Effects of Injection Timing on the Exhaust Emissions of a Centrally-Injected Four-Valve Direct-Injection Spark-Ignition Engine 982700
A study to investigate the influence of fuel injection timing on exhaust emissions from a single-cylinder direct-injection spark-ignition (DISI) research engine was performed. Experimental results were obtained for carbon monoxide (CO), unburned hydrocarbon (HC), and oxides of nitrogen (NOx). Images showing the variation of liquid-phase fuel distribution with changing injection timing were obtained in a firing optically-accessed engine of similar design. A correlation between measured emissions and observed liquid-phase fuel distribution was performed. This correlation was supported by development of phenomenological models that permit explanation of the variation of CO, HC, and NOx emissions with changes in air-fuel mixture preparation.
Citation: Williams, P., Davy, M., and Brehob, D., "Effects of Injection Timing on the Exhaust Emissions of a Centrally-Injected Four-Valve Direct-Injection Spark-Ignition Engine," SAE Technical Paper 982700, 1998, https://doi.org/10.4271/982700. Download Citation
Author(s):
Paul A. Williams, Martin H. Davy, Diana D. Brehob
Affiliated:
University College London
Pages: 11
Event:
International Fall Fuels and Lubricants Meeting and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Direct Injection: Engines, Emissions, and Aftertreatment-SP-1399, SAE 1998 Transactions - Journal of Fuels and Lubricants-V107-4
Related Topics:
Nitrogen oxides
Carbon monoxide
Exhaust emissions
Emissions measurement
Hydrocarbons
Fuel injection
Spark ignition engines
Logistics
Research and development
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