Monday, March 23, 2020

Sac volume of fuel injectors

The " sac" is a small volume within the fuel flow path of an electronic fuel injector . In this study , it is defined as the volume between the valve seat ( fuel shut off point ) and the entrance to the final metering orifice of the injector . This sac causes fuel injectors to deliver uncalliberated excess fuel when the engine is operated under closed throttle , high manifold vacuum conditions such as vehicle decelerations or idle.

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