[Diy_efi] CIS EFI via Fuel Pump PWM

[Bernd Felsche]

steve ravet tapped away at the keyboard with:
> I missed something also.  Was the intent to PWM the pump at a high
> frequency to get a variable fuel pressure, or to use the pump to
> actually create pulses of fuel?

The former.

One thing I didn't mention before is that the pump needs to have a
dynamic range covering all the fueling requirements of the engine;
that's around 100:1.

Probably far simpler to use a (large) PWM fuel "injector" on a
return line to regulate the pressure to CIS injectors. Some sort of
pressure damper downstream, before the CIS injectors is advisable.

-- 
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