Piezo Injectors

[Bruce1954]

[quoteHmmm,

I didn't see a fuel pump in the tank on my 03 6.0. I thought it was in the HFCM on the frame rail.

[/ QUOTE ]

I would think tha part will be about the same, with a dual filter set up.
Hope they will come up with a real drain lever like the 7.3 though [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Bruce

[lilredtruck]

Volkswagen has been selling a piezio injected diesel since 05. The common fuel rail has a relatively low fuel pressure, 40psi as I recall. The injector itself is what produces the high pressure at the injector pintle. The crystals are stacked, I recall something like 280 of them. When they are excited with voltage, they flex. This movement is used to compress fuel up 28,000 psi. The real benefit is that using a computer to vary the amplitude and duration of the voltage to the crystals, they can much more precisely control the injection process. Studying the Volkswagen (TDI), I also learned that the crystals react so quickly that the engineers say they could have as many as seven different injection pulses in the time frame of a single timing event.

[jdonoghue04]

[ QUOTE ]
Volkswagen has been selling a piezio injected diesel since 05. The common fuel rail has a relatively low fuel pressure, 40psi as I recall. The injector itself is what produces the high pressure at the injector pintle. The crystals are stacked, I recall something like 280 of them. When they are excited with voltage, they flex. This movement is used to compress fuel up 28,000 psi. The real benefit is that using a computer to vary the amplitude and duration of the voltage to the crystals, they can much more precisely control the injection process. Studying the Volkswagen (TDI), I also learned that the crystals react so quickly that the engineers say they could have as many as seven different injection pulses in the time frame of a single timing event.

[/ QUOTE ]
I like this idea better than the current HPCR methods - with the current technology, a stuck injector can ruin an engine very quickly. Perhaps this technology will solve that problem.

[Big K]

Piezo Injectors are very nice and I believe there is a couple of companies allready in progress building higher HP ones for the 6.4 [img]/ubbthreads/images/graemlins/smile.gif[/img]

Even though the 6.4 isn't out yet, the injectors that will be used in them have been known for a while [img]/ubbthreads/images/graemlins/wink.gif[/img]

[AllOutFirefighter13]

It's too bad there won't be a way to retro-fit the 6.4L injectors onto a 6.0L.

[thedieselkid]

I would imagine that dummy sensors could be made to get around all of the stuff that is not needed.

[AutoJim]

[ QUOTE ]
I would imagine that dummy sensors could be made to get around all of the stuff that is not needed.

[/ QUOTE ]

Hmm... like the cylinder heads, which are different, the HPOP (no longer needed, replaced by a HP fuel pump), and all the other stuff associated with an HEUI system that is either unnecessary or replaced by HPCR-specific stuff?

I think you'd be better served by swapping a complete 6.4L and associated wiring and anciliary devices into a 6L truck than trying to switch a 6L (or a 7.3L for that matter) from HEUI to HPCR.

When you have to make significant alterations to fundamental castings of the engine (the heads in this case), that's about where I'd draw the line.

You *might* be able to swap 6.4L heads onto a 6L block. I don't know for sure on that. But you'd still need the rest of the 6.4L systems and/or a full aftermarket ECU setup to make it all work right. I'm not sure if a FAST or MoTEC aftermarket ECU could be made to drive a diesel.

[allenf]

If you were to go to this amount of work, why not just go get a Cummins and drop it in? If I have a lot of problems with my 6.0L later on, it's perfect so far, this is what I am going to do. [img]/ubbthreads/images/graemlins/wink.gif[/img]

I think it is always a good idea to have an "plan B". [img]/ubbthreads/images/graemlins/smile.gif[/img]

[andrewbalser]

If I'm not mistaken, isn't it the HPOS on the 6.0L that wears the crankcase oil out so much quicker than the other diesels? If so, than there's a definate plus on the HPCR.

[Jmaccan]

"Volkswagen has been selling a piezio injected diesel since 05. The common fuel rail has a relatively low fuel pressure, 40psi as I recall. The injector itself is what produces the high pressure at the injector pintle. The crystals are stacked, I recall something like 280 of them. When they are excited with voltage, they flex. This movement is used to compress fuel up 28,000 psi. The real benefit is that using a computer to vary the amplitude and duration of the voltage to the crystals, they can much more precisely control the injection process. Studying the Volkswagen (TDI), I also learned that the crystals react so quickly that the engineers say they could have as many as seven different injection pulses in the time frame of a single timing event."


You may want to check your facts on this one, as TDIs switched to a PD (Pumpe-Duse) system (basically mechanical unit injection) on the 2004 TDI in the Jetta and Golf models (North America), and I believe in 2005 started using piezo-electric actuators to control start and end of injection cycles (just like the solenoids on ford 6.0L engines but 4 times as fast, less bulky and a lot less amperage draw), but its still a PD system, using a cam lobe to push the injector plunger down and pressurize the fuel, just like CAT uses on some of their engines (anything without an injection pump or HEUI system, and soon to be common rail system)and Detroit Diesel has used these for decades in their two stroke and four stroke engines.

[JimJoe]

VW will phase out PD; at least in Europe. Recently announced. Common rail turned out be be superior.

Jim

[Jmaccan]

[ QUOTE ]
VW will phase out PD; at least in Europe. Recently announced. Common rail turned out be be superior.

Jim

[/ QUOTE ]

But they still won't be using the piezo crystals to compress the fuel, just to control start and end of injection events.