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A linear acoustic model for multi-cylinder IC engine intake manifolds including the effects of the intake throttle

By M. F. Harrison, Rubio Unzueta P. L. and I. De Soto

Abstract

This paper presents a linear acoustic model of a multi-cylinder intake manifold that can be used as part of a hybrid time/frequency domain method to calculate the intake wave dynamics of practical naturally aspirated engines. The method allows the user to construct a model of almost any manifold of complex geometry. The model is constructed as an assemblage of sub-models: (i) A model for a straight pipe with both ends open and through-flow. (ii) A model for an expansion chamber consisting of three lengths of pipe laid end-to-end: a narrow bore pipe expanding into a wide bore pipe contracting into a narrower bore pipe once more. (iii) A model of a side-branch, which includes a model for a straight pipe with one end closed and a model for the three way junction that joins the side-branch to a length of flow pipe. (iv) A model for an expansion with two (or more) side-branches, which combines the sub-models (i, ii, iii) into a multi-way (n-way) junction model. (v) A model for an intake throttle. Good agreement with measurement has been found for each sub-model when bench-tested in isolation and encouraging agreement has been found when many sub-models are used together to model a complex intake manifold on a running engine

Publisher: Elsevier
Year: 2004
DOI identifier: 10.1016/j.jsv.2003.12.009
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/771
Provided by: Cranfield CERES
Journal:

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Citations

  1. (1969). Acoustic wave propagation in a sheared fluid contained in a duct. doi
  2. (1985). An improved branched pipe model for multi-cylinder automotive engine calculations. doi
  3. (1982). Clarendon Press, Oxford, The thermodynamics and gas dynamics of internal combustion engines – doi
  4. (2003). Journal of Sound and Vibration (in press), A hybrid boundary for the prediction of intake wave dynamics in IC engines. doi
  5. (2003). Journal of Sound and Vibration (in press), A linear acoustic model for intake wave dynamics in IC engines. doi
  6. (2003). Journal of Sound and Vibration (in press), The acoustics of racing engine intake systems. doi
  7. (2001). MSc Thesis, Cranfield University, Quantifying throttle losses.
  8. (2001). MSc Thesis, Cranfield University, The acoustics of internal combustion engine manifolds.
  9. Performance of exhaust silencer components. doi
  10. (1987). Plane wave reflection at flow intakes.M.F. doi
  11. (2000). Professional Engineering Publishing Ltd, London, Theory of engine manifold design: wave action methods for IC engines.M.F.
  12. (1980). Reflection coefficients for an unflanged pipe with flow. doi
  13. (1999). Society of Automotive Engineers, Warrendale Pa., Design and simulation of 4-stroke engines.M.F.
  14. The measurement of sound power flux in flow ducts. doi

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