The paper describes engine development in progress at the Porsche Development Centre at Weissach. Effort is being directed at two main areas: the control of air/fuel mixture to suit varying conditions, and, the optimization of construction parameters such as cylinder size, compression ratio and number of cylinders. In the first area electronic control is making considerable contributions to combustion efficiency. In the second area tests have shown that by raising the compression ratio of a petrol engine from 9.2:1 to 13:1 an sfc comparable with equivalent size diesel engines has been achieved. Bowl-in-piston piston combustion chambers are seen as the best approach to tolerance of low octane fuels at high compression ratios. (TRRL)

  • Availability:
  • Corporate Authors:

    Mechanical Engineering Publications Limited

    P.O. Box 24, Northgate Avenue
    Bury St Edmunds, Suffolk IP32 6BW,   England 
  • Publication Date: 1980-9-11

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 106-108
  • Serial:
    • Volume: 5
    • Issue Number: 5
    • Publisher: Institution of Mechanical Engineers
    • ISSN: 0307-6490

Subject/Index Terms

Filing Info

  • Accession Number: 00330485
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1981 12:00AM