🔍 Key Concepts

• Study the injection cycle graph at the top center, especially the section labeled "Metering (Orifice Open)". • Look at the fuel flow path (blue) in views A–D and note what is happening while the metering orifice is open versus when the nozzle actually sprays. • Notice what the label "Injector Pre‑load (Torque Setting)" refers to on the diagram, and whether it is tied to fuel quantity or to mechanical seating/contact.

💭 Think About

• During the metering phase (view A), what is moving, what is open, and what is supplying the pressure that fills the injector? How would that affect how much fuel is stored for the next injection? • Is the fuel quantity determined during the time the nozzle is spraying (view C), or earlier while the injector is being filled (view A/B)? • Ask yourself whether cylinder compression conditions or the torque on the injector body can actually change how much fuel gets into the injector before injection starts.

✅ Before You Answer

• Verify which part of the cycle is explicitly labeled as "metering" on both the graph and the section views. • Confirm what factor controls how long the metering orifice remains open while fuel is flowing in under pump pressure. • Make sure you distinguish between settings that affect injection timing/seat force and those that truly control the volume of fuel metered into the injector.