[Vwdiesel] stuck stick in cylinder & Engine refresher: Thoughts?

[dieseltdi at verizon.net]

The pre chamber in the IDIs was to quiet the "knock" of the fuel detonation as VW didn't think people would drive a car that was as noisy as a standard diesel truck.  It allowed the flame front to begin small and then spread out into the main cylinder.  As far as pulsed injection, PD injectors can do multisprays depending upon what the computer tells it to do as there is always some residual pressure in the system.  Not like on the common rail systems but pressure none the less.  I think I remember that they can have 3 pulses of injection.  i will need to go back and look that one up to be sure.  Hayden
On Dec 13, 2011, at 1:41 PM, Tad wrote:

> I thought the prechamber was because the IDI pumps don't generate enough
> pressure to inject directly?
> 
> Rotary-pump TDIs don't really have multiple injection events, but they do
> have two-stage injectors that(as you mentioned) have a smaller "pilot"
> injection prior to the main injection event.
> 
> Newer CR engines with the piezoelectric injectors do true multiple
> injections... not sure about PD.
> 
> On Tue, Dec 13, 2011 at 8:14 AM, <LBaird119 at aol.com> wrote:
> 

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