James
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| posted on 5/4/04 at 04:27 PM |
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Electric Motor Blower
Was just wondering if electric motor powered 'chargers exist and if not- why not?
My suspicion is that they may take as long to spin up as a turbo but without the benefit of being powered 'for free' as it were from
exhaust gases.
Thoughts?
Cheers,
James
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MikeR
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| posted on 5/4/04 at 04:55 PM |
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I think the issue is getting enough force from the motor without drawing huge amounts of current.
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Alan B
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| posted on 5/4/04 at 05:17 PM |
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Yep...you would need such a big alternator to supply the current you may as well just drive the blower directly and save the coversion
inefficiencies...
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blueshift
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| posted on 5/4/04 at 10:02 PM |
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... and the weight of the big alternator and motor (just pulleys)
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Mark Allanson
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| posted on 5/4/04 at 10:21 PM |
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I thought an electric blower would be controllable by an ECU, but I suppose that a hydraulic clutch activated by a servo would be just as good if not
better
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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stephen_gusterson
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| posted on 5/4/04 at 10:45 PM |
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you can buy an electrec turbo called a turbozet
http://www.turbozet.com/
supposedly total crap
atb
steve
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JoelP
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| posted on 6/4/04 at 09:09 AM |
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so is an electric turbo better than an electric supercharger!!!!!
i know, there should be no difference.
would an electric turbo still have a turbine in the exhaust? hence would it be an antilag device? and would a leccy super use the motor to help turn
the crank too?!
Beware! Bourettes is binfectious.
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stephen_gusterson
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| posted on 6/4/04 at 09:17 AM |
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effectively the turbozet isnt a turbo, as its not exhaust driven.
It woukld melt as its plastic.
If you think about it, can you see a little lekky motor being able to compress air at a volume of approx 2 litres per 2x crank revs at 6,000 rpm to
approx 8 - 15 psi?
I cant.....
atb
steve
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GO
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| posted on 6/4/04 at 09:37 AM |
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We had a little thread on this subject before...
thready
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stephen_gusterson
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| posted on 6/4/04 at 12:38 PM |
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a whole 1psi!
I wonder if an engine driven fan (the one that would have cooled the rad normally) could be boxed in and used..... it could have a 'waste
gate' to divert any flow thats not needed, so its effectively always on, but bled away when not needed.
atb
steve
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carcentric
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| posted on 6/4/04 at 04:45 PM |
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An alternative boost source
There was a fellow on the Dodge Dakota forum who was experimenting with providing boost from the output end of a two-cycle leaf blower (if you have
such things over there).
If I remember correctly, it was constant speed producing constant pressure rather than variable according to load so it added a high-pitched
bagpipe-like drone to the vehicle engine's song.
Don't know if he ever finished it or if it remained in the prototype stage.
M D "Doc" Nugent
http://www.carcentric.com
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NS Dev
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| posted on 7/4/04 at 11:36 PM |
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Hmmmm, all this sounds decidedly smelly of something unpleasant!!
A typical supercharger on a typical 2.0 litre engine running at typical peak rpm will typically (like that word) draw about 15bhp from the engine that
it is feeding at typical (10 -12psi) boost levels, that's a heck of a big 12v dc motor!!!!
As an interesting aside, a top-fuel dragster at 8000rpm uses approximately 250-300 bhp to drive it's supercharger!! (mind you the engine in
making circa 7000bhp so it's not too bad!!)
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Mark Allanson
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| posted on 8/4/04 at 05:39 PM |
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Why cannot you use a turbo impellor to drive an alternator - no losses when your lights are on etc
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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gjn200
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| posted on 8/4/04 at 05:42 PM |
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It would cost to much,£600 ish for a turbo type thing for a couple of bhp.
<- Me!
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