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1 Journal of KONES

1 2016

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Possibilities of analysis of condition and repair of common-rail system injectors

Karpiuk W., Bor M., Smolec R.

Journal of KONES

2016

Vol. 23, No. 4

209--216

A wide use of common-rail injection systems in vehicles made it necessary to develop effective methods of diagnosing and repair of their subassemblies. The paper presents problems connected with diagnosing of malfunctions and regeneration of common-rail system injectors with the use of testing tables. Due to precise workmanship and strong forces, the systems are particularly exposed to damage most often caused by the application of fuels of inadequate quality. Early detection of damage symptoms may contribute to considerable decrease of costs of repair without entailing any failures of other components of the system. The authors discuss the most common methods of evaluation of the condition allowing a quick and explicit identification, whether a given injector has been damaged or not. Further deliberations lead to the determination of possible regeneration of individual generation systems of various manufacturers. The authors also present basic activities of the regeneration process and tests made with the use of testing tables. The work presents results of tests performed on a new injector with the use of testing equipment of various manufacturers. Discussion on obtained results leads to conclusions that, due to little recurrence and insufficient accuracy of measurements, possibilities of clear evaluation of technical condition of injectors is greatly limited.