METHOD AND DEVICE FOR CONTROLLING AIR-FUEL RATIO CORRECTION OF PREMIXING TYPE GAS ENGINE

PROBLEM TO BE SOLVED: To provide an air-fuel ratio correction control method for controlling the air-fuel ratio so as to stably operate a gas engine even in a case of biogas in which the properties of fuel gas are changed with time.SOLUTION: There is provided the air-fuel ratio correction control me...

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Bibliographische Detailangaben
Hauptverfasser:	KIKUOKA YASUHEI, NAGAI HIDEO, NAKAYAMA SADAO, FUJIMOTO ISAO, HASHIMOTO TORU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an air-fuel ratio correction control method for controlling the air-fuel ratio so as to stably operate a gas engine even in a case of biogas in which the properties of fuel gas are changed with time.SOLUTION: There is provided the air-fuel ratio correction control method of a pre-mixing type gas engine 100, in which mixed gas M with fuel gas F and air A being mixed therein is supplied. The air-fuel ratio correction control method includes: a step of measuring the temperature of exhaust gas E to be exhausted from a combustion chamber 2 of a gas engine 1; a step of setting the air-fuel ratio on the basis of the temperature of the exhaust gas E so that the air-fuel ratio may be increased compared with the value before exceeding the upper limit if the temperature of the exhaust gas E exceeds the upper limit of the preset adequate range, and that the air-fuel ratio may be decreased compared with the value before being below the lower limit if the temperature of the exhaust gas is below the lower limit of the adequate range; and a step of adjusting the supply of fuel gas F or air A according to the present set value of the air-fuel ratio.