Analysis of combustion processes in ci engine fuelled either with diesel fuel or rape oil methyl ester and additionally with ethanol

• Autorzy: Kowalewicz, A.
• Języki publikacji: EN

Abstrakty

EN

At the conference KONES’2005 combustion characteristics of CI engine fuelled with rape oil methyl ester (RME) and ethanol injected into inlet port have been presented. In this paper combustion processes in the engine fuelled with two base fuels: diesel oil (DF) or rapeseed oil methyl ester and additionally with ethanol have been analyzed and combustion parameters have been compared. Ethanol fraction has a serious influence on combustion. Addition of ethanol delays combustion in the initial stage but despite of that, combustion is completed earlier if the ethanol fraction is higher. This phenomenon takes place for both base fuels: RME and DF. However, for high speed (2200 rpm) and torque = 20 Nm (pe= 0,256 MPa) ignition delay of DF was so long, that ignition took place 15 CA deg ATDC. Nevertheless of that, combustion was completed only about 5 CA deg later than for neat DF. Combustion processes for both fuels are similar, but there are some differences in ignition delay. At low load and high speed for fuelling with DF combustion extends for exhaust stoke. On account on diesel – knock the engine can not be loaded by higher torque at high speed. Besides ethanol fraction, there is a strong influence of load and speed on combustion parameters. Generally increase of speed decreases maximum pressure and increase of load increases it, as well for RME as for DF. The highest pressure has been measured for DF and ethanol injection.

Słowa kluczowe

EN

rape oil methyl ester; diesel fuel; ethanol; heat release rate; fraction of fuel burnt; autoignition; ignition lag; combustion time

• Czasopismo: Journal of KONES
• Rocznik: 2006
• Tom: Vol. 13, No. 2
• Strony: 225-240
• Opis fizyczny: rys.

Twórcy

autor

Kowalewicz, A.

• Politechnika Radomska Al. Chrobrego 45, 26-600 Radom, Poland tel. [phone], fax [phone],