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

Michele Becciani, Luca Romani, Giovanni Vichi, Alessandro Bianchini, Go Asai, Ryota Minamino, Alessandro Bellissima and Giovanni Ferrara
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Michele Becciani: Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, via di Santa Marta 3, 50139 Firenze, Italy
Luca Romani: Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, via di Santa Marta 3, 50139 Firenze, Italy
Giovanni Vichi: Yanmar R&D Europe, Viale Galileo 3/A, 50125 Firenze, Italy
Alessandro Bianchini: Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, via di Santa Marta 3, 50139 Firenze, Italy
Go Asai: Yanmar Co. Ltd., 1-32, Chayamachi, Kita-ku, Osaka-sh, Osaka 8308311, Japan
Ryota Minamino: Yanmar Co. Ltd., 1-32, Chayamachi, Kita-ku, Osaka-sh, Osaka 8308311, Japan
Alessandro Bellissima: Yanmar R&D Europe, Viale Galileo 3/A, 50125 Firenze, Italy
Giovanni Ferrara: Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, via di Santa Marta 3, 50139 Firenze, Italy

Energies, 2019, vol. 12, issue 8, 1-22

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.

Keywords: injector; control; misfiring; turbocharger speed; internal combustion engine (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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