Engine Cleanliness in an Industry Standard Mercedes-Benz M111 Bench Engine: Effects of Inlet Valve Deposits on Combustion
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 08, 2017 by SAE International in United States
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Port fuel injected (PFI) technology remains the most common fuel delivery type present in the marketplace for gasoline spark ignition engines and a legacy vehicle fleet featuring PFI technology will remain in the market for decades to come. This is especially the case in parts of Asia where PFI technology is still prominent, although direct injection (DI) technology adoption is starting to catch up.
PFI engines can, when operated with lower quality fuels and lubricants, build up performance impairing deposits on a range of critical engine parts including in the fuel injectors, combustion chamber and on inlet valves. Inlet valve deposits (IVDs) in more severe cases have been associated with drivability issues such as engine stumble and engine hesitation on sudden acceleration. Deposit control additives in gasoline formulations are a well-established route to managing and even reversing fuel system fouling.
This study, involving an industry standard, Mercedes-Benz M-111 PFI bench engine heavily augmented with measurement equipment, was able to obtain a deeper understanding of the negative impacts of IVDs on engine performance and efficiency. By using a test cycle based on the CEC method F-20-98 but of increased severity it was established that IVDs lead to an increased combustion duration as measured based on the delta of the spark point to the center of combustion (CA50, MFB50%). This sluggish combustion behavior was corroborated by supporting secondary metrics such as engine out emissions and increases in exhaust temperatures. Changes in air-flow into the combustion chamber were investigated using a steady state flow bench as a potential cause for the observed changes in combustion phasing and resulting sluggish combustion.
CitationGlawar, A., Volkmer, F., Ziman, P., Groves, A. 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, https://doi.org/10.4271/2017-01-2239.
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- Just Auto, "QUBE database based on Just Auto, LMC automotive and industry sources - Market forecasts by engine injection technology" 2017. [Online].
- The Coordinating European Council, "Fuel Economy Effects of Engine Lubricants (MB M111 E20); CEC Code: CEC L-54-96" [Online]. Available: http://www.cectests.org/.
- The Coordinating European Council, "Deposit Forming Tendency on Intake Valves. CEC Code: CEC F-20-98" [Online]. Available: http://www.cectests.org/.
- Kalghati, G., "Fuel/Engine Interactions," (Warrendale, SAE International, 2013), pp. 63-108, doi:10.4271/R-409.
- Costa, J., Sarkisov, L., Seaton, N., and Cracknell, R., "Adsorption-based Structural Characterization of Intake Valve Deposits," SAE Technical Paper 2011-01-0901, 2011, doi:10.4271/2011-01-0901.
- Bannon, S., Avery, N., Bitting, W., Carlson, C. et al., "Coordinating Research Council Development of a CRC Intake Valve Deposit Test," SAE Technical Paper 940348, 1994, doi:10.4271/940348.
- Arters, D., Schiferl, E., and Szappanos, G., "Effects of Gasoline Driveability Index, Ethanol and Intake Valve Deposits on Engine Performance in a Dynamometer-Based Cold Start and Warmup Procedure," SAE Technical Paper 2002-01-1639, 2002, doi:10.4271/2002-01-1639.
- American Automobile Association, Inc., "AAA Fuel Quality Research: Proprietary research into the effectiveness of fuel additive packages in commercially-available gasoline" 2016.
- Esaki, Y., Ishiguro, T., Suzuki, N., and Nakada, M., "Mechanism of Intake-Valve Deposit Formation Part 1: Characterization of Deposits," SAE Technical Paper 900151, 1990, doi:10.4271/900151.
- Eng, K., Carlson, C., Hayden, T., and Sung, R., "Engine Test Procedures to Evaluate Octane Requirement Increase and Intake System Cleanliness," SAE Technical Paper 892122, 1989, doi:10.4271/892122.
- Gething, J., "Performance=Robbing Aspects of Intake Valve and Port Deposits," SAE Technical Paper 872116, 1987, doi:10.4271/872116.
- 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, doi:10.4271/2007-01-0004.
- Stepien Z., "Intake valve and combustion chamber deposits formation -engine and fuel related factors that impact their growth" Nafta-Gaz, vol. LXX, no. 4, pp. 236-242, 2014.
- 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, doi:10.4271/2006-01-0229.
- Stone, R., "Introduction to Internal Combustion Engines," (Warrendale, Society of Automotive Engineers Inc., 1999), pp. 22-49, ISBN 978-0-7680-2084-7.
- 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, doi:10.4271/2012-01-0391.