Twin injector system?

[Sandy]

This is the general idea behind the peak and hold injectors, but taked to
more of an extreem. 

Sandy

At 11:23 AM 7/2/98 -0700, you wrote:
>Sandy wrote:
>>I have though of just raising the voltage too, but would expect a couple of
>>problem, meltdown and destruction of the injector as one ;-). The second,
>>is that it might open faster, but not close faster, also I have now to dump
>>a lot more stored energy back into the electronics so that may require some
>>changes in the protection and related circutry.  I don't really know the
>>insides of the injector, if the fuel pressure is used to help close the
>>pintle (I think thats what its called), then a combination of increased
>>fuel pressure and higher peak voltage might do the trick. An interesting
>>thought, would be to take a 24 vdc powersource, and run an injector
>>(saturated style) with a 2/1 peak and hold current and see what kind of
>>minimum cycle time you can get, and then raise the pressure. I would expect
>>that this is all a wash, as with the added pressure the pintle will just
>>stick open, worth a ramble however.
>
>I don't think meltdown would be a problem, since power dissipation is a 
>function of the coil current, not coil voltage. The idea is to drive the
coil 
>hard using the high voltage to ramp the current up quickly, then cut it
back to 
>a lower current, just as a peak and hold driver does. The end current is the 
>same as using 12V, it just gets there quicker.
>The extra voltage will put some stress on the coil insulation, but no more
than 
>what happens when the coil closes.
>The stored energy will be the same, because the coil current at the end of
the 
>cycle will be the same as with a 12V system. Garfield said that injectors
kick 
>back like a mutha. All this idea does is to kick the muthas hard first. :-)
>
>Stuart.
>
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