This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Determination of Efficiency Losses in Entry Ignition Engines
Technical Paper
2021-01-0441
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Event:
SAE WCX Digital Summit
Language:
English
Abstract
In 2020, Cheeseman (SAE Paper 2020-01-1314) introduced Entry Ignition (EI) as a potential engine combustion process to rival traditional Spark Ignition (SI) and Compression Ignition (CI). The EI process premixes fuel with compressed air, which then enters a hot cylinder at top dead center, autoigniting upon entry. The original proposed concept for an engine separates the compression and expansion processes allowing for it to be modeled as a 2-stroke Brayton cycle. Theoretically, an EI engine allows for higher compression ratios than SI engines with less emissions than CI engines. However, the original EI engine analysis made several assumptions that merit further investigation. First, the original analysis did not look at the temperatures and pressures in the air/fuel mixing chamber to ensure that it does not autoignite prior to entering the cylinder. Second, the analysis did not account for the large amount of heat transfer associated with keeping half the end-gas in the cylinder. Third, the analysis neglected the losses caused by intake passageways and additional components. Our analysis corrects Cheeseman’s thermodynamic model to account for these changes to better identify a brake thermal efficiency for the EI cycle. Our analyses further identify other issues with the EI process to include frictional losses, operating at partial load, and emissions. With these corrections, the EI engine was found to perform with a similar or less efficiency than SI engines. Additionally, while it has the potential to reduce NOx emissions, the large quantity of residuals can result in an increase in CO emissions.
Topic
Citation
Mittal, V. and Novoselich, B., "Determination of Efficiency Losses in Entry Ignition Engines," SAE Technical Paper 2021-01-0441, 2021, https://doi.org/10.4271/2021-01-0441.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 |
Also In
References
- Cracknell , R. , Bastaert , D. , Houille , S. , Châtelain , J. et al. Assessing the Efficiency of a New Gasoline Compression Ignition (GCI) Concept SAE Technical Paper 2020-01-2068 2020 https://doi.org/10.471/2020-01-2068
- Chiodi , M. , Kaechele , A. , Bargende , M. , Wichelhaus , D. , and Poetsch , C. Development of an Innovative Combustion Process: Spark-Assisted Compression Ignition SAE International Journal of Engines 10 5 2486 2499 2017
- Cheeseman , P.C. A New Efficient Combustion Method for ICEs SAE Technical Paper 2020-01-1314 2020 https://doi.org/10.471/2020-01-1314
- Zhao , J. Research and Application of Over-Expansion Cycle (Atkinson and Miller) Engines-A Review Applied Energy 185 300 319 2017
- Heywood , J. Internal Combustion Engine Fundamentals New York McGraw Hill 1988
- Date , T. , and Yagi , S. Research and Development of the Honda CVCC Engine SAE Technical Paper 740605 1974 https://doi.org/10.471/740605
- Nakakita , K. Research History of High-Speed, Direct-Injection Diesel Engine Combustion Systems for Passenger Cars R&D Rev Toyota CRDL 45 43 56 2014
- Livengood , J. , and Wu , P. Correlation of Autoignition Phenomenain Internal Combustion Engines and Rapid Compression Machines Symp Int Combust 1955
- Douaud , A.M. , and Eyzat , P. Four-Octane-Number Method for Predicting the Anti-Knock Behavior of Fuels and Engines SAE Technical Paper 780080 87 1978
- Woschni , G. A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine SAE Technical Paper 670931 1967 https://doi.org/10.4271/670931
- White , F. Fluid Mechanics 8th New York McGraw Hill 2015
- Mittal , V. , Revier , B.M. , and Heywood , J.B. Phenomena That Determine Knock Onset in Spark-Ignition Engines SAE Technical Paper 2007-01-007 2007 https://doi.org/10.4271/2007-01-007
- Starr , F. Development of the Poppet Type Exhaust Valve in the Internal Combustion Engine: Part I 1860-1930 The International Journal for the History of Engineering & Technology 82 2 283 314 2012
- Yazdi , K. 1997
- Ferguson , C.R. , and Kirkpatrick , A.T. Internal Combustion Engine Applied Thermosciences New York Wiley 2016
- Wong , V.W. , and Tung , S.C. Overview of Automotive Engine Friction and Reduction Trends-Effects of Surface, Material, and Lubricant-Additive Technologies Friction 4 1 1 28 2016