Injection diagnosis through common-rail pressure measurement

• Published in: Proceedings of the Institution of Mechanical Engineers. Part D, Journal of automobile engineering Vol. 220; no. 3; pp. 347 - 357
• Main Authors: Payri, F, Luján, J M, Guardiola, C, Rizzoni, G
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.03.2006; Professional Engineering; SAGE PUBLICATIONS, INC
• Subjects: Applied sciences; Automobiles; Diesel engines; Engines and turbines; Exact sciences and technology; Failure analysis; Fracture mechanics (crack, fatigue, damage...); Fuels; Fundamental areas of phenomenology (including applications); Internal combustion engines: gazoline engine, diesel engines, etc; Mechanical engineering. Machine design; Physics; Pressure measurement; Solid mechanics; Steel design; Steel tanks and pressure vessels; boiler manufacturing; Structural and continuum mechanics; common rail; diesel engines; injection failure; misfire; failure detection; Motor fuel injection; Rupture; Pressure vessel; Diesel engine; Pump; High pressure; Common rail; Rail; Pressure drop; Failure detection; Internal combustion engine; Pressure measurement; Dynamic pressure
• ISSN: 0954-4070; 2041-2991
• DOI: 10.1243/09544070JAUTO34

Abstract Modern diesel common-rail injection systems supply fuel from a high-pressure vessel. The injection event causes an instantaneous drop in the rail pressure, as the stored mass is diminished. Pressure variations are also affected by the dynamics of the high-pressure pump that supplies fuel to the rail to compensate for the emptying process due to the injection. This paper proposes the possibility of diagnosing the injection process from measurement of the rail pressure. Different data treatment techniques are explored and evaluated in this paper to propose an effective method for the diagnosis of common-rail injection systems.