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A Spark Ignition Engine with an In-Cylinder Thermal Reactor
Annotation ability available
Sector:
Event:
Fleet Week
Language:
English
Abstract
This paper describes a method and apparatus intended to minimize hydrocarbons (HC), carbon monoxide (CO), and nitric oxide (NO) in spark ignition engine exhaust by utilizing the unused displacement of the engine at part loads as an internal thermal reactor. The method used is to induct exhaust gas plus air into one portion of the cylinder and unthrottled fuel-air charge into the balance. The fuel-air charge is rich to minimize NO formation, but, as a result, the products of combustion contain HC and CO. Air is added to these products before re-induction to provide additional oxygen to complete the oxidation which is promoted by the high pressures and temperatures of compression and combustion. Load control is achieved by varying the relative amounts of fuel-air charge and recirculated exhaust.
Experimentally, it was shown that the necessary stratification existed until the spark occurred but not thereafter. The very low NO concentrations expected were realized, but HC and CO values were higher than desired.
Authors
Citation
Jessel, A., Uyehara, O., and Myers, P., "A Spark Ignition Engine with an In-Cylinder Thermal Reactor," SAE Technical Paper 730634, 1973, https://doi.org/10.4271/730634.Also In
References
- Myers P.S. Newhall H.K. Uyehara O.A. “The ABC's of Engine Exhaust Emissions.” SAE Transactions 80 1971 Paper 710481
- Newhall H.K. El-Messiri I.A. “A Combustion Chamber Designed for Minimum Engine Exhaust Emissions.” SAE Transactions 79 1970 Paper 700491
- Simko A. et al. “Exhaust Emission Control by the Ford Programmed Combustion Process-PROCO.” Paper 720052 SAE Automotive Engineering Congress Detroit January 1972
- February 10 1970
- April 21 1970
- Kuoda H. et al. “Economical Matching of the Thermal Reactor to Small Engine-Low Emission Concept Vehicles.” Paper 720484 SAE National Automobile Engineering Meeting Detroit May 1972 SP-370, Inter-Industry Emission Control Report
- Huls T. A. “Spark Ignition Engine Operation and Design for Minimum Exhaust Emissions.” 1966
- Piken A.G. Ruof C.H. “Chemical Composition of Automobile Exhaust and A/F Ratio.” Scientific Research Staff, Ford Motor Co. June 12 1968
- Sorenson S.C. “Kinetics of Ethane in the Exhaust of a Spark Ignition Engine.” 1970
- Sigworth, H.W. Jr. “The Disappearance of Ethylene Propylene, N-Butane, and 1-Butane in Spark Ignition Engine Exhaust Gas.” 1970