[Diy_efi] Use 02 sensor on motorcycle?

[bcroe at juno.com]

As Brian says, (with 40 watts available) "I bet you could find 
a suitable regulator".  Feel free to investigate what sort of 
low dropout or switching solutions are out there.  But 
before we buy that cart, lets find out what power the horse
er, motorcycle, has available.  

Your first problem with no battery is that there are probably
dropout spikes between alternator output pulses.  So run 
the capacitor experiment (with and without lights on) to 
see what we have after bridging the spikes with energy 
reserve.  If you see 14 V lights on/off, we are home free.  If 
lower or a lot higher, we start working on the cart.  12V 
means we will need a different regulator than stock.  My
WB can work on 11.5 V without a switcher.

+ to + means the + output wire must be connected to the 
+ terminal on the 10,000 ufd cap; the - output wire (might 
be ground) must tie to the cap - terminal.

Bruce Roe

> > If you are ready to add components, let me suggest
> > another approach.  Are we talking a rectified but unregulated
> > output capable of providing around 40 watts at 14V to
> > headlight/tail light?
> 
> The service manual indicates a rectifier/regulator combined 
> into one unit.  The load is currently 40 watts on rectified/regulated 
> circuit.  The only interesting specification listed in service manual 
> is "AC regulator regulated voltage = 13.5-14.5V / 4500rpm".  I 
> would like to use this system at idle which, if I remember 
> was only about 12V.  Doesn't that nullify the following experiment ?
> 
> >  First check the polarity of the power
> > very carefully.  Put about a 10,000 ufd capacitor across
> > the power and see what kind of voltage you get with the
> > lights on.  Observe + to + carfully on the power to caps if
> > you don't want them to explode.  If you are getting 12-15
> > volts with the lights on, you should have plenty of power
> > for a DIY-WB with the lights off.  If the voltage goes up
> > quite a bit, you'll need a good WB heat sink, or maybe a
> > pre regulator, and don't leave the lights on long.  If you
> > can't find the caps, I have some around here.
> 
> If not, so I understand.  Determine polarity.  Put a 10k microfarad
> capacitor across power.  Measure voltage on this circuit with lights 
> on and
> capacitor in place ( any particular rpm/range )?  I don't understand 
> + to +
> ?
> 
> I appreciate your help Bruce.  I wish my understanding of 
> electricity was
> better.
> 
> Sven
> 
> 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://www.diy-efi.org/mailman/listinfo/diy_efi


_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi