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CRDI Technology

CRDI Technology

Presently every other car maker making diesel cars in India is coming up with a CRDI engines. We admit that the technology is superior to IDI and fuel economy and performance is better. But experience with Hyundai Accent CRDI is making us cautious with CRDI engines. Almost all the Accents crdi's have to go through major engine overhauls after 50 K to 75K kms. Why the engine died so early ? Everybody blamed Hyundai for bad quality of engines but the real culprit is found to be the adulterated fuel available throughout. Infact the dirt in diesel acts as a cutting torch in the fuel delivery system of a CRDI engine. Injector replacment is the last thing we opt due to their high costs.Another problem is identified as non availbilty of Low sulpher Diesel which is most suitable for CRDI engines. All the Accents running in Delhi region have no problem with their engines coz LSD is available there.
Another factor which could affect the engine life of a CRDi is the frequency of Air filter replacement.
TATA Safari Dicor, Mahindra Scorpio CRDe, Ford Fiesta, Skoda Laura and some others have switched to CRDI technology. Are they sure that their engines would not meet the same fate ?
Gari.pk User 3433 asked on 06 Jul 2010 11:29:55 am
1 Answer
272 views |
Rayan - on 06 Jul 2010 11:30:08 am
CRDI engines have a parallel mechanism to the diesel pump which produces high pressures up to 1200-1600psi. Diesel Fuel goes through that pressure mechnism and finaly sprayed in the engine through injectors.

I might be wrong but as per my knowledge common rail refers to the single fuel injection line on the CRDI engine. Whereas conventional direct injection diesel engines must repeatedly generate fuel pressure for each injection, in CDI engines the pressure is built up independently of the injection sequence and pressure remains permanently available in the fuel line.


Now if deisel has dirt particles then that pressure mechnism should be the first thing to go bonkers rather then the engine (Piston, rings, con rods, crank etc) which i assume u r talking about coz word engine overhaul generaly means these parts of an engine.

I have some confusion here. can u clarify.

I think diesel pump and injectors should produce faults rather then the whole engine needing an overhaul
 

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