Mercedes SLS Electric Drive hooned on a track.

[Thirdgen89GTA]

750hp, 4 motors, complete independent drive for each wheel and crazy torque vectoring for Yaw Control

[YOUTUBE]IElqf-FCMs8&feature[/YOUTUBE]

[WheelMan]

This is very cool IMO


-Travis

[Arct1k]

Wish the price tag was better and they could squeeze in a small Diesel engine to charge the bats but vvv nice v

[BrianG]

Originally Posted by Arct1k

... and they could squeeze in a small Diesel engine to charge the bats ...

Or better yet, a turbine engine for efficiency.

[Thirdgen89GTA]

Originally Posted by BrianG

Or better yet, a turbine engine for efficiency.

Turbine probably wouldn't pass noise/heat emission standards.

[hashemio]

He gets a little too excited at 9:48 lol

[Thirdgen89GTA]

Originally Posted by hashemio

He gets a little too excited at 9:48 lol

Thats okay, he's one of the few car journalists I enjoy listening too.

[BrianG]

Originally Posted by Thirdgen89GTA

Turbine probably wouldn't pass noise/heat emission standards.

I don't see why not. Muffle the exhaust for the noise issue just like a normal engine. Heat emissions could be an issue, but nothing that some clever engineering couldn't mitigate. Besides, a turbine sized properly for approx 30-50kw output - just large enough to cover average power draw - wouldn't be too bad. After all, we aren't talking about an engine from a Boeing 7x7...

[zeropointbug]

Turbine generator for sure, you can have a 50kW gen for less than 100lbs, and the heat/noise is a NON issue.

[mistercrash]

I like the Hotwheels blue chrome color. Some of the features of this car are pretty cool, like the ''negative torque'' which actually helps the car turn with less steering input. But it still is just another really cool car that is out of reach for most of us, Henry Ford gave us the Model T that most everyone could afford, well we need a Henry Ford of the twenty first century to give us the E-Model T.
The best option we have now is a frikkin' Nissan Versa that is electric and costs 40 grand.

[zeropointbug]

The negative torque is just another way of saying selective regenerative braking.

[mistercrash]

The guy didn't go into a lot of explanation on it but it sound to me like it's more than just regenerative braking, it sounds like it's constantly monitored and adjusted on the fly to help stabilize the car.

[BrianG]

Originally Posted by mistercrash

The guy didn't go into a lot of explanation on it but it sound to me like it's more than just regenerative braking, it sounds like it's constantly monitored and adjusted on the fly to help stabilize the car.

I agree. Regen braking is simply shorting the motor coils in a controlled manner via PWM, while this negative torque scheme sounds more like "reverse power" is being applied for more aggressive action - just a little though, not enough to actually spin the tires backwards.

[Arct1k]

I'd assume that it is using regen braking vs a Holmes hold style approach. They mention drag brake in the video.

Still some interesting tech.

[mistercrash]

Tech dating back to the late 80s early 90s as far as using negative torque to help the car turn. Pierre Couture from Quebec, Canada had a great project going on with Hydro Quebec with a prototype using in wheel, air cooled motors he developed, he and his team also had some tech about batteries and a tiny generator making a crap load of power. The prototype made with a Chrysler Intrepid had 4 in wheel motors, a large battery and a small generator running with a small gas motor. Recognize the Chevy Volt anyone? All was lost , buried, sold or stolen by other companies due in part to poorly managed patents, but mostly because of other business or political BS. Couture said in those times that the whole power steering mechanism of ICE cars would not be needed because the in wheel electric motors could be used to help steer the car.
one motor per wheel, 95 hp per motor with 1200 Nm of torque per motor. With that much torque, the motors could also be used to brake the car. Powerful as huge disk brakes and precise as the most advanced ABS. Regen braking of course. The project and prototype were just awesome.

http://www.youtube.com/watch?v=jHmxJ...utu.be&t=7m09s

Sorry for the French language in the video.