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Investigation on Relationship between LSPI and Lube Oil Consumption and Its Countermeasure
Technical Paper
2021-01-0567
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE WCX Digital Summit
Language:
English
Abstract
LSPI (Low speed pre-ignition) is a serious issue in highly boosted gasoline engines. The causes have been studied and lube oil affects the onset. In order to examine the effect of lubricating oil consumption on super knock caused by pre-ignition, measurements of in-cylinder pressure, temperature, oil consumption by sulfur trace at steady and transient conditions were conducted. Also, new piston ring pack was applied to reduce both of blow-by gas and oil consumption. As a result, accumulated oil during deceleration was found to cause pre-ignition after acceleration. The pre-ignition frequency is much higher than in steady condition, however, the amount of oil does not directly affect pre-ignition frequency, but dilution of oil and evaporation of oil/fuel and other parameters, such as temperature, pressure, and oil additives determine pre-ignition onset. In order to see the mechanism of pre-ignition onset, numerical simulations were conducted. Pseudo ignition was made in simulation and strong pressure resonance was found when pre-ignition occurs near intake-side crevice. This is due to the environmental conditions, such as equivalence ratio, temperature and pressure, match up early auto-ignition and fast flame propagation, leading to primary resonance mode. An improved piston ring pack using Labyrinth seal structure and V-cut in third land achieved reductions in both blow-by amount and oil consumption, leading to much less pre-ignition.
Authors
Citation
Moriyoshi, Y., Kuboyama, T., Takaki, T., and Hitosugi, H., "Investigation on Relationship between LSPI and Lube Oil Consumption and Its Countermeasure," SAE Technical Paper 2021-01-0567, 2021, https://doi.org/10.4271/2021-01-0567.Data Sets - Support Documents
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References
- Kuboyama , T. , Moriyoshi , Y. , and Morikawa , K. Visualization and Analysis of LSPI Mechanism Caused by Oil Droplet, Particle and Deposit in Highly Boosted SI Combustion in Low Speed Range SAE International Journal of Engines 8 2 529 537 2015 https://doi.org/10.4271/2015-01-0761
- Moriyoshi , Y. , Yamada , T. , Tsunoda , D. , Xie , M. et al. Numerical Simulation to Understand the Cause and Sequence of LSPI Phenomena and Suggestion of CaO Mechanism in Highly Boosted SI Combustion in Low Speed Range SAE Technical Paper 2015-01-0755 2015 https://doi.org/10.4271/2015-01-0755
- Moriyoshi , Y. , Kuboyama , T. , Morikawa , K. , Yamada , T. et al. A Study of Low Speed Preignition Mechanism in Highly Boosted SI Gasoline Engines SAE Int. J. Engines 9 1 98 106 2016 https://doi.org/10.4271/2015-01-1865
- Michlberger , A. , Sutton , M. , Kocsis , M. , Anderson , G. et al. On-Road Monitoring of Low Speed Pre-Ignition SAE Technical Paper 2018-01-1676 2018 https://doi.org/10.4271/2018-01-1676
- Wolff , A. Numerical Analysis of Gas Flow through the Labyrinth Seal of Piston Rings of an Automotive IC Engine 2018 IOP Conference Series Materials Science and Engineering 421 4 042082 10.1088/1757-899X/421/4/042082
- Shahlari , A. , and Ghandhi , J. Pressure-Based Knock Measurement Issues SAE Technical Paper 2017-01-0668 2017 https://doi.org/10.4271/2017-01-0668
- https://convergecfd.com/.
- Draper , C.S. Pressure Waves Accompanying Detonation in the Internal Combustion Engine J. Aeronautical Sci. 5 6 1938 doi.org/10.2514/8.590
- Hitosugi , E. , Nakada , F. , and Yoshikawa , N. Oil Going-Up Mechanism Analysis for Lube Oil Consumption Stabilization JSAE Trans. 46 2 289 2015 doi.org/10.11351/jsaeronbun.46.289