Experimental Investigation of Rapeseed Oil Combustion in a Modern Common-Rail Diesel Engine Technical University of Liberec

Format:

Conference/Event

Author/Creator:

Vojtisek-Lom, Vojtisek-Lom, author.

Contributor:

Mazac, Martin

Pechout, Martin

Conference Name:

10th International Conference on Engines & Vehicles (2011-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

Neat, non-esterified vegetable oils, alternative, locally produced, renewable fuels for diesel engines, have considerably higher viscosity than diesel fuel, even when heated. While mechanical injection pumps with volumetric fuel metering compensate for higher viscosity of the fuel by an increased injection pressure, and possibly longer ignition delay is on some engines compensated by an earlier injection due to higher density and bulk modulus of vegetable oils, newer common-rail type systems do not have such mechanism, and inject vegetable oils and diesel fuel at comparable timing and pressures. The complexity of the newer injection systems also raises the issue of the effects of varying fuel properties. This paper reports on laboratory experiments carried on a four-cylinder, 4.5-liter Cummins ISBe4 engine with a Bosch Common Rail injection system, fitted with an auxiliary heated secondary fueling system, and operated on fuel-grade rapeseed oil heated to 50-60°C. The results show only a moderate (around 10%) decrease in maximum torque, a slight increase in NOx emissions, and load-dependent effect on PM emissions, with no overall increase in PM over ESC and WHSC engine test cycles

Notes:

Vendor supplied data

Publisher Number:

2011-24-0104

Access Restriction:

Restricted for use by site license