FUMIGATION WITH PROPANE AND TRANSESTERIFICATION EFFECTS ON INJECTOR COKING WITH VEGETABLE OIL FUELS.

This paper reports on the use of the short term test cycle, hereafter called the 'torque test', to evaluate the potential of propane fumigation and methyl esters as diesel fuel substitutes. Two different studies will be reported. The first study utilizes diesel fuel, winter rape oil with 0, 10 and 15% propane fumigation and a blend of 50% winter rape and 50% diesel. The second study involves a comparison of diesel fuel, ester of oleic safflower oil (OSE), ester of linoleic safflower oil (LSE) and ester of winter rape oil (RE). Fumigation, as used in this study, involves the injection of a mixture of liquid fuels through the conventional fuel injection system, and the induction of a gaseous fuel with the intake air. The majority of fuel energy is in a liquid form, with a small percent of the input energy coming from the inducted gas.