[Diy_efi] new EFI controller

[Mike]

At 04:49 PM 3/11/03 +1300, you wrote:
>All the energy that you put into the windings to establish the magnetic
>field is available when you stop the current flow and hence destroy the
>magnetic field.  This is where the energy comes from for the large voltage
>spikes that occur when you shut off the current.  Energy is expended in
>maintaining the current flow (I^2*R losses) as well as moving the pintle a
>very small distance (F*d).  However as previously stated, the energy put
>into establishing the magnetic field is available again (with only minor
>losses), and this would then be perfect for quickly opening the injector on
>the next cycle.

50% losses would be more likely, theres the spring, friction of the
spring, pintle, pressure pulse back through fuel rail.

i really wouldnt expect ay more than 50% electrical back from
the coil, some reasonable flyback designs are only 70% efficient
to start with :(


Rgds

Mike Massen
Mb +61 (0) 438 048961
Perth, Western Australia
Some power/auto stuff here:-  http://www.iinet.net.au/~erazmus
Some auto stuff http://members.iinet.net.au/~erazmus/car_accessories/



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