Originally Posted by visitador
I am a bit confused here. Just out of curiousity, is the North American version of the diesel slightly different than those for export? I read some technical information saying that Jeep doubled the pressure for the common rail. Is that for all markets?
I don't know much about these diesels but I know that they are made by VM Motori. I don't know how much of the engine is controlled by a computer. I don't know how much tuning happens electronically. I don't know the range of control Jeep / Chrysler though programming has on the combustion. I also don't know how much of the operation of the engine has to change in the U.S.A. I am curious about these things. But, I won't be anymore the moment I order a HEMI®.
In Common Rail Diesel engines, the fuel pressure in a distribution rail is between 15,000 psi and 29,000 psi the later the Generation of Diesel Engine the Higher the pressure.
This is from Motor Trend:
Until your post I had not remembered reading this. According to this, if it is correct, the engine for North America will be different than the ones used in other markets. If the engine operates at a different rail pressure in North America than in Europe or Australia than I would say that was significant.
To me the statement Motor Trend has made would suggest this. That doesn't mean the statement is unintentionally misleading.
Update: After reading elsewhere the statement appears at least partly false:
The Specs for the VM Motori 630T have the Rail Pressure at up to 29,000 psi the Turbo Charger is also Water cooled across the board. So it would be accurate to say that For North American Duty the engine has the same maximum Rail Pressure. The Part about the water cooling is definitely false. However, based upon a schematic of a Common Rail Fuel injection system it might be possible to adjust the pressure electronically. The ECU("Engine control unit") shows an electrical connection to the pressure limiter in the generic diagram I looked at on Wikipedia. File:Common Rail Scheme.svg - Wikipedia, the free encyclopedia
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