Answer :
Final answer:
Common rail injectors close their nozzles using high pressure fuel, which enhances engine efficiency and control. This method has surpassed older mechanical systems that relied on spring tension. The electronic management of fuel pressure allows for optimal operation of the injector.
Explanation:
Understanding Common Rail Injectors
In later model common rail injectors, the nozzle is closed primarily by high pressure fuel. This design allows for improved fuel atomization and more precise control of fuel delivery into the combustion chamber, which enhances engine efficiency and reduces emissions.
When the engine demands more power, the electronic control unit manages the fuel pressure supplied to the injector, thus allowing the nozzle to open and close at optimal times. This system has largely replaced older mechanical injector systems that depended on spring tension and other less efficient methods.
Summary of Injection Mechanism
- High pressure fuel acts to close the nozzle.
- This method improves engine performance.
- Modern electronic controls manage fuel pressure efficiently.
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