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Kalman Filtering for Real-Time Individual Cylinder Air Fuel Ratio Observer on a Diesel Engine Test Bench

Auteurs: Jonathan Chauvin, Philippe Moulin, Gilles Corde, Nicolas Petit et Pierre Rouchon Proc. of American Control Conference, Minneapolis, June 14-16, 2006, pp. 1886-1891 DOI: 10.1109/ACC.2006.1656495
We propose an estimator of the individual cylinder air fuel ratios in a turbocharged Diesel Engine using as only sensor the single air fuel ratio sensor placed downstream the turbine. The observer consists of a time-varying Kalman Filter based on a physics-based model for the engine dynamics. We prove that the reference system converges toward a limit cycle. This limit cycle is used for the design of an extended Kalman filter. Performance is evaluated through test bench experiments on a 4 cylinder Diesel engine. The proposed approach has the advantage over existing methods of providing insight into the cylinders unbalance by considering a higher frequency model of the exhaust manifold. This information could pave the road to efficient closed loop control strategy as demonstrated on an experimental example.
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BibTeX:
@Proceedings{,
author = {Jonathan Chauvin, Philippe Moulin, Gilles Corde, Nicolas Petit, Pierre Rouchon},
editor = {},
title = {Kalman Filtering for Real-Time Individual Cylinder Air Fuel Ratio Observer on a Diesel Engine Test Bench},
booktitle = {2006 American Control Conference},
volume = {},
publisher = {},
address = {Minneapolis},
pages = {1886-1891},
year = {2006},
abstract = {We propose an estimator of the individual cylinder air fuel ratios in a turbocharged Diesel Engine using as only sensor the single air fuel ratio sensor placed downstream the turbine. The observer consists of a time-varying Kalman Filter based on a physics-based model for the engine dynamics. We prove that the reference system converges toward a limit cycle. This limit cycle is used for the design of an extended Kalman filter. Performance is evaluated through test bench experiments on a 4 cylinder Diesel engine. The proposed approach has the advantage over existing methods of providing insight into the cylinders unbalance by considering a higher frequency model of the exhaust manifold. This information could pave the road to efficient closed loop control strategy as demonstrated on an experimental example.},
keywords = {}}