Dynamics of I. C. Engine induction systems

The periodic pressure fluctuations found in internal combustion engine intake pipes are analysed by determining initially the steady oscillatory part of the response. Then, by considering the analytical solution of a simpler model, the transient response is formulated enabling the complete pressure at a point in the intake pipe to be found. The air flow in the intake pipe is considered to have viscous losses but these effects are ignored in the cylinder, as are any thermodynamic influences. Experimentally derived results are presented for comparison with the analysis.