Experimental H2-ICE study using a heavy-duty single-cylinder setup ; Increasing the load range at low engine-out NOx emissions : Increasing the load range at low engine-out NOx emissions
conference paper
The port fuel injected spark ignited hydrogen combustion engine is considered as an attractive technology for realizing the global CO2 reduction targets. Next to zero CO2 emissions, the lean burn operation also has the potential for low engine-out NOx emissions. However, the use of port fuel injection is known to limit maximum power density caused by the engine charging hardware constraints. In this paper, the NOx reduction potential of the port fuel lean burn spark ignition hydrogen engine concept is investigated. Furthermore, the feasibility of extending the load range for low NOx operation by use of changes to the engine’s compression ratio and application of exhaust gas recirculation is examined. For this purpose a heavy duty single-cylinder research platform is used. The measurements show that ultra-low engine-out NOx emissions can be realized below the current and anticipated next generation legislative constraints. Selecting a proper compression ratio is crucial for maximizing the load range while maintaining low engine-out NOx. Relaxation of the boost pressure requirements for low engine-out NOx is targeted by applying Exhaust Gas Recirculation.
TNO Identifier
990930
Source title
Proceedings JSAE Annual Congress (Spring), May 25 – 27, 2022
Collation
6 p.
Files
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