Hans J. Goettler

Comparative analysis of plant oil based fuels

This paper presents the evaluation results from the analysis of different blends of fuels using the 13-mode standard SAE testing method. Six high oleic safflower oil blends, six ester blends, six high oleic sunflower oil blends, and six sunflower oil blends were used in this portion of the investigation. Additionally, the results from the repeated 13-mode tests for all the 25/75% mixtures with a complete diesel fuel test before and after each alternative fuel are presented.

Discharge Coefficients for Multi-Hole Fuel Injection Nozzle for Alternate Fuels

The flow of diesel fuel through multi-hole injection nozzles is well understood. There are, however, no comprehensive experimental results for the design of injection nozzles for alternate fuels. A steady state flow generator was designed and employed to analyze the effects of the physical fuel properties and the needle lift on the discharge coefficient for the nozzle orifice. The testing is described in this paper and the experimental results are discussed.

Reduced Injection Needle Mobility Caused by Lacquer Deposits from Sunflower Oil

The effect of temperature on the rate of lacquer deposit formation from neat sunflower oil on the needles of fuel injection nozzles was investigated. Bosch fuel injection nozzles were tested on a fuel injection calibration stand. A pneumatic leak test was developed to monitorr the needle clearance reduction due to deposit buildup. Based on the obtained results, the temperature of injection nozzles handling plant oil fuels should be kept as low as possible. The heating of plant oil fuels to reduce their viscosity should be restricted to the necessary minimum

On the Thermal Decomposition and Residue Formation of Plant Oils

Plant oils are considered viable replacement fuels for diesel engines. However, in order to become successful, diesel fuel substitutes, problems associated with the formation of lacquer and carbon deposits on engine components must be resolved, else truly long-term engine reliability will not be possible. This paper reports some basic experiments into the formation of residues due to liquid phase reactions of a number of plant oils as a function of temperature.