Internal　combustion　engines　fueled　with　mixtures　of　hydrogen　(H2)　and　ammonia　(NH3)　are　potential　power　devices　for　reducing　carbon　emissions.　To　improve　the　ignition　and　combustion　performance　of　NH3/H2,　turbulent　jet　ignition　(TJI)　can　be　used.　This　study　aims　to　investigate　NH3/H2/air　combustion　under　TJI　modes　at　low　equivalence　ratios.　Considering　that　the　adoption　of　the　scavenging　system　is　beneficial　for　improving　the　reactivity　of　the　pre-chamber,　the　effect　of　active　TJI　with　scavenging　is　also　explored.　The　results　show　that　injecting　1.2　times　the　initial　mixture　volume　of　air　is　optimal　for　scavenging,　and　the　scavenging　effect　becomes　significant　as　the　NH3　fraction　increases.　Using　conventional　active　TJI　and　active　TJI　with　scavenging　effectively　improves　ignition　performance　and　flame　propagation,　reducing　sensitivity　to　the　equivalence　ratio　compared　to　passive　TJI　mode.　Although　the　adoption　of　active　TJI　modes　improves　the　lean　flammability　limit　of　NH3/H2,　weak　flame　propagation　may　occur　in　the　early　stage　of　combustion　under　ultra-lean　conditions.　Appropriately　increasing　the　injection　of　auxiliary　H2　can　effectively　improve　this　phenomenon.