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The Wrightspeed Circuit: taking luxury performance brands from 0 to 60 in under 3 seconds. Become part of the future of ACCELERATION: Switch to Wrightspeed.

 

The Wrightspeed Circuit has all wheel drive and all wheel control, making it the most advanced powertrain ever. With a 250 hp electric motor individually controlling each wheel, the Circuit sets a new standard for power and handling.

• Highest performance system available – more than 1,000 hp
  
• Integrated motor, 2-Speed Gear-Reduction, and Power Electronics Module
• Vehicle Dynamics Control, including stability, regenerative braking, and traction control
• Native All Wheel Drive System, with no differentials or right-angle drives

GTD (Geared Traction Drive)

Wrightspeed was able to make the fully integrated GTD by designing the inverter, 250 hp motor, and multi-speed transmission from the ground up, optimizing compatibility and system efficiency. This Silicon Valley "systems approach" has yielded an exceptionally high-power, compact, and lightweight system. Wrightspeed's Drivesystem is geared to optimize low-end torque, for hauling up hills, while preserving top highway cruising speeds.

WRIGHTSPEED DEMONSTRATES SOFTWARE CONTROLLED CLUTCH-LESS SHIFTING

Wrightspeed's Powertrains move the complexity from mechanical systems into electronic and software systems, making them lighter, cheaper, and more efficient. Clutchless gear shifting is a good example of this:

Traditional multi-speed transmissions use clutches (synchro rings, multi-disc wet clutches, twin-clutch arrangements) to achieve synchronization before engagement; this makes them, heavy, expensive, and less efficient. But with electric motors, it becomes possible to control the motor speed so precisely, and change it so quickly, that the shifter dog-clutches can be engaged without clashing. The sync function that used to be performed by mechanical means has been shifted into software control of electronics, driving the electric motor with precision. The system is therefore lighter, cheaper, and more efficient. Wrightspeed's control software weighs nothing, costs nothing to manufacture, doesn't wear out, and uses the electronics that are already present to drive the motor.

The Wrightspeed GTD is shown here, on a dynamometer, simulating acceleration from stop to first gear, shifting to second gear, back down to first gear and then a full torque stop. The shifting is too quiet to hear. The sound produced here is the motor accelerating and decelerating at maximum torque. The GTD jumps when the motor changes speed due to torque reaction  (torque reaction can be observed under the hood of a conventional car, when accelerated hard in neutral).

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