What is a CRDI Engine

8/3/2019 What is a CRDI Engine

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BY:BY:

ALOK MANI TRIPATHIALOK MANI TRIPATHI

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CRDICRDI


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What Is A CRDI?

The letters CRDI stands for Common Rail Direct Fuel

Injection.

It is a fuel injector working on common rail design,

thats injects fuel in Petrol as well as in Diesel

engines.
http://en.wikipedia.org/wiki/File:Bosch_common_rail_injector.JPGhttp://en.wikipedia.org/wiki/File:Bosch_common_rail_injector.JPG


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History of CRDIHistory

of CRDIIt was developed in the late 1960s by Robert Huber.

In Swiss Federal Institute Of Technology Switzerland.

Its first successful vehicle began in Japan by the mid-

1990s by a Japanese automotive parts manufacturer.

The concept of direct-injection is older concept now

the common-rail design is quite a step forward.

In1997 it comes in use for first passenger car AlfaRomeo and later on that same year Mercedes-Benz C

220 CDI.


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Common Tube Or RailCommon Tube Or RailFuel in the common tube or rail is under a set

amount of pressure.Which causes the fuel to be atomized or broken

down to its smallest particles.

This allows the fuel to combine with the air much

more efficiently.

With proper direct injection, fuel use is highly

efficient, with much less waste fuel escaping the

system unused.


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HOW DOES C.R.D.I WORKS?

The CRDI engine is designed with a common rail for

supplying equal amount of fuel to all cylinders at a

desired pressure using a pressure regulator attached to it.

The pressure regulator, controls the pressure of the air

supplied into the cylinders thorough the inlet valve.

These valves are Solenoid or Piezoelectric valves that

electronically control the fuel injection time and

quantity and the higher pressure that provides better fuel

atomization.


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ECU(electronic control unit), it is a electronic device

that allow to inject a small amount of diesel just

before the main injection event (Pilot Injection) by

using sensors.

This reduces the explosiveness and vibration.

Common rail engines require very short (< 1 s) or no

heating up time at all and produce lower engine noise

and emissions than older systems.


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http://en.wikipedia.org/wiki/File:Common_Rail_Scheme.svg


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FEATURES OF CRDIFEATURES OF CRDIOn diesel engines, it gives a high-pressure (over 1,000

bar/15,000 psi) fuel rail feeding individual solenoid

valves, as opposed to low-pressure fuel pump feeding

unit injectors.

Third-generation common rail diesels now feature

piezoelectric injectors for increased precision, with fuel

pressures up to 1,800 bar/26,000 psi.

In gasoline engines, it is used in gasoline direct injection

engine technology.


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ADVANTAGESADVANTAGESFor diesel vehicles CRDI helps to improve the performance by a

much as 25 percent.

It provides more power and makes the technology more attractiv

for passenger vehicles.

Engines with CRDI run much more smoothly, with efficienc

greatly enhanced by higher pressure possible in the common

rail.

CRDI method greatly reduces engine and vehicle vibration.

Gives better fuel economy.

Reduces the cost of operation significantly.


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DISADVANTAGESDISADVANTAGES

CRDI engine is a little more expensive than older

technologies.

vBut the savings in fuel cost can help recoup the initial

expensive over time.


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THANK YOU

What is a CRDI Engine

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