VALVE TIMING WITH VARIABLE OVERLAP CONTROL

A twin cam engine with separate camshafts for inlet and exhaust valve operation provides the possibility of altering the relative angular position of the two camshafts on the running engine (variable overlap) and thereby achieving better engine torque characteristics, improved part load fuel consumption and also reduced emissions. This paper presents the test results of changing the valve timing and valve overlap and describes the concept of a prototype twin cam engine with programmed computer controlled variable overlap.

  • Supplemental Notes:
    • Twentieth FISITA Congress, (SAE P-143), The Automotive Future, Volume 2, Austria, 6-11 May 1984.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Stojek, D
    • Stwiorok, A
  • Publication Date: 1984-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00392477
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 845026, HS-037 433
  • Files: HSL, USDOT
  • Created Date: Feb 28 1985 12:00AM