Pump Pressure

Wayne.MacDonald at zurich.com.au Wayne.MacDonald at zurich.com.au
Fri Jun 19 05:58:39 GMT 1998


>If I'm reading between the lines correctly, I think what
>you need is a larger capacity injector. Take a look at this
>page

No, What I am actually after is a way to better match the pulse length to
the intake cycle whilst still putting enough fuel in. The project I am
working on is a motorcycle engine that revs to 10,500, that only gives 6ms
per rev and even less when the inlet is open. If we use a high flow
injector to drop the pulse length required near redline this would shorten
the pulse length at low revs to the point that it would be hard to get
consistent fuel metering. My idea was to drive the injector for a longer
period with a lower pressure at low revs and ramp up the pump pressure
whilst shortening the pulse length at higher revs. Is this a stupid idea?,
Is it a waste of time?, If not where do I get a variable pressure fuel pump
that I can control from my computer. Or would it be better to install a
second set of (high-flow) injectors above the butterflies and ramp from the
lower (standard) injectors to the higher flow second set as the revs
increase?.

     Wayne.





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