013.01); F02M 26/01 (2016.02); F02B 29/0437 (2013.01); F02D 41/3023 (2013.01); F02D 41/3035 (2013.01); F02D 2041/001 (2013.01); F02D 2041/3052 (2013.01); F02M 26/25 (2016.02); F02M 26/28 (2016.02); F02M 31/04 (2013.01); Y02T 10/18 (2013.01); Y02T 10/44 (2013.01); Y02T 10/47 (2013.01);
Abstract

A control device of a spark-ignition engine is provided. The control device includes a main body of the engine, a fuel injection valve, an ignition plug, and a controller. According to an engine operating state, the controller switches between a compression-ignition mode in which compression-ignition combustion is performed, and a spark-ignition mode in which spark-ignition combustion is performed. The controller switches from the spark-ignition mode to the compression-ignition mode by performing in order, a first stage where an air-fuel ratio of mixture gas is set to a predetermined value and the spark-ignition combustion is performed, a second stage where the air-fuel ratio of the mixture gas is set leaner than the first stage and the compression-ignition combustion is performed, and a third stage where the air-fuel ratio of the mixture gas is set richer than the second stage and the compression-ignition combustion is performed.

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