ANALYSIS OF THE SURFACE LAYER FORMATION OF SINGLE-CYLINDER ENGINE COMBUSTION CHAMBER WITH PHOSPHOROUS-FREE AND CONVENTIONAL ENGINE LUBRICANTS

Creative Commons License

Yüksek L., Kaleli H., Özkan D.

JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION, vol.20, no.1, pp.116-123, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 20 Issue: 1
  • Publication Date: 2014
  • Journal Name: JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.116-123
  • Yıldız Technical University Affiliated: Yes

Abstract

Phosphorus-free engine lubricants are gaining importance for preventing catalyst poisoning which is the major deactivation mechanism that causes the malfunction of 3-way catalysts. The main purpose of this paper is to evaluate the mechanism of surface layer formation on combustion chamber of spark ignition engines with phosphorous-free and phosphorous-containing engine lubricants. An experimental endurance test was conducted for 100 h at equal load conditions for each lubricant. Endurance tests were applied with a laboratory engine test bench. Subsequently, engines dismantled and cylinder liners were cut accurately to obtain specimens for microscopic examination. Optical microscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy methods were used for evaluation.