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Effects of Post Injection on Piston Lubrication in a Common Rail Small Bore Diesel Engine
Technical Paper
2005-01-2166
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The authors et al. developed a unique single cylinder diesel engine equipped with a floating liner device for the measurement of piston friction force, aimed at the clarification of the relationship between the multiple fuel injections and the state of piston lubrication. Using this engine, the effects of the post fuel injections on the state of piston lubrication have been checked under this study, according to the variation in the piston friction force. As a result, it is verified that the oil film on the cylinder near the top dead center is diluted immediately with the injected fuel, and that the piston lubrication deteriorates more than anticipated even for the case using the SAE 5W/30 oil, compared with the case where the SAE 0W/20 oil with a lower viscosity is used. It is confirmed, on the other hand, that the deterioration in piston lubrication can be suppressed by increasing the post injection pressure, and conducting the injection at a proper timing prior to the opening of exhaust valve.
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Citation
Oinuma, R., Takuma, S., Koyano, T., and Takiguchi, M., "Effects of Post Injection on Piston Lubrication in a Common Rail Small Bore Diesel Engine," SAE Technical Paper 2005-01-2166, 2005, https://doi.org/10.4271/2005-01-2166.Also In
References
- Horiuch H. et al. “The Hino E13C: A Heavy-Duty Diesel Engine Developed for Extremely Low Emission and Superior Fuel Economy” SAE Paper No. 2004-01-1312
- Henein N.A. et al. “Characteristics of A Common Rail Diesel Injection System Under Pilot and Post Injection Modes” SAE Paper No. 2002-01-0218
- Furuhama S. et.al. “Measurement of Piston Friction Force in Actual Operating Diesel Engine SAE Transactions 88 1979