Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
Huntindog wrote:
snip....
Doesn't the injector time of firing vary by RPM? At higher RPM, I would think that some lead would be necessary. The computer can easily fire the injector at any point...But if the pump is mechanically connected to the crank, then the pumps pulses would not be able to stay in time with the injection events...
Thoughts?
It is so dependent on the hysteresis (rate or ramp of raise/fall)
of the injectors vs the piston stroke
Then to have advance, which if needed, would require some method of
varying the timing between the pump and the injector firing.
I saw no variability so far
Why I think they found/suspected some shock wave, hatched the current
method, but it is not tunable, nor variable....or they did find that
it only occurred in a range that the fixed timing solved for 'that'
range
This is indicative of the issue with us outsiders...we can only guess
at why of each finding. The insiders have more information and
discussion/design/review/proton-typing/etc
At this point, the more I read/find/discover/etc, the more I think
the Bosch engineers are lost and have been for a while. Extinguishing
one fire after another.
Possibly made worst by some level of personal change(s).
