COMPATIBILITY OF DIESEL ENGINES WITH OILSEED FUELS

A fast data capture system was constructed and used to monitor injection and ignition behaviour, at intervals of 1 degree crank angle (ca) in the deutz (f1l208d) single cylinder, direct injection engine. The fuels investigated included cetane, secondary reference kerosines, distillate, cottonseed oil and esters derived from sunflower and linseed oil. Injection lag, ignition delay and the ca between ignition and peak pressure were measured for the various fuels under different combinations of engine speed and load. The results are presented as lag or delay surfaces of degree ca plotted in the load versus speed plane. Statistical analysis of variance (ANOVA) was carried out to identify any departures in the data from a plane surface. The injection lag surfaces for distillate and the esters were similar to those for the reference fuels with the exception that significant lag occurred in the corner of high speed and load. Cottonseed oil behaved similarly to the other fuels only in the low load and speed corner of its injection lag surface which then dipped away markedly in both directions. Classical formula account for an injection lag as speed increases due to liquid compressibility, but a dependence on load cannot be explained. The ignition delay of distillate was similar to that of the reference fuels and occurred in ranking order of expected cetane number, ie cetane with a rating of 100 had the shortest delay. The data for the ester fuels indicated a shorter delay than that of distillate and also that the ester derived from sunflower oil was of higher ignition quality (ie a shorter delay) than that from linseed oil. At 2.5 nm load the ignition quality of cottonseed oil improved with increase of speed. The sensitivity of the direct measurement of ignition delay to change in cetane rating of the fuel is less than that previously found for engine throttling to misfire. However the former method provides more detailed diagnostic information. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0642084122
• Corporate Authors:

  Department of Resources and Energy

  G.P.O. Box 858
  Canberra, A.C.T. 2601,   Australia 
• Authors:
  • Johnston, RRM
  • Kill, G R
• Publication Date: 1985-2

Media Info

• Features: Figures; References; Tables;
• Pagination: 54 p.
• Serial:
  • Publication of: Department of Resources and Energy, Australia
  • Issue Number: 416
  • Publisher: Department of Resources and Energy
  • ISSN: 0811-9570

Subject/Index Terms

• TRT Terms: Alternate fuels; Cetane number; Diesel fuels; Ignition; Performance; Seeds
• ITRD Terms: 3860: Combustion; 8623: Data acquisition; 9010: Delay; 1314: Diesel engine; 3850: Fuel; 1327: Ignition; 3830: Injection (fuel); 5567: Load; 4961: Oil; 5412: Pressure; 5408: Speed; 6255: Test; 6140: Transducer; 2488: Vegetation
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00478687
• Record Type: Publication
• Source Agency: Transportation Research Board
• ISBN: 0-642-08412-2
• Files: ITRD, TRIS, ATRI
• Created Date: Jan 31 1989 12:00AM