SI-Engine Cylinder Pressure Estimation using Torque Sensors
Paper i proceeding, 2004

In order to maximise engine efficiency it is of interest to find the peak pressure position (PPP) of the cylinder pressure when controlling combustion engines. Cylinder mounted pressure sensors can be used to measure the pressure, but these are expensive and suffer from limited durability. Alternative pressure estimation methods using cheaper and more durable sensors are needed. This paper shows the performance when estimating the cylinder pressure of a five cylinder SI-engine using a crankshaft integrated torque sensor. An engine model is constructed to be able to eliminate the torsional resonances in the sensed torque signal and the cylinder pressure is reconstructed using a parameterised pressure model. The performance of the estimator is studied in three different simulation cases. Finally, the performance based on measured torque is presented. Copyright © 2004 SAE International.

Combustion engines


Torque meters

Engine cylinders



Stefan Larsson

Chalmers, Signaler och system, Reglerteknik och automation

Stefan Schagerberg

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik

SAE Technical Paper Series 2004-01-1369, Detroit, MI, USA

Vol. 2004 01 1369
0768013194 (ISBN)

SAE 2004 World Congress & Exhibition
Detroit , USA,



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