Answer :
To determine which component creates high pressure, let's look at the typical components in a modern fuel injection system. In many fuel systems, high pressure is essential for efficient fuel injection and combustion.
The High Pressure Fuel Rail (A): While the fuel rail is indeed associated with high pressure, it does not create the pressure; it merely contains and distributes fuel at high pressure to the injectors.
A Pump Driven by the Exhaust Camshaft (B): Some fuel systems use a mechanical high-pressure fuel pump driven by the camshaft to increase the fuel pressure significantly compared to what the electric pump in the tank provides. A pump driven by the camshaft is often responsible for creating this high pressure in direct injection systems.
The Injectors Electromagnetically Increase the Pressure (C): Fuel injectors are designed to precisely spray fuel into the combustion chamber, but they do not have the capability to increase the pressure themselves; rather, they work with the pressure supplied to them.
The Fuel Pump in the Fuel Tank Unit (D): This pump primarily supplies fuel to the engine and generally provides a lower pressure than what's required for direct injection.
Given the choices, B. A Pump Driven by the Exhaust Camshaft is the component that is specifically designed to create high pressure in direct injection systems.
