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Old 06-24-2016, 11:58 PM   #1 (permalink)
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Electric race car 0 to 62 mph in less than 2 seconds

I know this isn't exactly ecomodding, but it does show some of the great potential of electric drives.

Electric race car goes from 0 to 62 mph in less than 2 seconds, sets world record - eeDesignIt.com



In the second video some of the technical highlights are explained.
check out the soooooper light motors (shown at 4:30)
- 50 HP, 3.4 KG
- 200HP total with AWD with torque vectoring and traction control
- about 30% regen braking

Other cool stuff:
- controlled dampers with variable viscosity damping fluid
- adjustable downforce/drag aerodynamics

I'd love to see how that car does on some racetrack, and compare it to gas-powered car

- E*clipse

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Old 06-26-2016, 01:30 PM   #2 (permalink)
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I honestly don't see how it's possible. I'd think it'd just sit there burning rubber...
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Old 06-26-2016, 02:01 PM   #3 (permalink)
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?? super gooey tires and traction control ?? Somehow top-fuel dragsters manage even quicker times.

They also said there's enough aerodynamic downforce to drive on the ceiling. Sticky tires, huge downforce, and torque vectoring with traction control... The cornering that car must be able to do is insane.

I'd love to hear more about those motors. According to the 2nd video, they can spin up to about 19,000 rpm, and produce a flat torque curve to half that! Imagine that - a flat torque curve to just under 10,000 rpm! I wonder if the technology is open source since it's a university project.

One of those motors would be awesome on a motorcycle...
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Old 06-27-2016, 01:34 AM   #4 (permalink)
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Quote:
Originally Posted by e*clipse View Post
They also said there's enough aerodynamic downforce to drive on the ceiling. Sticky tires, huge downforce, and torque vectoring with traction control...
Not much aerodynamic downforce when you're starting from zero. Probably not a lot even at 60 mph. Likewise the traction control could, at best, keep all four tires burning at the same rate - or if it stops them from losing traction, limits the acceleration.
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Old 06-27-2016, 02:54 AM   #5 (permalink)
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I read about this project.
IIRC they found they could accelerate faster by carefully controlling the speed of the wheels to some precalculated rate rather than relying on traditional traction control, so they could operate on the limit all the time.
TC would take it slightly over the limit, then fall back behind to regain the correct speed.
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Old 06-27-2016, 01:08 PM   #6 (permalink)
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Is it 4 wheel drive, or rear wheel only?
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Old 06-27-2016, 01:08 PM   #7 (permalink)
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Even so, the tires have to be the limiting factor here. If you're just looking at electric motors, a railgun can accelerate a projectile from zero to mach 7 or so in a distance of a few dozen yards.
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Old 06-27-2016, 01:47 PM   #8 (permalink)
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Acceleration generates its own down force.
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Old 06-27-2016, 02:43 PM   #9 (permalink)
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Actually, I brought up the project because the sub 2 second 0-60 was one of many impressive accomplishments.

The AWD setup with individual control of the torque on every wheel allows significant cornering, braking, and accelleration advantages. This wasn't done just to go in a straight line fast.

If the car were made ONLY to accellerate from 0 to 60, my guess is it would look significantly different. Go ahead, make a rail gun and see if you impress anyone on that team.

I think the motors are a big deal because they can deliver 50hp with full torque up to almost 10krpm. They are light enough that a hub-motor is actually practical in that it doesn't destroy suspension performance with unsprung weight.

Personally, I'd love the opportunity to visit and ask open-minded questions.
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Old 06-27-2016, 10:45 PM   #10 (permalink)
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Quote:
Originally Posted by NeilBlanchard View Post
Acceleration generates its own down force.
On the REAR wheels, anyway.
That said, the only front-wheel-drive vehicles I've ever owned were pedal-powered tricycles.

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