Author:
LOW-KAME Jean,Oung Richard,Meissonnier Guillaume,Da Graca Mathieu,Doradoux Laurent,Foucher Fabrice
Abstract
<div class="section abstract"><div class="htmlview paragraph">Dihydrogen, as a zero CO<sub>2</sub> fuel, is a strong candidate for internal combustion engine to limit global warming. This study shows the impact of standard tuning parameters on mixture homogeneity and combustion characteristics. A 2.2L Diesel engine on which the head was reworked to allow side mounted direct injector and central mounted spark plug was selected. The discussed tests were made at low engine speed and partial load. A spark advance sweep at different air-fuel ratios (λ) was conducted. The exponential relation between λ and NO<sub>x</sub> emissions is highly marked and extremely low NO<sub>x</sub> emissions up to 1.7 g/kWh at minimum spark advance for maximum brake torque can be measured. A λ sweep was performed at different starts of injection (SOI). The results show that, depending on the engine speed, a later SOI might lead to lower NO<sub>x</sub> emissions. For a λ setpoint of 1.8, at 1500 rpm, late SOI leads to 30% higher NO<sub>x</sub> emissions where at 2500 rpm these emissions are 26% lower. This assessment is explained by the cycle-to-cycle variations. Finally, the second λ sweep, where the rail pressure (P<sub>rail</sub>) was varied, reveals that maximizing the P<sub>rail</sub> does not necessarily lower down NO<sub>x</sub> emissions. At 2500 rpm of engine speed, for richer mixtures than λ = 1.8, the higher P<sub>rail</sub> leads to higher NO<sub>x</sub> emissions. Having a lower P<sub>rail</sub> might lead to a slightly leaner mixture near the spark plug at spark timing. This effect extends the ignition delay thus lower the NO<sub>x</sub> emissions.</div></div>
Reference26 articles.
1. International Panel on Climate Change Climate Change 2022: Impacts, Adaptation and Vulnerability 2022 https://doi.org/10.1017/9781009325844
2. International Panel on Climate Change Climate Change 2014: Synthesis Report 2014
3. Heywood , J.B. Internal Combustion Engine Fundamentals McGraw-Hill Book Company 1988
4. Lopes , S. and Geng , P. Estimation of Elemental Composition of Diesel Fuel Containing Biodiesel SAE Int. J. Fuels Lubr. 6 3 2013 668 676 https://doi.org/10.4271/2013-01-2600
5. Conway , G. , Joshi , A. , Leach , F. , Garcia , A. , et al. A Review of Current and Future Powertrain Technologies and Trends in 2020 Transportation Engineering 5 2021 100080 2666-691X https://doi.org/10.1016/j.treng.2021.100080
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