This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Spark Ignition, Lean-Homogeneous Combustion, Engine Emission Control System for a Small Vehicle
Annotation ability available
Sector:
Language:
English
Abstract
Theoretically, the combustion of homogeneous, lean air-fuel mixtures offers potentially low emissions with low fuel consumption. An experimental investigation of a lean-combustion engine system, equipped with a lean thermal reactor, was conducted with a 1130 kg (2500 lb) vehicle. The effects of spark timing on vehicle emissions, fuel consumption, and lean reactor performance were determined.
Retarded spark timing decreased HC and CO emissions, did not affect NOx emissions, and increased fuel consumption. Over-advanced spark timing decreased CO emissions, increased HC and NOx emissions, and increased fuel consumption.
The vehicle emission levels were very sensitive to spark timing changes and carburetor calibration repeatability. Thus, implementation of such a vehicle would require careful control of these engine variables.
Citation
Pozniak, D., "A Spark Ignition, Lean-Homogeneous Combustion, Engine Emission Control System for a Small Vehicle," SAE Technical Paper 760225, 1976, https://doi.org/10.4271/760225.Also In
References
- Stivender D. L. “Development of a Fuel-Based Mass Emission Measurement Procedure,” Paper 710604 SAE Mid-year Meeting Montreal June 1971
- Huls T. A. Myers P. S. Uyehara O. A. “Spark Ignition Engine Operation and Design for Minimum Exhaust Emission,” Paper 660405 SAE Mid-year Meeting Detroit June 1966
- Herrin R. J. “Lean Thermal Reactor Performance Characteristics -- A Screening Study,” SAE Automotive Engineering Congress and Exposition Detroit February 1976
- Patterson D. J. et al. “Kinetics of Oxidation and Quenching of Combustibles in Exhaust Systems of Gasoline Engines,” Progress Report 29 July 1971