CFD Study of Impact of Part-to-Part Variations on Spark-Ignition Engine Charge Formation

Technical Report · Thu Feb 14 04:00:00 EST 2019

DOI:https://doi.org/10.2172/1496042· OSTI ID:1496042

Ameen, Muhsin M. ^[1]; Som, Sibendu ^[1]

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1. Argonne National Lab. (ANL), Argonne, IL (United States). Energy System Division

Spark-ignition engines are the backbone behind people transportation around the world. The efficiency of spark-ignition engines is limited in practice by variations between engine cycles and cylinders within an engine that result from the manufacturing processes/tolerances. These variations impact knock limits and dilution tolerance, which results in more conservative settings for design and calibration settings, such as compression ratio, valve timing, and exhaust gas recirculation rates. Engine variations also have a significant impact on emissions generation, which can have a secondary impact on efficiency. A deeper understanding of the relative importance of these variations and their interactions on the charge preparation process can guide future decisions on machining tolerances and control strategies. This project will develop simulation tools and methodology to include the effects of some key manufacturing tolerances and their impact on engine performance and emissions.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Advanced Manufacturing Office
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1496042
• Report Number(s): ANL/ES--C2017-17083; 150505
• Country of Publication: United States
• Language: English

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