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
Haven't had time to read the detailed links, yet
Also wondered about that patented cam follower alignment and if it is just spring
pressure, then of course yet another potential source of debris.
If me, I'd design in caster of some level, but that has some issues with what
am guessing the extremely high PSI's that dictated DLC
Cavitation anywhere in this HPFP's innards is a bad thing with some factors that
make it even worse.
I'll post my summary after this one, as think we need to crawl out of these
rat holes to take big picture look to see if we are off base. Plus always helpful
to see where we have been, re-address some of the rat holes in light of new
rat holes, to possibly come to new conclusions or back to the same ones with
a few new ones.
Also wondered about that patented cam follower alignment and if it is just spring
pressure, then of course yet another potential source of debris.
If me, I'd design in caster of some level, but that has some issues with what
am guessing the extremely high PSI's that dictated DLC
Cavitation anywhere in this HPFP's innards is a bad thing with some factors that
make it even worse.
- Micro bubbles and they are everywhere no matter
- If on the DLC, might there be some interaction with organic amines
- If DLC lifted, and a micro bubble explodes underneath, it will lift some DLC
- If on the surface of good DLC, would it become a weakness in the DLC
- If on softened/weakend DLC surface, would it further weaken to pit DLC
- Would a bubble on the bearing (is it needle...it must be) would it remove enough lube (fuel) to create a non-lubed spot in a very high PSI situation
- If there are unplated metal surfaces in there, would it dislodge an oxide particle to become debris that would then plow into to gouge DLC
- The pump shaft bearing and it's seal
- Is there a ditto for the shaft bearing going metal on metal when one of these bubbles explodes to remove lube
- Assume this is also a needle bearing
- Bearing seal and these bubble explosions, does it deform or blow out a bit
- There are shock loads when the cam lifts the follower/piston...since extreme PSI, is it up to the task
- Factor in cavitation and those bubble explosions, the metal on metal...does the needles and race pit and/or flake like most bearings over stressed do
- How many of these explosions would it take to do damage
- How does H2O factor in this brew
I'll post my summary after this one, as think we need to crawl out of these
rat holes to take big picture look to see if we are off base. Plus always helpful
to see where we have been, re-address some of the rat holes in light of new
rat holes, to possibly come to new conclusions or back to the same ones with
a few new ones.
