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Comparative Analysis of Different Methodologies to Calculate Lambda (λ) Based on Extensive And systemic Experimentation on a Hydrogen Internal Combustion Engine Parthenope Uni of Naples,CNR STEMS,PUNCH
- Format:
- Book
- Conference/Event
- Author/Creator:
- Azeem, Naqash, author.
- Conference Name:
- WCX SAE World Congress Experience (2023-04-18 : Detroit, Michigan, United States)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2023
- Summary:
- Hydrogen Internal Combustion Engines (H2-ICEs) are subject to increased attention thanks to their extremely low criteria pollutant emission and near-zero CO2 tailpipe emissions. However, to further minimize exhaust emissions and increase the efficiency of a H2-ICE, it is important to carefully control the relative air-fuel ratio of operation, id est Lambda (λ), which will lead in turn to an optimal combustion process. The precise λ control mainly relies upon the methodology to calculate λ on board of the engine, where the availability of reliable sensors specifically-developed for hydrogen combustion is currently limited. In this article, a comparative analysis of different methodologies for the calculation of λ is performed, comparing four methodologies: exhaust gas analysis through a Spindt-Brettschneider approach (λEMI), raw Universal Exhaust Gas Oxygen (λR-UEGO), processed Universal Exhaust Gas Oxygen (λP-UEGO) and speed-density (λSD) outputs. The experimental data used to compare the four methodologies were acquired through detailed and systematic experimentation on a fully-instrumented single-cylinder H2-ICE. Results show that the λP-UEGO is the closest one to the reference Spindt-Brettschneider analysis λEMI and the most robust to ample variations in the nominal λ values. The sensor's raw UEGO output λR-UEGO is instead affected by the sensor calibration which is usually performed across a range of carbon-based fuels, a procedure that introduces a bias. The results can be used for the selection of the correct methodology to calculate λ in a H2-ICE and to choose optimal sensors for mobile applications
- Notes:
- Vendor supplied data
- Publisher Number:
- 2023-01-0340
- Access Restriction:
- Restricted for use by site license
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