AN ULTRASONIC FLOWMETER FOR MEASUREMENT OF GAS VELOCITY AND TEMPERATURE IN INTAKE AND EXHAUST OF AN INTERNAL COMBUSTION ENGINE

A new ultrasonic velocity thermometer is presented for the simultaneous measurement of transient exhaust gas velocity and temperature under motoring and firing conditions in an internal combustion engine. Included in the instrumentation are a crank angle (CA) selection unit, a high voltage impulse generating unit, and other accessories. The instrument is described, and its operating principle and calibration are discussed. Its performance is compared with that of the spark discharge velocity meter and the wire resistance thermometer, under dynamic conditions. Exhaust temperature and velocity measurements are plotted against CA; these experimental results are discussed, including some comparisons with theoretical results obtained using a finite difference theory of gas exchange processes in internal combustion engines.

  • Availability:
  • Supplemental Notes:
    • Presented at SAE Passenger Car Meeting, Dearborn, Michigan, 11-15 June 1979.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Lakshminarayananan, P A
    • Janakiraman, P A
    • Gajendra Babu, M K
    • Murthy, B S
  • Publication Date: 1979

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00387296
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 790689, HS-029 341U
  • Files: HSL, USDOT
  • Created Date: Jul 30 1984 12:00AM