Self-optimising control of an SI-engine using a torque sensor
Artikel i vetenskaplig tidskrift, 2008

Control of combustion phasing using a torque sensor is developed for a spark-ignited engine to demonstrate a method to increase its efficiency. Combustion phasing is quantified based on the torque signal using the torque ratio concept for combustion modelling. The combustion phasing is adjusted using the spark advance as control signal. An extremum-seeking controller finds the optimal combustion phasing in each cylinder. The combustion phasing is extracted using an algorithm, which considers the torsional resonances in the crankshaft. The torque-based control system is successfully evaluated on-line using internal EGR changes as combustion disturbances.

Engine efficiency

Automotive control

Self-optimising control

Engine control

Spark advance control

Combustion-phasing detection


Stefan Larsson

Signaler och system, System- och reglerteknik, Reglerteknik

Ingemar Andersson

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Control Engineering Practice

Vol. 16 505-514