With jet ignition, the main chamber air-fuel mixture
is ignited by multiple jets of hot reacting gases
issued by the jet ignition pre-chamber holes and
crossing the main chamber at very high speed. The
jet ignition pre-chamber is a small volume connected
to the main chamber volume through calibrated orifices
and accommodating a fuel injector and a spark
(or glow plug). The dedicated injector delivers a locally
stoichiometric fuel to the pre-chamber volume,
also receiving air from the main chamber during the
compression event.