EXHAUST PRESSURE MODELLING FOR FEEDFORWARD ACTIVE CONTROL OF INTERNAL COMBUSTION ENGINE EXHAUST NOISE

This paper reports work on modelling the exhaust noise pressure of a small single-cylinder spark ignition (SI) engine. The model will utlimately be used for on-line prediction of exhaust noise in an active control system with a single-error microphone. The frequency properties of the engine exhaust noise generated by this SI engine are characterized by harmonic components related to engine firing conditions. The frequencies of the harmonic components depend only on the engine firing frequency while the amplitudes of the harmonic components vary with the engine load. Twenty harmonic components at the lower frequency band were included to model the exhaust pressure pulse which is a two-dimensional function of engine speed and load. The model is represented by a double Chebyshev polynomial. The instantaneous exhaust pressure at steady state for a fixed position in the exhaust pipe was predicted using this model and compared with the experimental data. The result of this comparison is regarded as satisfactory. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/09544070
• Corporate Authors:

  PROFESSIONAL ENGINEERING PUBLICATIONS LTD

  NORTHGATE AVENUE
  BURY ST EDMUNDS, SUFFOLK  United Kingdom  IP32 6BW
• Authors:
  • Hong, G
• Publication Date: 1999

Language

• English

Media Info

• Features: References;
• Pagination: p. 109-17
• Serial:
  • Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
  • Volume: 213
  • Issue Number: D2
  • Publisher: Sage Publications Limited
  • ISSN: 0954-4070
  • EISSN: 2041-2991
  • Serial URL: http://pid.sagepub.com/content/current

Subject/Index Terms

• TRT Terms: Exhaust pipes; Mathematical models; Motors; Noise; Pollutants; Vehicles
• ITRD Terms: 2442: Emission; 1384: Exhaust pipe; 6473: Mathematical model; 1334: Motor; 2492: Noise; 1255: Vehicle
• Subject Areas: Environment; Vehicles and Equipment;

Filing Info

• Accession Number: 00793651
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0954-4070
• Files: ITRD
• Created Date: Jun 15 2000 12:00AM