燃油導軌(fuel rail),即高壓蓄壓器、油軌,是內燃機氣缸供油的噴油器前面的油路管道。它包含一個燃油入口(inlet)與為多個噴油器相連的座套(pocket或seat)。某些燃油導軌在一端有油壓調節器英語Regulator (automatic control)

燃油導軌、噴油嘴與油壓調節閥在4缸低壓汽油機上。

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