HCCI Combustion of Natural Gas and Hydrogen Enriched Natural Gas
Combustion Control by Early Direct Injection of Diesel Oil and RME 2008-01-1657
Natural gas and hydrogen enriched natural gas has been tested as fuels together with diesel oil and RME in a single cylinder Scania research engine. The gas was introduced as port injection while the diesel was introduced as early direct injection. Because the gas was premixed with air before combustion and the diesel was injected early in the compression stroke, the engine ran close to HCCI mode. However, a more precise description of the combustion would be PPC (Partially Premixed Combustion) as the diesel oil was not expected to be totally premixed. The experiments revealed that the combustion phasing could successfully be controlled by the amount of diesel oil injected for loads between 3.5 and 7.5 bar IMEPg at 1200 rpm. For a given combustion phasing, the hydrogen was not found to influence the required amount of diesel noticeable. However, a large difference between the RME and diesel oil could be seen by the necessity to inject more RME to obtain the same combustion phasing. The smoke emission was low (FSN below 0.1), indicating a low degree of rich zones.
Citation: Saanum, I., Bysveen, M., Tunestål, P., and Trajkovic, S., "HCCI Combustion of Natural Gas and Hydrogen Enriched Natural GasCombustion Control by Early Direct Injection of Diesel Oil and RME," SAE Technical Paper 2008-01-1657, 2008, https://doi.org/10.4271/2008-01-1657. Download Citation
Inge Saanum, Marie Bysveen, Per Tunestål, Sasa Trajkovic
Norwegian University of Science and Technology, Lund University
2008 SAE International Powertrains, Fuels and Lubricants Congress