Title:
MICRO-PILOT INJECTION TYPE GAS ENGINE
Document Type and Number:
WIPO Patent Application WO/2009/078260
Kind Code:
A1
Abstract:
A micro-pilot injection type gas engine in which, at the start of the engine, operating conditions of the engine are taken into intermittent operation to make the control of the air-fuel ratio at the start of the engine highly accurate and in which the time period required for warm-up operation is reduced or eliminated. The gas engine has an on-off gas valve adapted so as to be able to change the area of a fuel gas path to each cylinder and the time period of opening and closing of the fuel gas path, a rotational speed detector for detecting the speed of the engine, a combustion diagnosis device for detecting combustion conditions of each cylinder of the engine from the pressure in the cylinder, and an intermittent valve operation control device operating according to the speed of the engine. At the start of the gas engine, the intermittent valve operation control device intermittently opens and closes the on-off gas valve according to a detected value of the engine speed, and, based on the detected waveform of the value of the detected combustion conditions of each cylinder obtained from the combustion diagnosis device, the intermittent valve operation control device intermittently opens and closes the on-off gas valve at an opening/closing interval which causes the air-fuel ratio to be a target value.
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Inventors:
SUZUKI HAJIME (JP)
NISHIO HIDEKI (JP)
SHIMIZU YUUICHI (JP)
NISHIO HIDEKI (JP)
SHIMIZU YUUICHI (JP)
Application Number:
PCT/JP2008/071592
Publication Date:
June 25, 2009
Filing Date:
November 20, 2008
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
SUZUKI HAJIME (JP)
NISHIO HIDEKI (JP)
SHIMIZU YUUICHI (JP)
SUZUKI HAJIME (JP)
NISHIO HIDEKI (JP)
SHIMIZU YUUICHI (JP)
International Classes:
F02B3/06; F02D41/06; F02B19/10; F02D19/02; F02D19/08; F02D45/00; F02M21/02; F02M21/04
Foreign References:
| JP2006132478A | 2006-05-25 | |||
| JP2003065093A | 2003-03-05 | |||
| JP2007247569A | 2007-09-27 | |||
| JP2005273556A | 2005-10-06 | |||
| JPS62255545A | 1987-11-07 | |||
| JPH0914057A | 1997-01-14 |
Other References:
See also references of EP 2136059A4
Attorney, Agent or Firm:
TAKAHASHI, MATSUMOTO & PARTNERS INTELLECTUAL PROPERTY CORP. et al. (Ambassador Roppongi Buildings16-13, Roppongi 3-chome, Minato-k, Tokyo 32, JP)
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