249 MPH without a Transmission System....

Are you kidding us?
Yes that would be our answer when someone will say that a car can run without what we consider its lifeline “The Transmission System”.
And that is what Koenigsegg Regera has done which is a supercar and that is all the more astounding. But how did they do it and are there other ways.
We will try to answer the questions today. Firstly, how the Regera does it. The Koenigsegg’s answer is “Direct Drive”.

The whole transmission system is replaced by three electric motors. A mechanical transmission is simply not needed. Instead, the 1100-hp, twin-turbocharged, 5.0-liter Koenigsegg V8 which produces more power on E85 Ethanol fuel sends power directly to three electric motors, one attached to the front of the crankshaft and providing power to both the battery and to the rear motors—one for each of the rear wheels. The battery is a 9.27 kWh lithium-polymer type, weighing 253 lbs. and located in the central chassis tunnel. When the electric motors are factored in, the total system output is a claimed 1500 hp at the crank and 1475 lb-ft (2000 Nm) of torque. The electric motor on the crankshaft makes 215 horsepower (and also acts as a starter motor/generator) while the electric motors on the rear wheels make 241 horsepower each. This also allows for torque vectoring between the rear wheels. Real torque vectoring, not brake actuated.

It's also a plug-in hybrid with an interesting feature called "Battery Drain Mode." When the Regera is around 50 km from its destination or a charge point, a button will trigger BDM. Taking into account the driver's behaviour, it will attempt to fully drain the battery to allow for a full charge at the destination, which minimizes CO2 emissions in anticipation of a plug-in station. 
It is said to be the fastest accelerating production car ever. The Regera can get to its top speed of 249 MPH in less than 20 seconds. To compare, it takes a Porsche 918, another hybrid supercar, 23 seconds to reach 186 MPH. It goes from 93 MPH to 155 MPH in 3.2 seconds. Acceleration from 0 to 60 is the easy sort of acceleration (it does it in 2.8 seconds, which is fast), as you go faster,aero resistance makes acceleration harder.
Exactly how it works? https://i.kinja-img.com/gawker-media/image/upload/ii0m5xc5nwo8zk2pe8ry.jpg
Instead of transmitting power through a transmission like a CVT or a dual clutch, the KDD uses one ratio in order to achieve its performance goals. The advantage is that the normal losses from powering a transmission with multiple ratios are cut in half. The weight of that transmission is also cut out of the car, meaning there isn't a weight compromise for the hybrid system.
At speeds less than 30 MPH, the Regera will run on electric power alone. At speeds above 30 MPH, the internal combustion engine comes into play thanks to a hydraulic coupling that acts like a clutch, but only slips a tiny bit. Most of the time it is locked. This sounds similar in concept to a “Torque Converter”.
When you keep accelerating, the engine is locked into the geared rear-end and works with the electric power to accelerate to the Regera's 8,250 RPM redline, at which point it's doing 249 MPH.
The electric motors work in conjunction with the engine to provide torque fill, torque vectoring, and help provide power in the gaps where the engine might long for a gear. In theory, the electric
motors have replaced the gearbox.
Under heavy acceleration, the Regera will use all 670 horsepower of the electric motors in conjunction with the at least 800 horsepower of the engine. Under heavy braking or when the engine is acting as a generator, the Regera can take up to 200 horsepower to use for regeneration.
To know what is a Torque Convertor and how it works stay tuned to our blog.
And for those mathematical nerds out there check out how the Regera works mathematically.

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