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Advantages of hydrogen addition in a passive pre‐chamber ignited SI engine for passenger car applications
Author(s) -
Benajes J.,
Novella R.,
GomezSoriano J.,
Barbery I.,
Libert C.
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6648
Subject(s) - gasoline , hydrogen , ignition system , combustion , hydrogen vehicle , thermal efficiency , combustion chamber , lean burn , automotive engineering , process engineering , compression ratio , cold start (automotive) , spark ignition engine , materials science , internal combustion engine , ignition timing , waste management , hydrogen fuel , engineering , chemistry , nox , aerospace engineering , organic chemistry
Summary Hydrogen is one of the most promising alternative fuels for the transportation industry. The use of hydrogen to enable lean burn in internal combustion engines is an attractive solution for reducing CO 2 emissions from two points of views: the substitution of carbon‐based fuels and the increased thermal efficiency due to lean operation. Combining this strategy with the passive pre‐chamber ignition system with gasoline/hydrogen blends is even more interesting. The main limitations of the passive pre‐chamber concept in a high compression ratio spark‐ignition engine were shown through engine experiments. A numerical study was then performed to evaluate the chance of extending the dilution limit by using hydrogen along with this technology. Results show how the use of hydrogen provides considerable benefits in the main chamber combustion process by enhancing the thermo‐chemical properties of the mixture, increasing the flame speed, and improving the flame structure. Using an adequate gasoline‐hydrogen blend proved to enable optimum burning rates at lean conditions, leading to a relevant thermal efficiency gain.