excelerator pump

[xxalexx at ix.netcom.com]

> From:          "Sanity Challenged" <expert_not at hotmail.com>
> To:            diy_efi at efi332.eng.ohio-state.edu
> Subject:       Re: excelerator pump
> Date:          Wed, 24 Jun 1998 09:33:59 PDT
> Reply-to:      diy_efi at efi332.eng.ohio-state.edu

I did make one in short notice about 1 hr. for a  GM propane vortech 
I injected (single shot in manifold)  at a  rate over 0.2 volts/sec.
for duration of 1-3 sec. There was a lot of noise from TPS and I did 
not have a filter on the PIC A/D.  
alex
> This is the type of simple thing a PIC excells at.  A number of 
> inexpensive PICS include comparators.  Depending on what you action you 
> want, you could simply loop looking at the input from the pot, compare 
> it to a previous input from the pot, and if the sign and number was 
> right - set a discrete output that could be used by another device. The 
> physical advantage is that a simple PIC with UVEPROM can be reprogamed 
> whereas a collection of parts is more difficult. Remember that PICs are 
> imbedded into even your $29 Pep Boys battery charger.
> 
> >From: "Martin Hill" <EAXMJHI at ean2.mecheng.nottingham.ac.uk>
> >To: diy_efi at efi332.eng.ohio-state.edu
> >Date:          Wed, 24 Jun 1998 16:24:28 GMT0BST
> >Subject:       Re: excelerator pump
> >Reply-To: diy_efi at efi332.eng.ohio-state.edu
> >
> >You could set up an op-amp as a differentiator and then send the 
> >output to a comparator with the other comparator input coming from a 
> >pot to select the point at which it comes active.
> >
> >Martin
> >
> >> can someone come up with a circuit that will take the output from the
> >> throttle position sensor (0-5v), and sense when it has been suddenly 
> opened?
> >> 
> >> ie. if you open the throttle suddenly the output goes high...
> >> 
> >> to simulate the excelerator pump on a carb engine.
> >> 
> >> Matthew Harding
> >> ---------------
> >> 
> >> reply to any of these....
> >> 
> >> mharding at qonline.com.au
> >> bernie at ronscomputers.com.au
> >> bernie at browse-cafe.com.au
> >> 
> >
> 
> 
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