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Energies 2017, 10(10), 1548; https://doi.org/10.3390/en10101548

Optimal Cold-Start Control of a Gasoline Engine

Institute for Dynamic Systems and Control, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland
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Received: 12 September 2017 / Revised: 28 September 2017 / Accepted: 1 October 2017 / Published: 9 October 2017
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Abstract

This article analyzes the influence of the ignition retardation on the fuel consumption, the cumulative tailpipe hydrocarbon emissions, and the temperature inside the three-way catalytic converter in a gasoline direct injection engine operated under idling conditions. A dedicated cylinder-individual, model-based, multivariable controller was used in experiments in order to isolate the effect of the ignition retardation on the hydrocarbon emissions as much as possible. An optimal control problem for a gasoline engine at a cold-start is formulated, which is used to interpret the experimental data obtained. The corresponding goal is to minimize the fuel consumption during an initial idling phase of a fixed duration while guaranteeing that the three-way catalytic converter reaches a sufficiently high final temperature and at the same time making sure that the cumulative hydrocarbon emissions stay below a given limit. The experimental data indicates that the engine should be operated with maximum ignition retardation in order to reach any temperature inside the three-way catalytic converter as quickly as possible concurrently with minimum tailpipe emissions and with the minimum possible fuel consumption. View Full-Text
Keywords: gasoline direct injection engine; GDI; cold-start; catalyst heating phase; ignition retardation; hydrocarbon emissions; multivariable control gasoline direct injection engine; GDI; cold-start; catalyst heating phase; ignition retardation; hydrocarbon emissions; multivariable control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Hedinger, R.; Elbert, P.; Onder, C. Optimal Cold-Start Control of a Gasoline Engine. Energies 2017, 10, 1548.

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