[Diy_efi] CIS EFI via Fuel Pump PWM

[Mike]

I suppose the dynamic range would be an issue,

ie. If no (minimal) PWM of injectors then you could reach a point at low
load theat the pressure is just too low so fuel wouldn't spray just
dribble. But I suppose the minimum PWM for injectors would be set
appropriately for span over load range etc etc

Also what about all the rubber hose interconnects, wouldn't that affect
time for pump up/down - need a modulated pressure regulator as well
as pump control - could be an interesting way to improve flow where
the factory injectors are maxed out when modding an engine etc,

rgds

mike

At 09:10 AM 5/8/2002 -0500, you wrote:
>Bernd Felsche wrote:
>> 
>> ARKK tapped away at the keyboard with:
>> > The idea was that CIS injectors could adequately be controlled via
>> > fuel pump modulation for pressure control.
>> 
>> Unlikely to be successful unless the pump is quite close to the
>> injector. System delays will be the source of control problems;
>> it'll take a while for the pressure to build up over a couple of
>> metres of fuel line.
>
>Why would it take any significant time?  The fuel isn't compressible,
>and steel fuel lines don't stretch.
>
>--steve
>
>-- 
>Steve Ravet
>steve.ravet at arm.com
>ARM,Inc.
>www.arm.com
>
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