I just zeroed in on one tiny bit of the whole thing...
Quote:
(4) By combining both methods in the light engine load range and using direct injection in the
medium engine load range, a uniform air-fuel mixture is achieved throughout the entire engine
revolution range, stabilizing combustion to improve fuel consumption and reduce emissions.
During high loads, port injection and direct injection are combined to ensure fuel flow volume.
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The 'to ensure fuel flow volume' bit.
I understand that it is different than the original 2GRFSE application, and am still curious if they are different injectors. If the 2GR's do flow more, (and are even compatible) it is the closest thing we may have to an upgrade for the direct injector if we want to keep a similar fueling strategy instead of just dumping tons more in via the 'normal' way.
I hadn't thought about the mechanical nature of the high-pressure pump though... It may not like the higher rpm of this motor compared to the 2GR? Or the mechanical in-efficiency at high rpm costs more in loses than a full DI fueling gains from better combustion?