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Energies 2019, 12(8), 1420; https://doi.org/10.3390/en12081420

Innovative Control Strategies for the Diagnosis of Injector Performance in an Internal Combustion Engine via Turbocharger Speed

1
Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, via di Santa Marta 3, 50139 Firenze, Italy
2
Yanmar R&D Europe, Viale Galileo 3/A, 50125 Firenze, Italy
3
Yanmar Co. Ltd., 1-32, Chayamachi, Kita-ku, Osaka-sh, Osaka 8308311, Japan
*
Author to whom correspondence should be addressed.
Received: 21 March 2019 / Revised: 4 April 2019 / Accepted: 9 April 2019 / Published: 12 April 2019
(This article belongs to the Special Issue Internal Combustion Engines 2018)
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Abstract

In order to ensure a high level of performance and to comply with the increasingly severe limitations in terms of fuel consumption and pollution emissions, modern diesel engines need continuous monitoring of their operating conditions by their control units. With particular focus on turbocharged engines, which are presently the standard in a large number of applications, the use of the average and the instantaneous turbocharger speeds is thought to represent a valuable feedback of the engine behavior, especially for the identification of the cylinder-to-cylinder injection variations. The correct operation of the injectors and control of the injected fuel quantity allow the controller to ensure the right combustion process and maintain engine performance. In the present study, two different techniques are presented to fit this scope. The techniques are discussed and experimentally validated, leading to the definition of an integrated control strategy, which features the main benefits of the two, and is able to correctly detect the cylinder-to-cylinder injection variation and, consequently, properly correct the injection in each cylinder in order to balance the engine behavior. In addition, the possibility of detecting misfiring events was assessed. View Full-Text
Keywords: injector; control; misfiring; turbocharger speed; internal combustion engine injector; control; misfiring; turbocharger speed; internal combustion engine
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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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Becciani, M.; Romani, L.; Vichi, G.; Bianchini, A.; Asai, G.; Minamino, R.; Bellissima, A.; Ferrara, G. Innovative Control Strategies for the Diagnosis of Injector Performance in an Internal Combustion Engine via Turbocharger Speed. Energies 2019, 12, 1420.

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