On this fine-gasoline-spray talk . . . like ALL things, there are diminishing returns; with down-side affects.
The extreme fuel-use efficiency is full pre-vaprozation. Extremely tweeky for temperatures and engine load changes! Very,very prevalent to go-boom back up into the intake system. Vaporized gasoline is evil wicked.
The GEET system was not full vaporization. Sonic particle-i-zation. Poor full load power. Poor load change response. Tweeky.
Float bowl carburetors were capable of excellent power and steady state fuel use economies. Warming up to stabilization problems and still cold emissions. Needed expensive added on system for traveling altitude changes. Needed added on sitting hot vaporizing off blocking/capturing systems.
Throttle body fuel injection with electronic controls solved most of these.
PORT/individual runner in-the-intake injectors allowed for faster cold stable idles and emissions. But with the engine fuel delivery now split up four, six, eight ways the finer injectors nozzles would clog up sooner versus later. Needed higher refined levels of gasoline’s. Finer/more restrictive on-board filters requiring more powerful electric fuel pumps. Still. 4-5 years; 40-60k miles and the injector tips would buildups spray poorly. So the additional additives to gasoline to “fight” injector deposits.
It was determined to be the gasoline fuel components were degrade-changing being recycled again and again past the warm-hot on engine fuel line pressure orifice slit. So. On to the one-line returnless systems. The fuel pressure regulators moved out of hot engine compartment into/onto the in-tank fuel pump/suction sock assembly.
Then onto GDI. Gasoline directly injected into the combustion chamber. Similar to a diesel. Tiny bit better power. Tiny bit better fuel use economy. Seemed it would be even better emissions capable.
Again big consequence problems encounter in world-wide service conditions. You can search these out yourselves.
The smart engine system designers have reverted to Port injection for under best-use conditions with GDI as best-use part time. Expense and complicated dual systems then.
Third world gasoline’s, DIY liquid mixed substitutes, you really want a large orifice carburetor mixer system. An old dumb mostly mechanical CSI Bosch/Denso system.
From there UP in idealizing you will have driven needs for better and better Tiered Spec grade fuels.
And these are not just net-looked-up opinions. The hard learned opinions of hard working keep-it -running field-mechanics and field-technicians.
If you insist getting an angel to sit on the head of a pin . . . one angel; and he can be big, dumb, fat and a bit happy-raucous.
The more angels crammed on: and then they Must be much smaller, uniform-bland, close-quarters friendly, and extremely complaint.
tree-farmer Steve unruh