Title: KNOCK COMBUSTION IN DUAL FUEL TURBOCHARGED COMPRESSION IGNITION ENGINES
Abstract:The paper describes some results of examination of dual fuel turbocharged compression ignition engine, which verify possibility of occurring of knock combustion. The first stage of examination was don...The paper describes some results of examination of dual fuel turbocharged compression ignition engine, which verify possibility of occurring of knock combustion. The first stage of examination was done with the use of standard fuel system. Dual fuel system was used in the second stage. Diesel provided by common rail system was used for ignition of natural gas, which was treated as a main fuel. The fluctuation of the cylinder pressure and engine head vibration was registered for characteristic points of engine run (maximum torque, maximum power, maximum engine efficiency). The spectrum of vibration of engine head was analyzed. Analysis is based on application of Fast Fourier Transform for calculation of characteristic frequency and maximum values of module of transform. Moreover the factors of knock intensity were calculated. The results of analysis confirmed previous results which shown that during combustion in CI engine fluctuation of pressure appear. The fluctuation cause vibration of engine head but frequency of the vibration is characteristic for knock combustion. Characteristic frequency doesn’t depend on gas fuel rate in total fuel, which is provided to the cylinder. The magnitude, which changes is maximum of amplitude of vibration. The results of calculation of knock combustion intensity factor, which is based on maximum of amplitude of engine head vibration shown its suitability for identification of knock combustion.Read More
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 3
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