This paper describes the application of a time domain systems approach to t
he modelling of a reciprocating engine. The engine model includes the varyi
ng inertia effects resulting from the motion of the piston and con-rod. The
cylinder pressure measured under operating conditions is used to force the
model and the resulting motion compared with the measured response. The re
sults obtained indicate that the model is very good. (C) 1999 Academic Pres
s.