Evaluation of DLC coatings for spark-ignited, direct-injected fuel systems

The suitability of diamond-like carbon (DLC) coatings for reduction of friction and wear in spark-ignited, direct-injected fuel systems has been investigated. Three commercially available DLC coatings have been compared to near-frictionless carbon (NFC) coatings and to uncoated metal in standardized...

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Bibliographic Details
Published in:Surface & coatings technology 2004-02, Vol.179 (2), p.237-244
Main Authors: Hershberger, J., Öztürk, O., Ajayi, O.O., Woodford, J.B., Erdemir, A., Erck, R.A., Fenske, G.R.
Format: Article
Language:English
Subjects:
ADVANCED PROPULSION SYSTEMS
Amorphous
AMORPHOUS STATE
CARBON
CHEMICAL VAPOR DEPOSITION
COATINGS
COMPARATIVE EVALUATIONS
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
FRICTION
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
MATERIALS SCIENCE
Mechanical and acoustical properties
Physical properties of thin films, nonelectronic
Physics
Plasma-assisted chemical vapor deposition (PACVD)
Profilometry
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
TESTING
WEAR
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Summary:The suitability of diamond-like carbon (DLC) coatings for reduction of friction and wear in spark-ignited, direct-injected fuel systems has been investigated. Three commercially available DLC coatings have been compared to near-frictionless carbon (NFC) coatings and to uncoated metal in standardized lubricity tests and custom wear tests intended to simulate the fuel system environment. The coatings were applied to both laboratory balls and flats and to production fuel injector tips. These coatings provided improvements in friction and wear over uncoated surfaces, with the greatest improvements found in parts coated with NFC.
ISSN:0257-8972
1879-3347
DOI:10.1016/S0257-8972(03)00859-4