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Understanding the Adverse Effects of Inlet Valve Deposits on SI Engine Operation, through a Novel Technique to Create Surrogate Deposits
Technical Paper
2018-01-1742
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
For gasoline spark ignition engines, port fuel injection (PFI) on a global basis remains the most common type of fuel delivery. When operated with lower quality fuels and lubricants, PFI engines are prone to suffering from the build-up of harmful deposits on critical engine parts including the inlet valves. High levels of inlet valve deposits (IVDs) have been associated with drivability issues like engine stumble and hesitation on sudden acceleration. Fuels formulated with the appropriate level of deposit control additive (DCA) can maintain engine cleanliness and even remove deposits from critical components.
This study, involving a single cylinder research bench engine operated in PFI injection mode and heavily augmented with measurement equipment, aimed to gain a deeper understanding of the detrimental impacts of IVDs on engine efficiency and performance. Guided by 3D-scans of carbonaceous IVDs sourced from industry standard tests conducted per ASTM D5500, surrogate metal deposits were generated, utilizing the novel approach of powder-laser-cladding (PLC). The modified inlet valves were evaluated in the research engine across eight different speed load conditions including full-load. Using this approach and building on the results previously obtained on the industry standard Mercedes-Benz M111 bench engine, it was possible to quantify an increase of more than 3 crank angle degrees in combustion duration at a 95% level of statistical confidence, due to the presence of the simulated IVDs. Similarly, IVDs limited the quantity of air entering the cylinder which reduced power output of the engine for a given condition by 1.9% at a 99% level of statistical confidence. These effects were corroborated by supporting secondary metrics such as exhaust temperature increases and peak pressure reductions. Overall, it was shown that the presence of IVDs shifted the center of combustion away from the engine’s optimum point for efficiency as defined by the maximum brake torque (MBT) spark timing.
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Authors
- Andreas F. G. Glawar - Shell Global Solutions (US) Inc.
- Pauline R. Ziman - Shell Global Solutions (UK)
- Kaihua Wu - Shell (Shanghai) Technology Ltd.
- Vinod Natarajan - Shell Global Solutions (US) Inc.
- Eike J. Wolgast - Shell Global Solutions (Deutschland) GmbH
- Carolin Dankers - Shell Global Solutions (Deutschland) GmbH
- Adrian P. Groves - Shell Global Solutions (UK)
Topic
Citation
Glawar, A., Ziman, P., Wu, K., Natarajan, V. et al., "Understanding the Adverse Effects of Inlet Valve Deposits on SI Engine Operation, through a Novel Technique to Create Surrogate Deposits," SAE Technical Paper 2018-01-1742, 2018, https://doi.org/10.4271/2018-01-1742.Data Sets - Support Documents
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References
- Kalghati , G. Chapter 3: Deposits in Internal Combustion Engines Fuel/Engine Interactions Warrendale SAE International 2014 63 108
- Esaki , Y. , Ishiguro , T. , Suzuki , N. , and Sung , R. Mechanism of Intake-Valve Deposit Formation Part 1: Characterization of Deposits SAE Technical Paper 900151 1990 10.4271/900151
- Tupa , R. and Koehler , D. Intake Valve Deposits - Effects of Engines, Fuels & Additives SAE Technical Paper 881645 1988 10.4271/881645
- Xu , H. , Wang , C. , Ma , X. , Sarangi , A. et al. Fuel Injector Deposits in Direct-Injection Spark-Ignition Engines Progress in Energy and Combustion Science 50 63 80 2015
- Gail , S. , Nomura , T. , Hayashi , H. , Miura , Y. et al. An Intake Valve Deposit (IVD) Engine Test Development to Investigate Deposit Build-Up Mechanism Using a Real Engine SAE Technical Paper 2017-01-2291 2017 10.4271/2017-01-2291
- Price , R. , Martin , D. , Dickens , N. , and Bohr , P. The Impact of Inlet Valve Deposits on PFI Gasoline SI Engines - Quantified Effects on Fuel Consumption SAE Technical Paper 2007-01-0004 2007 10.4271/2007-01-0004
- Costa , J. , Sarkisov , L. , Seaton , N. , and Cracknell , R. Adsorption-Based Structural Characterization of Intake Valve Deposits SAE Technical Paper 2011-01-0901 2011 10.4271/2011-01-0901
- Glawar , A.F.G. , Volkmer , F. , Ziman , P.R. , Groves , A.P. et al. Engine Cleanliness in an Industry Standard Mercedes-Benz M111 Bench Engine: Effects of Inlet Valve Deposits on Combustion SAE Technical Paper 2017-01-2239 2017 10.4271/2017-01-2239
- Joedicke , A. , Krueger-Venus , J. , Bohr , P. , Cracknell , R. et al. Understanding the Effect of DISI Injector Deposits on Vehicle Performance SAE Technical Paper 2012-01-0391 2012 10.4271/2012-01-0391
- Behrendt , C. and Smith , A. A Study of Diesel Fuel Injector Deposit Effects on Power and Fuel Economy Performance SAE Technical Paper 2017-01-0803 2017 10.4271/2017-01-0803
- Gething , J.A. Performance-Robbing Aspects of Intake Valve and Port Deposits SAE Technical Paper 872116 1987 10.4271/872116
- Ayala , F. , Gerty , M. , and Heywood , J. Effects of Combustion Phasing, Relative Air-Fuel Ratio, Compression Ratio, and Load on SI Engine Efficiency SAE Technical Paper 2006-01-0229 2006 10.4271/2006-01-0229