DFI, Batch Fire, and other myths

[Gary Derian]

Recent research on fuel droplet sizes has shown that injecting fuel onto a
closed intake valve, then letting a shot of exhaust hit it when the valve
opens (reversion) produces better and smaller droplets than the injector
itself can generate.  See the SAE Journal from a month or two ago.

With this info, SFI could be used to insure that all the fuel is injected
while the valve is closed, not open.  How are the SFI systems actually
timed?

Gary Derian <gderian at cybergate.net>