What do you understand by CRDI system give its salient feauters.

 Of course! Here’s a clear and simple explanation:

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CRDI System (Common Rail Direct Injection):

It is a modern fuel injection system used mainly in diesel engines.
In CRDI, fuel is supplied to the engine’s injectors from a common high-pressure rail (pipe).
Each injector is electronically controlled to deliver precise amounts of fuel directly into the combustion chamber.

In short:
➔ Common rail = a shared fuel pipe under high pressure
➔ Direct injection = fuel sprayed directly into the combustion chamber
➔ Electronic control = very precise timing and quantity of fuel injected

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Salient Features of CRDI System:

1. High Injection Pressure:
   ➔ Fuel is injected at very high pressure (up to 2000+ bar) for better atomization and complete combustion.

2. Precise Control:
   ➔ Electronic control unit (ECU) adjusts the injection timing and quantity very accurately for different engine conditions.

3. Multiple Injections per Cycle:
   ➔ Instead of a single big shot of fuel, CRDI can inject small amounts multiple times (pilot, main, and post-injections) in one cycle for smoother combustion.

4. Improved Fuel Efficiency:
   ➔ Better combustion = less fuel consumption.

5. Lower Emissions:
   ➔ Reduces harmful gases like NOx, CO, and unburned hydrocarbons.

6. Better Engine Performance:
   ➔ More power, quicker response, and smoother running.

7. Less Noise (Lower Engine Knock):
   ➔ Controlled fuel injection makes the engine quieter compared to older diesel engines.

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