A scavenge performance monitoring system and a method for monitoring a process parameter in the scavenging process
A technology for monitoring system and process parameters, which is applied in the direction of electric control, exhaust treatment, electrical control, etc. of exhaust treatment devices, and can solve the problems of shortening the operating life of combustion chamber components, failing to increase the average exhaust temperature, and catastrophic failures, etc. problem, to achieve the effect of optimizing combustion duration, good trapped air fuel ratio, and low component temperature
Inactive Publication Date: 2014-07-16
WAERTSILAE SCHWEIZ AG
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Problems solved by technology
Operating the engine closer to a thermal overload condition will reduce the operating life of the combustion chamber components and in some cases may cause catastrophic failure
Significantly, some abnormal cylinder conditions cannot be predicted by the average exhaust gas temperature which may only slightly increase
Method used
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Embodiment Construction
[0043] figure 1 A schematic diagram showing the cooperation of different components for explaining the construction according to the principle of a large diesel engine with an exhaust-gas turbocharger system formed as a two-stroke large with longitudinal scavenging and with a scavenging performance monitoring system according to the invention diesel engine. Hereinafter, the scavenging performance monitoring system is designated with reference numeral 1 .
[0044] A large diesel engine 2 is known in principle from the prior art and comprises a plurality of cylinders 4 in a manner known per se, with outlet valves 8 arranged in the cylinder heads 9 of the cylinders 4 and arranged so that 4, the piston 3 moves back and forth along the running surface 5 between the bottom dead center UT and the top dead center OT. The cylinder walls and cylinder head 9 of the cylinder 4 as well as the piston 3 delimit a combustion space 41 of the cylinder 4 in a known manner. A plurality of scav...
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The invention relates to a scavenging performance monitoring system and method for monitoring process parameters during the scavenging process. A large diesel engine includes a piston arranged to move back and forth between bottom dead center (UT) and top dead center (OT) along a running surface in a cylinder wherein fuel is supplied by nozzles into the cylinder of the large diesel engine. A scavenging groove is provided in the inlet region of the cylinder for supplying a predetermined amount of scavenging air, and an outlet valve is provided in the cylinder head of the cylinder for exhausting gas. In the operating state, fresh air is sucked in by the exhaust-gas turbocharger and supplied as scavenging air via the scavenging slots to the cylinders at a predetermined charge pressure, so that an ignition gas mixture is created in the cylinders from the scavenging air and fuel. According to the invention, at least a first oxygen sensor and a second oxygen sensor are provided on the running surface of the cylinder to evaluate the scavenging performance in the cylinder of the large diesel engine.
Description
technical field [0001] The invention relates to a scavenging performance monitoring system for monitoring the process parameters in the scavenging process of a longitudinally scavenged two-stroke large diesel engine and a method for monitoring the process parameters in the scavenging process. [0002] Specifically, a scavenging performance monitoring system for optimizing the process parameters during the scavenging process of a longitudinally scavenged two-stroke large diesel engine having a cylinder arranged to be at the bottom dead center along the running surface a piston moving back and forth between top dead center, wherein fuel is supplied by nozzles into said cylinder of said large diesel engine, and having a scavenging groove in the inlet area of said cylinder for supplying a predetermined amount of scavenging air air, and an outlet valve is provided at the cylinder head of the cylinder for exhaust gas, wherein, in the operating state, fresh air is sucked in by the ...
Claims
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IPC IPC(8): F02B25/02
CPCY02T10/40F02B77/085F02D41/1441F02D41/22F02B25/04F02D41/1454F02D2400/04Y02T10/144F02D2041/1437F02D41/1439F02B77/08F02B37/00F02D35/02Y02T10/12F02D41/02F01N9/00F02D41/04
Inventor S·K·南达
Owner WAERTSILAE SCHWEIZ AG