Effects of thermal barrier coating on gas emissions and performance of a LHR engine with different injection timings and valve adjustments

Ekrem Büyükkaya*, Tahsin Engin, Muhammet Cerit

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

Tests were performed on a six cylinder, direct injection, turbocharged Diesel engine whose pistons were coated with a 350 μm thickness of MgZrO 3 over a 150 μm thickness of NiCrAl bond coat. CaZrO3 was employed as the coating material for the cylinder head and valves. The working conditions for the standard engine (uncovered) and low heat rejection (LHR) engine were kept exactly the same to ensure a realistic comparison between the two configurations of the engine. Comparisons between the standard engine and its LHR version were made based on engine performance, exhaust gas emissions, injection timing and valve adjustment. The results showed that 1-8% reduction in brake specific fuel consumption could be achieved by the combined effect of the thermal barrier coating (TBC) and injection timing. On the other hand, NOx emissions were obtained below those of the base engine by 11% for 18° BTDC injection timing.

Original languageEnglish
Pages (from-to)1298-1310
Number of pages13
JournalEnergy Conversion and Management
Volume47
Issue number9-10
DOIs
Publication statusPublished - Jun 2006
Externally publishedYes

Funding

This study has been financially supported by The Scientific and Research Council of Turkey (TUBITAK-MISAG-30). TUBITAK’s support is greatfully acknowledged.

FundersFunder number
Scientific and Research Council of TurkeyTUBITAK-MISAG-30

    Keywords

    • Diesel engine
    • Exhaust gas emissions
    • Injection timing
    • LHR engine
    • Low heat rejection
    • Performance
    • Thermal barrier coating

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