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High pressure is created by which component?

Please select the best answer from the choices below:

A. The high pressure fuel rail.
B. A pump driven by the exhaust camshaft.
C. The injectors electromagnetically increase the pressure.
D. The fuel pump in the fuel tank unit.

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.

  1. 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.

  2. 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.

  3. 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.

  4. 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.

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