Effect of butanol blend on in-cylinder combustion process. Part 2: Compression ignition engine

• Autorzy: Tornatore C. , Marchitto L. , Mazzei A. , Valentino G. , Corcione F. E. , Merola S. S.
• Języki publikacji: EN

Abstrakty

EN

To meet the future stringent emission standards, innovative diesel engine technology, exhaust gas after-treatment, and clean alternative fuels are required. Oxygenated fuels showed tendency to decrease internal combustion engine emissions. In the same time, advanced fuel injection modes can promote further reduction in pollutants at the exhaust without penalty for the combustion efficiency. One of the more interesting solutions is provided by the premixed low temperature combustion (LTC) mechanism jointly to lower-cetane, higher-volatility fuels. In this paper, to understand the role played by these factors on soot formation, cycle resolved visualization, UV-visible optical imaging were applied in an optically accessed high swirl multi-jets compression ignition engine. Combustion tests were carried out using two fuels: commercial diesel and a blend of diesel with n-butanol. The fuels were tested at 70MPa injection pressure and different timings. At late injection timing coupled to high EGR rate (50%), the blends increased the ignition delay allowing operating in partially premixed LTC (PPLTC) regime in which the fuel is completely injected before the start of combustion. Strong reduction in engine out emissions of smoke and NOx were obtained with a little penalty on engine efficiency. This limitation was overcome operating at earlier injection timing in which a mixing controlled combustion (MCC) LTC regime was realized. In this regime, a good compromise between low engine out emissions and efficiency was achieved.

Słowa kluczowe

EN

optical diagnostics; combustion process; common rail CI engine; diesel/gasoline blend; diesel/butanol blend

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2011
• Tom: Vol. 18, No. 3
• Strony: 473--483
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Tornatore C.

autor

Marchitto L.

autor

Mazzei A.

autor

Valentino G.

autor

Corcione F. E.

autor

Merola S. S.

• Istituto Motori - CNR G. Marconi Street 8 - 80125 Napoli, Italy,

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