Title:
GAS ENGINE
Document Type and Number:
WIPO Patent Application WO/2014/083985
Kind Code:
A1
Abstract:
Provided is a gas engine in which the air-fuel ratio can be controlled according to a change in the composition of a fuel gas.
A gas engine (1) provided with an A/F valve (22) and a solenoid valve (21) and performing perturbation using the solenoid valve (21), wherein the gas engine (1) is configured in such a manner that a reference opening degree (B) is set while the opening degree of the A/F valve (22) is adjusted so that the time average opening degree of the solenoid valve (21) is 50% in a specific engine operating condition in which a reference fuel gas is used, and in such a manner that the gas engine (1) is provided with a control unit (10) which operates in actual operation so that, when a valve opening degree (A) in the specific operating condition of the engine is less than the set reference opening degree (B), the control unit (10) resets the opening degree of the A/F valve (22) to a degree less than the reference opening degree (B), and so that, when the valve opening degree (A) in the specific operating condition of the engine is greater than the set reference opening degree (B), the control unit (10) resets the opening degree of the A/F valve (22) to a degree greater than the reference opening degree (B).
Inventors:
OTSUBO HIROYUKI (JP)
Application Number:
PCT/JP2013/078992
Publication Date:
June 05, 2014
Filing Date:
October 25, 2013
Export Citation:
Assignee:
YANMAR CO LTD (JP)
International Classes:
F02D19/02; F02D41/02; F02D41/14; F02D45/00; F02M21/02
Foreign References:
| JP2012154276A | 2012-08-16 | |||
| JP2007332820A | 2007-12-27 | |||
| JP2003148187A | 2003-05-21 |
Other References:
See also references of EP 2910754A4
Attorney, Agent or Firm:
ARC PATENT ATTORNEYS' OFFICE (JP)
Patent business corporation ARC PATENT ATTORNEYS' OFFICE (JP)
Patent business corporation ARC PATENT ATTORNEYS' OFFICE (JP)
Download PDF: