2 A SCAVENGE PERFORMANCE MONITORING SYSTEM AND A METHOD FOR MONITORING A PROCESS PARAMETER IN THE SCAVENGING PROCESS OF A LONGITUDINALLY SCAVENGED TWO-STROKE LARGE DIESEL ENGINE

摘要

The present invention relates to a scavenging performance monitoring system (1) for optimizing process parameters in a scavenging process of a large two-stroke diesel engine (2) scavenged in the longitudinal direction. The large diesel engine 2 described above includes a piston 3 arranged to be reciprocatable along the moving surface 5 of the cylinder 4 between the bottom dead center UT and the top dead center OT, The fuel is supplied to the cylinder 4 of the large-size diesel engine 2 described above. A slot 6 is provided in the inlet region of the cylinder 4 to supply a predetermined amount of the combustion air 7 and a cylinder 6 of the cylinder 4 described above for discharging the combustion gas 10 is provided. An exhaust valve (8) is provided on the cover (9). Fresh air 11 is sucked in by the exhaust gas turbocharger 12 and fresh air 11 as described above as the fresh air 7 is supplied to the above described unitary slot 7 by a predetermined supply pressure Is supplied to the above-mentioned cylinder 4, so that a combustion gas mixture of the combustion air 7 and the fuel is generated in the cylinder 4. [ According to the present invention, at least one first oxygen sensor 130, 131 and a second oxygen sensor 130, 132 are provided on the moving surface 5 of the cylinder 4, 4) is evaluated. The present invention also relates to a method for optimizing process parameters by a scavenging performance monitoring system (1) in a scavenging process of a large two-stroke diesel engine (2) scavenged in the longitudinal direction.