🔍 Key Concepts

• Study the shape of the cylinder head and combustion space in the illustration. Is there any separate small chamber or cell connected by a narrow passage? • Recall that a turbulence (prechamber) or energy cell design always shows a clearly drawn small secondary chamber in the head, separate from the main cylinder volume. • Think about how fuel injection systems are arranged: external individual Bosch pumps versus a unit injector mounted directly in the head and operated by the valve train.

💭 Think About

• From the picture alone, decide whether combustion seems to occur only in the main cylinder space, or first in a small separate chamber before spreading to the main cylinder. • Look at the top of the cylinder near the valves: do you see any distinctive passages or chambers that would be labeled as a cell or prechamber, or does it look like a simple open combustion chamber? • Consider which answer choices describe where combustion starts (chamber/cell shape) versus how the fuel is pressurized and delivered (type of pump/injector). Which fits what you can actually see in this section view?

✅ Before You Answer

• Verify whether the head shows a separate enclosed pocket (energy cell or turbulence chamber) connected to the cylinder by a narrow throat. If you don’t see that, eliminate those options. • Check if the illustration shows any component in the head that appears to combine a cam‑driven plunger and nozzle (typical of a unit injector) versus only valves and rocker arms. • Make sure the option you pick matches a feature that can be clearly identified in the drawing itself, not just something that could be somewhere off‑screen in the fuel system.