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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 10330031 B1

PDFFull Text
Date of Patent:
Jun. 25, 2019

Filed:

Jan. 15, 2015

Gas engine

Applicants:

Yanmar Co., Ltd., Kita-ku, Osaka-shi, Osaka, JP;

Japan Ship Machinery and Equipment Association, Minato-ku, Tokyo, JP;

Inventors:

Tatsuro Ohsara, Osaka, JP;

Keiji Matsumoto, Osaka, JP;

Osamu Yamagishi, Osaka, JP;

Assignees:

YANMAR CO., LTD., Osaka, JP;

JAPAN SHIP MACHINERY AND EQUIPMENT ASSOCIATION, Tokyo, JP;

Attorney:

Norton Rose Fulbright US LLP

Primary Examiner:

Erick R Solis

Int. Cl.
CPC ...
F02D 19/02 (2006.01); F02D 41/14 (2006.01); F02D 41/00 (2006.01); F02B 43/00 (2006.01); F02D 29/06 (2006.01); F02B 29/04 (2006.01); F02M 21/02 (2006.01); F02D 23/00 (2006.01); F02B 61/04 (2006.01); B63H 21/14 (2006.01); B63H 21/17 (2006.01); F02M 21/04 (2006.01); F02D 41/34 (2006.01); F02B 37/16 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0027 (2013.01); B63H 21/14 (2013.01); B63H 21/17 (2013.01); F02B 29/0437 (2013.01); F02B 43/00 (2013.01); F02B 61/04 (2013.01); F02D 19/02 (2013.01); F02D 19/024 (2013.01); F02D 23/00 (2013.01); F02D 29/06 (2013.01); F02D 41/0007 (2013.01); F02M 21/0215 (2013.01); F02M 21/0278 (2013.01); F02M 21/04 (2013.01); F02B 37/16 (2013.01); F02D 41/34 (2013.01); F02D 2041/1412 (2013.01); F02D 2250/31 (2013.01); Y02T 10/144 (2013.01); Y02T 10/146 (2013.01); Y02T 10/32 (2013.01); Y02T 70/5218 (2013.01);
Abstract

A gas engine is provided that suppresses fluctuation of the actual air-fuel ratio even when a load fluctuates. A gas engine () in which at least one opening degree (D) selected from the opening degree of an air supply valve () and the opening degree of a bypass valve () is corrected so that an adequate target air-fuel ratio (λt) is achieved, wherein a target gas pressure (Pgt) and a target gas-jetting time (Tt) of a fuel gas are calculated on the basis of fluctuations of an actual load (L), the gas pressure is corrected on the basis of the target gas pressure (Pgt), and at least one opening degree selected from the opening degree of the air supply valve and the opening degree of the bypass valve is corrected on the basis of the amounts of change in the target gas pressure (Pgt) and the target gas-jetting time.

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