OPERATION OF VEHICLE ENGINES IN COLD CONDITIONS. START-UP, LUBRICATION AND FUEL CONSUMPTION

AJONEUVOMOOTTORIEN KYLMAKAYTTO. KAYNNISTYMINEN, VOITELU JA POLTTOAINEENKULUTUS

The fuel consumption and wear of engines increase in cold conditions. The type of lubricant (mineral, semisynthetic or synthetic oil) affects start-up and start of lubrication. The fuel consumption depends mainly on temperature, type of engine, driving manner, and viscosity of lubricant. Tests were carried out with three gasoline engines and two diesel engines in a special cold research room. The engines were run both under constant load and cyclic load. The effect of electric preheaters (block and oil heaters) was also studied. Compared to the mineral oil the synthetic oil gave easier startability, although the rotating speed in start-up was the same with both oils. The fuel consumption in a 30-minute test increased by 4-9% in diesel engines and by 5-22% in gasoline engines, when the test temperature was lowered from +20 degree of celsius to -25. The type of the oil did not affect significantly the fuel consumption. The use of block heater gives easier start-up, faster start of lubrication and a reduction of 3-5% in fuel consumption. The heater in the oil sump reduces the risk of failure in start-up, gives faster start of lubrication and a reduction of 2-3% in fuel consumption. (TRRL)

  • Availability:
  • Corporate Authors:

    Technical Research Centre of Finland

    Vuorimiehentie 5
    SF-02150 Espoo 15,   Finland 
  • Authors:
    • NYLUND, N-O
  • Publication Date: 1988

Language

  • Finnish

Media Info

  • Features: References;
  • Pagination: 49 p.
  • Serial:
    • VTT-TIED
    • Issue Number: 907
    • Publisher: VTT Technical Research Centre of Finland

Subject/Index Terms

Filing Info

  • Accession Number: 00492375
  • Record Type: Publication
  • Source Agency: VTT Technical Research Centre of Finland
  • ISBN: 951-38-3275-9
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1990 12:00AM