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Old Dec 11, 2014, 01:12 AM
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VWs Electric SuperCharger...

Someone should have filed for a patent?

http://www.autoevolution.com/news/vo...dsg-88759.html

Quote:
The extra power was achieved by Volkswagen though implementation of a new electric supercharger, which reduces lag to a minimum. Engineers have also installed a new variable valve timing system and a Piezo common rail injection system working at pressures of up to 2,500 bar.
272hp \ 505lb tq out of 4 cylinder production engine...

I lurk this forum cause someone is always on to something... just not enough time or money to make it happen
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Old Dec 12, 2014, 05:16 PM
Aka: Tom Jenkins
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What I just read up in the follow up was the electric motor only assists in the lower rpm band by helping the exhaust spool up the turbo rotor a tad faster to reduce the lag while the high rpm power band is fully exhaust driven turbo
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Old Dec 12, 2014, 06:35 PM
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Originally Posted by ApexAero View Post
What I just read up in the follow up was the electric motor only assists in the lower rpm band by helping the exhaust spool up the turbo rotor a tad faster to reduce the lag while the high rpm power band is fully exhaust driven turbo
Ah, new there was a caveat... those turbos can spool up to 140k rpms etc
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Old Dec 20, 2014, 09:54 PM
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Supercharger not turbo. My VW Corrado had a supercharger which was directly connected to the drive shaft. ie no turbo = no turbo lag.
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Old Dec 21, 2014, 01:52 AM
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Supercharger not turbo. My VW Corrado had a supercharger which was directly connected to the drive shaft. ie no turbo = no turbo lag.
Superchargers are better than turbos. No lag as you say, and also work over the entire rpm range (turbox don't get enough exhaust pressure to drive them at low rpm). But they are MUCH more expensive. And every single dollar counts when you are making hundreds of thousands of cars.

Because of their working at all rpm they are well suited to cars with auto gearboxes, which most cars seem to have nowadays.

Many of the small Mercedes (C - class) have got them as standard. I've got a supercharged and auto Mercedes 2.3 litre station wagon. It's much livelier than the unsupercharged 3.2 litre version. And you get a nice whistle at high rpm too. Does 140 mph, even with the toy planes in the back, which is good enough for me

I don't really see the point of what this thing is doing. It's got an electric supercharger for low rpm and a turbo for high. (I suppose the electric power makes it easier to 'disconnect' the supercharger when the turbo comes in). And at high rpm the turbo doesn't load the engine as much as a supercharger does, so is SLIGHTLY more efficient, but only at high rpm.

But it seems an awfully complicated way to get a probably tiny improvement in top speed (easy to obtain anyway, without all this complication) and fuel consumption/pollution.
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Old Dec 21, 2014, 08:55 PM
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The electric superchargers intended for cars are not there to increase the total power but to reduce turbo lag or in other words to assist in the area where an exhaust driven turbine generates little power.

The Full Electric/Electric Turbocharger the system is still more complex in that not only does the electric motor drive the compressor at low engine revs but at the point where the turbine starts to provide more power than the compressor requires the motor acts as a generator to absorb the excess rather than simply dumping the unwanted exhaust gas through the waste gate, which is what happens now.
The result ( in theory ) is no turbo lag and an improvement in the overall fuel efficiency.

It is almost like the Wright R-3350 Turbo Compound engines where in cruising flight the excess exhaust gas was directed to turbines directly connected to the crankshaft.
It resulted in the lowest fuel consumption per hp ever achieved by a piston aero engine in commercial service.
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Old Dec 21, 2014, 09:03 PM
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Formula 1

And they say there is no trickle down affect with Formula 1!
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Old Dec 22, 2014, 08:23 AM
Aka: Tom Jenkins
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While on the subject, sorta
Wonder who supplies the ducted fans used on NASCAR brake rotor cooling fans and ductwork needs?
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Old Dec 22, 2014, 12:00 PM
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Steele Design LLC provides the ducted fans for NASCAR. You may recognize the last name of the owner, Andrew Wagoner. Andy is the son of Robert, of EJF fame. They are currently operating out of the EJF office/workshop and when that lease is up will move to a better business location. Robert plays with the ECU software and motors. Real slick stuff.

Bob
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Old Dec 22, 2014, 12:31 PM
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Steele Design LLC provides the ducted fans for NASCAR. You may recognize the last name of the owner, Andrew Wagoner. Andy is the son of Robert, of EJF fame. They are currently operating out of the EJF office/workshop and when that lease is up will move to a better business location. Robert plays with the ECU software and motors. Real slick stuff.

Bob
nice
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Old Dec 23, 2014, 02:51 AM
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Originally Posted by Quorneng View Post
It is almost like the Wright R-3350 Turbo Compound engines where in cruising flight the excess exhaust gas was directed to turbines directly connected to the crankshaft.
It resulted in the lowest fuel consumption per hp ever achieved by a piston aero engine in commercial service.
Those things were incredible. So complicated it's amazing that they lasted long enough to cross the Atlantic even once. Yet they did it routinely hundreds of times.

I looked at a sectioned version of the British equivalent (made by Napier as I remember) in our Science Museum. They just HAD to invent gas turbines - there simply wasn't enough room to get any more nuts and bolts inside the turbo-compound engines
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Old Dec 23, 2014, 10:06 AM
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If they really want to eliminate "lag" they should hook the electric motors directly to the wheels and scrap the engine altogether.
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Old Dec 23, 2014, 03:12 PM
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If they really want to eliminate "lag" they should hook the electric motors directly to the wheels and scrap the engine altogether.
But then you can't go far and can't respond to the Commanding Officers' sudden whim to do some reconnaissance at a new clothes shop she has heard of somewhere a little further along. Because you couldn't then get back to base. Therefore totally useless, as everyone except fake greenies with more money than sense already know.

(It's still got an 'engine', but causing pollution in someone else's neighborhood. So he gets polluted and you can't go as far as you might want. Doesn't make a whole lot of sense to me for either of you . With the abysmal sales, you don't think this 'chain of charging stations' is ever going to get built, do you? And they would only fix one of the two problems if they were.)
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Last edited by Mark Powell; Dec 23, 2014 at 03:28 PM.
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Old Dec 23, 2014, 06:43 PM
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Mark don't make this too complicated. If you need range just hook up a trailer with a generator and large gas tank and an extension cord and you can drive around like anyone else :
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