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Development of Seat Inserts and Valves for Dedicated CNG Engine Converted From Diesel Engine
Technical Paper
2016-01-1089
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In Internal Combustion (I.C.) engines, seat inserts and valves are the major components responsible for performance, emissions and reliability. Failure of these components can cause performance deterioration. In case of compressed natural gas (CNG) engines, impact on life of seat inserts and valves are adversely affected due to its dry combustion environment and high operating temperatures.
Greaves cotton has developed a single cylinder, water cooled, dedicated CNG engine with port injection from the base diesel engine. Major challenges were encountered during the CNG engine development with respect to seat inserts and valves wear. The design was modified considering the different design parameters to arrest failure modes as given below:
- 1Seat insert material compatibility
- 2Seat angle
- 3Seat width
- 4Valve head stiffness
- 5Alignment of seat inserts and valves
- 6Valves closing velocities.
Valves & seat inserts wear could be successfully resolved by design modifications and the same was validated through engine bed & vehicle level testing.
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Citation
Shrivas, J., Khairnar, G., Pande, S., Hussaini, Y. et al., "Development of Seat Inserts and Valves for Dedicated CNG Engine Converted From Diesel Engine," SAE Technical Paper 2016-01-1089, 2016, https://doi.org/10.4271/2016-01-1089.Also In
References
- The contribution of Natural Gas Vehicles to sustainable transport (International Energy Agency) Michiel Nijboer
- Valve seat Inserts - State of the art end of 2001 Krüger Gerd
- Greaves Cotton Ltd. Rated Power Test Procedure “GCLR&D/RP/TP-007”
- Introduction to engine valve train Wang yushu
- Critical Component wear in heavy duty engines Lakshinarayanan P.A.