Combustion Phasing Indicators for Optimized Spark Timing Settings for Methane-Hydrogen Powered Small Size Engines CNR Consiglio Nazionale delle Ricerche

Format:

Book

Conference/Event

Author/Creator:

Irimescu, Adrian, author.

Contributor:

Cecere, Giovanni

Sementa, Paolo

Conference Name:

WCX SAE World Congress Experience (2022-04-05 : Detroit & Online, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2022

Summary:

In the intermediate stage towards zero-emissions, use of methane-hydrogen blends in spark ignition (SI) engines could represent an attractive application. The present work investigated the relevance of empirical base rules for choosing maximum brake torque spark timing settings when using methane-hydrogen blends. A 0D/1D model was used for investigating the optimized ignition for maximizing engine output. Calibration was performed by using in-cylinder pressure data recorded on a methane fueled small size SI engine for two-wheel applications. After adaptations of the model such as valves timing, for rendering it more representative for power generation applications, the investigation was focused on how MBT spark advance was correlated to the 50% mass fraction burned mark (CA50) and peak pressure location. The fact that they were optimized for methane was found to be essential only for high concentrations of hydrogen. Engine speed instead was found to exert an important influence on the optimal value of CA50. This is of relatively increased significance for the specific case of small SI engines that operate in a large range of crankshaft rotational speed

Notes:

Vendor supplied data

Publisher Number:

2022-01-0603

Access Restriction:

Restricted for use by site license