Air-fuel-ratio control of engine system with unknown input observer

Jing Na; Guido Herrmann; Clement Rames; Richard Burke; Chris Brace

doi:10.1109/CONTROL.2016.7737647

Air-fuel-ratio control of engine system with unknown input observer

Jing Na, Guido Herrmann, Clement Rames, Richard Burke, Chris Brace

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

8 Citations (Scopus)

453 Downloads (Pure)

Abstract

This paper presents an alternative control to maintain the air-fuel-ratio (AFR) of port-injected spark ignition (SI) engines at certain value, i.e. stoichiometric value, to improve the fuel economy. We first reformulate the AFR regulation problem as a tracking control for the injected fuel mass flow rate, which can simplify the control synthesis when the fuel film dynamics are taken into account. The unknown engine parameters and dynamics can be lumped as an unknown signal, and then compensated by incorporating the unknown input observer into the control design. Only the measurable air mass flow rate through throttle, manifold pressure and temperature, and the universal exhaust gas oxygen (UEGO) sensor are utilized. Simulations based on a mean-value engine model (MVEM) illustrate that the proposed control can achieve satisfactory transient and steady-state performance with strong robustness when the engine is operated in varying speed conditions.

Original language	English
Title of host publication	2016 UKACC 11th International Conference on Control (CONTROL)
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Number of pages	6
ISBN (Electronic)	978-1-4673-9891-6
ISBN (Print)	978-1-4673-9892-3
DOIs	https://doi.org/10.1109/CONTROL.2016.7737647
Publication status	Published - 10 Nov 2016
Event	2016 UKACC 11th International Conference on Control (CONTROL) - Queen's University, Belfast, Ireland Duration: 31 Aug 2016 → 2 Sept 2016

Conference

Conference	2016 UKACC 11th International Conference on Control (CONTROL)
Country/Territory	Ireland
City	Belfast
Period	31/08/16 → 2/09/16

Keywords

Air-to-fuel ratio control
Spark ignition engine
Unknown input observer
Mean-value engine model

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10.1109/CONTROL.2016.7737647

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@inproceedings{c5bd29fb4ec544598cb68fa0f8954a23,

title = "Air-fuel-ratio control of engine system with unknown input observer",

abstract = "This paper presents an alternative control to maintain the air-fuel-ratio (AFR) of port-injected spark ignition (SI) engines at certain value, i.e. stoichiometric value, to improve the fuel economy. We first reformulate the AFR regulation problem as a tracking control for the injected fuel mass flow rate, which can simplify the control synthesis when the fuel film dynamics are taken into account. The unknown engine parameters and dynamics can be lumped as an unknown signal, and then compensated by incorporating the unknown input observer into the control design. Only the measurable air mass flow rate through throttle, manifold pressure and temperature, and the universal exhaust gas oxygen (UEGO) sensor are utilized. Simulations based on a mean-value engine model (MVEM) illustrate that the proposed control can achieve satisfactory transient and steady-state performance with strong robustness when the engine is operated in varying speed conditions.",

keywords = "Air-to-fuel ratio control, Spark ignition engine, Unknown input observer, Mean-value engine model",

author = "Jing Na and Guido Herrmann and Clement Rames and Richard Burke and Chris Brace",

year = "2016",

month = nov,

day = "10",

doi = "10.1109/CONTROL.2016.7737647",

language = "English",

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booktitle = "2016 UKACC 11th International Conference on Control (CONTROL)",

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note = "2016 UKACC 11th International Conference on Control (CONTROL) ; Conference date: 31-08-2016 Through 02-09-2016",

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Na, J, Herrmann, G, Rames, C, Burke, R & Brace, C 2016, Air-fuel-ratio control of engine system with unknown input observer. in 2016 UKACC 11th International Conference on Control (CONTROL). Institute of Electrical and Electronics Engineers (IEEE), 2016 UKACC 11th International Conference on Control (CONTROL), Belfast, Ireland, 31/08/16. https://doi.org/10.1109/CONTROL.2016.7737647

TY - GEN

T1 - Air-fuel-ratio control of engine system with unknown input observer

AU - Na, Jing

AU - Herrmann, Guido

AU - Rames, Clement

AU - Burke, Richard

AU - Brace, Chris

PY - 2016/11/10

Y1 - 2016/11/10

N2 - This paper presents an alternative control to maintain the air-fuel-ratio (AFR) of port-injected spark ignition (SI) engines at certain value, i.e. stoichiometric value, to improve the fuel economy. We first reformulate the AFR regulation problem as a tracking control for the injected fuel mass flow rate, which can simplify the control synthesis when the fuel film dynamics are taken into account. The unknown engine parameters and dynamics can be lumped as an unknown signal, and then compensated by incorporating the unknown input observer into the control design. Only the measurable air mass flow rate through throttle, manifold pressure and temperature, and the universal exhaust gas oxygen (UEGO) sensor are utilized. Simulations based on a mean-value engine model (MVEM) illustrate that the proposed control can achieve satisfactory transient and steady-state performance with strong robustness when the engine is operated in varying speed conditions.

AB - This paper presents an alternative control to maintain the air-fuel-ratio (AFR) of port-injected spark ignition (SI) engines at certain value, i.e. stoichiometric value, to improve the fuel economy. We first reformulate the AFR regulation problem as a tracking control for the injected fuel mass flow rate, which can simplify the control synthesis when the fuel film dynamics are taken into account. The unknown engine parameters and dynamics can be lumped as an unknown signal, and then compensated by incorporating the unknown input observer into the control design. Only the measurable air mass flow rate through throttle, manifold pressure and temperature, and the universal exhaust gas oxygen (UEGO) sensor are utilized. Simulations based on a mean-value engine model (MVEM) illustrate that the proposed control can achieve satisfactory transient and steady-state performance with strong robustness when the engine is operated in varying speed conditions.

KW - Air-to-fuel ratio control

KW - Spark ignition engine

KW - Unknown input observer

KW - Mean-value engine model

U2 - 10.1109/CONTROL.2016.7737647

DO - 10.1109/CONTROL.2016.7737647

M3 - Conference Contribution (Conference Proceeding)

SN - 978-1-4673-9892-3

BT - 2016 UKACC 11th International Conference on Control (CONTROL)

PB - Institute of Electrical and Electronics Engineers (IEEE)

T2 - 2016 UKACC 11th International Conference on Control (CONTROL)

Y2 - 31 August 2016 through 2 September 2016

ER -

Air-fuel-ratio control of engine system with unknown input observer

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