Real-Time Nonlinear Individual Cylinder Air Fuel Ratio Observer on a Diesel Engine
| Authors: | Chauvin Jonathan, ENSMP, France, Metropolitan
Moulin Philippe, IFP, France, Metropolitan
Corde Gilles, IFP, France, Metropolitan
Petit Nicolas, ENSMP, France, Metropolitan
Rouchon Pierre, ENSMP, France, Metropolitan |
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| Topic: | 7.1 Automotive Control |
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| Session: | Engine Control |
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| Keywords: | Engine Control, Observers, Air Fuel Ratio, Individual Cylinder Observer |
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Abstract
We propose an estimator of the individual cylinder air fuel ratiosin a turbocharged Diesel Engine using as only sensor the singleair fuel ratio sensor placed downstream the turbine. The observerconsists of a nonlinear filter designed on a physics-basedtime-varying model for the engine dynamics. Convergence is proven,using a Lyapounov function. Performance is studied throughsimulations and test bench experiments on a 4 cylinder engine.
