Influence of Hydrogen-Rich-Gas Addition on Combustion, Pollutant Formation and Efficiency of an IC-SI Engine 2004-01-0972
The addition of hydrogen-rich gas to gasoline in an Internal Combustion Engine seems to be particularly suitable to arrive at a near-zero emission Otto engine, which would be able to easily meet the most stringent regulations.
In order to simulate the output of an on-board reformer that partially oxidizes gasoline, providing the hydrogen-rich gas, a bottled gas has been used.
Detailed results of our measurements are here shown, such as fuel consumption, engine efficiency, exhaust emissions, analysis of the heat release rates and combustion duration, for both pure gasoline and blends with reformer gas. Additionally simulations have been performed to better understand the engine behaviour and NOx formation.
Results show that:
When running at λ=1 and without EGR, addition of hydrogen-rich gas produces a significant shortening of the very first phase of combustion (inflammation phase) rather than of the remaining combustion process;
Addition of hydrogen-rich gas allows to run the engine at extremely high λ or EGR rate;
When running at the highest possible λ or EGR (limited by COV increase) the duration of all phases of combustion remains almost unaffected by the diluents;
In all conditions a significant decrease of UHC and NOx emissions has been observed;
In all conditions a significant increase of engine efficiency has been measured, which seems to be enough to compensate and overcome the losses due to the partial oxidation of Gasoline in the Reformer.
Citation: Conte, E. and Boulouchos, K., "Influence of Hydrogen-Rich-Gas Addition on Combustion, Pollutant Formation and Efficiency of an IC-SI Engine," SAE Technical Paper 2004-01-0972, 2004, https://doi.org/10.4271/2004-01-0972. Download Citation
Author(s):
Enrico Conte, Konstantinos Boulouchos
Affiliated:
Aerothermochemistry and Combustion Systems Laboratory, ETH - Swiss Federal Institute of Technology
Pages: 19
Event:
SAE 2004 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
New Spark Ignition Engine and Component Design, and Spark Ignition Combustion-SP-1828, SAE 2004 Transactions Journal of Engines-V113-3
Related Topics:
Engine efficiency
Exhaust emissions
Nitrogen oxides
Combustion and combustion processes
Fuel consumption
Gasoline
Exhaust gas recirculation (EGR)
Gases
Corrosion
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