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Thermodynamic Analysis of a Swirl Chamber Diesel Engine
Sector:
Language:
German
Abstract
The thermodynamic analysis of swirlchamber engines presents a
problem that has not yet been satisfactorily resolved. One of the
main reasons for this is the high level of accuracy required for
measuring the absolute pressures and pressure differences between
the cylinder and swirlchamber and the lack of adequate calculation
models for heat transfer and the mass transfer between the two
chambers.
The paper describes, firstly, how the method of pressure
measurement has been improved. Subsequently, the heat-release
analysis of Anisits and Zapf was used, however, this revealed
errors in the heat transfer and mass flow rate. A new model for
these latter quantities is therefore proposed and has been deveoped
using motored pressure measurements.
Results are presented which demonstrate how the method may be
applied to calculate the heat release rates in both chambers using
measurements from the fired engine and with variations in both load
and speed.