the ones i have seen have the IC connected to the drive train as per normal
with the electric motor connected in line with the drive shaft. So you could
run with the electric motor totally disconnected. Basically it seems the
electric motor/electric system acts as a "peak load" device IE when you put
your foot down over some level the electrics kick in and boost the power so
less fuel is needed and the engine can stay in a more efficent power zone.

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Peter L. Peres
Sent: Friday, April 09, 2004 9:28 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:] That's a lot of flashlights!


9Ah*300V = 2700Wh

with say 10 12V 30Ah batteries (very heavy): 3600Wh

For comparison an industrial fork lift truck will have something like
72V*96Ah = 6480Wh (~=8hp for an hour of continuous full power work -
actually stretched to 4-6 hours in normal duty).

I guess they use the electrical power to smooth loads so the IC engine
runs at constant power. One can drain ~100A from that battery which
provides at least 30hp for short time, maybe more. Short time means a few
minutes, less than 5. During this time the throttle of the IC engine would
stay frozen. I have read about earlier (70's) attempts to do this with
flywheels. The mechanical problems were terrible (the flywheel was coupled
into the geartrain using its own gearbox and an extra differential gear).
With so much lead time (5 minutes) a turbine could be interesting again.

Peter

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