Answer :
Final answer:
The high-pressure injection pump in common rail fuel systems is driven by the engine's camshaft and pressurizes the fuel in a common rail at a constant rate. Injectors then decide when to release this fuel, improving control over injection.
Explanation:
A characteristic of the high-pressure injection pump used in common rail fuel systems is that it is driven by the engine's camshaft. This means that the injection pump is linked directly to the engine's timing. Instead of delivering fuel to each injector individually, the pump pressurizes the common rail at a constant pressure. The injectors, which are electronically controlled, then decide when to release the fuel to the engine's cylinders. This system effectively allows for more precise control over fuel injection, leading to improved performance and efficiency in the engine.
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