Czasopismo
2003
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Vol. 10, No. 1-2
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277-288
Tytuł artykułu
Autorzy
Wybrane pełne teksty z tego czasopisma
Warianty tytułu
Języki publikacji
Abstrakty
Abstract The test results reported in this paper concern the single cylinder compression ignition direct injection engine fed with compressed natural gas (CNG). The variable parameters adopted in the research include: the engine speed of 2000-3000 rpm, the engine load from minimum to maximum, regulated by the knock combustion effect, variable gas concentration in the mixture A,0=1.8-10.5, and the initial dose quantity 8.2-25.5 mm3/cycle. The combustion parameters, calculated from the registered indicator diagrams, were analysed in the tests. The tests proved that the combustion of gas and liquid fuel in the dual fuel engine differs as far as the time and speed of the process are concerned. For small initial doses the liquid fuel burns f aster than the gas fuel. Two distinct heat release rate maximums can be observed then: of the liquid and gas fuel respectively. For bigger initial doses and higher engine speeds the liquid fuel combustion process is delayed, while it is accelerated in the case of the gas fuel. This results in mutual overlapping ofthe two processes. For small initial doses and high engine load the heat release rate dQ is lower by about 40 division sign 50% than in the conventionally fuelled engine. At part load running the dual fuel engine efficiency was lower by about 1.2-2.8%. The efficiency loss increased as the knock combustion limit was approached, and amounted then to 6-9%. The engine knock effect can be reduced by means of increasing the initial dose, but at high load it results in lower engine efficiency.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
277-288
Opis fizyczny
Bibliogr. 8 poz., rys.
Twórcy
autor
- Technical University of Bielsko-Biala, Internal Combustion and Automobiles Department tel (0-33) 816-36-55, istelmasiak@pb.bielsko.pl
Bibliografia
- [1] Stelmasiak Z.: „The Impact of Gas-Air Composition on Combustion Parameters of Dual Fuel Engines Fed CNG”. SAE Paper 2002-01-2235.
- [2] Badr O., Karim G.A., Liu B.: „An examination of the flame spread limits in a dual fuel engine“. Applied Thermal Engineering 19(1999) 1071-1080, 1999.
- [3] Clark N.N., Atkinson Chr.M., Atkinson R.J., McDaniel T.I., Park T.: “Optimized Emission Reduction Strategies for Dual Fuel Compression Ignition Engines Running on Natural Gas and Diesel”.
- [4] http://www.cemr.wvu.edu/~englab/Projects/navistar/navistar/navistar.html, 2002.
- [5] Gebert K., Beck J., Barkhimer R.L., Wong H.Ch.: “Strategies to Improve Combustion and Emission Characteristics of Dual-Fuel Pilot Ignited Natural Gas Engines”. SAE Paper 971712, 1997.
- [6] Ogawa H., Mijamoto N., Li Ch., Nokazawa S., Akao K.: “Low Emission and Knock- Free Combustion with Rich and Lean Biform Mixture in a Dual-Fuel Cl Engine with Induced LPG as the Main Fuel”. SAE Paper No. 2001-01-3502, 2001.
- [7] Saito H., Kawabata Y., Sakurai T.: “Study on the Lean Bum Gas Engine Ignited by Pilot Fuel Injection (Part 4)”. Annual Technical Report Digest Vol. 10/2000, 2000.
- [8] Stelmasiak Z.: “Analysis of Combustion Phenomena In Dual Fuel Engine Fed With Natural Gas (CNG)”. Fisita 2002 World Automotive Congress, Paper No. F02 V030, 2002.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ6-0026-0035