Estimation of Combustion Phasing Using the Combustion Net Torque Method
Paper i proceeding, 2011

A new and computationally efficient method, called the combustion net torque method, for estimating combustion phasing in an internal combustion engine using crankshaft torque data is presented. The work is motivated by the need of such an estimation method for real-time implementation of a torque based closed-loop combustion phasing control system. The ideal properties of the proposed method, based on torque calculated from cylinder pressure, are studied using simulations and experimental data from both a spark ignited and a compression ignited engine. A relation to 50% burned mass fraction, the most common measure of combustion phasing, is established and the robustness of the method is investigated. The results show that the ideal estimation accuracy of the proposed method is high, especially around the combustion phasing position where maximum engine efficiency is achieved. Also, the computational complexity of the combustion net torque method is significantly lower compared to other existing techniques for torque domain combustion phasing estimation.

Engine control

Internal combustion engines

Engine management

Författare

Mikael Thor

Chalmers, Signaler och system, System- och reglerteknik, Reglerteknik

Bo Egardt

Chalmers, Signaler och system, System- och reglerteknik, Reglerteknik

Tomas McKelvey

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Ingemar Andersson

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

IFAC Proceedings Volumes (IFAC-PapersOnline)

14746670 (ISSN)

Vol. 18 11827-11832

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Ämneskategorier

Reglerteknik

Signalbehandling

DOI

10.3182/20110828-6-IT-1002.02351

ISBN

978-390266193-7