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...
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NewsW wrote:
There is a pressure relieve valve that bleeds off high pressure fuel once operating pressure is reached in the fuel system.
So no, not the entire energy load at maximum is being bled into tank, but there is certainly transfer of energy to fuel.
Another source of transfer is the heat in the engine compartment, and also via the mounting of the pump to engine.
IIRC, there was a patent that address the thermal transfer issue from engine / pump mounting.
Clearly, management of thermal loads for the pump and not overheating fuel is a major consideration in pump design.
It may also explain, thermal load, why Bosch went with an all aluminum design, including for the bore, instead of cast iron like on a CP3.
