One-pedal driving isn't necessarily the most efficient way of driving an EV.
has regen, for example. GM’s infamous EV1 used regenerative braking to improve range, which was controlled by what we now refer to as a “blended” brake pedal. When the driver stepped on the brake pedal in an EV1, the car blended both friction braking and motor regeneration with an extremely complex brake-by-wire system.There is a historical through-line from the EV1 to modern regen.
It was Toyota that brought regenerative braking to the masses with the original Prius, which also used a blended brake pedal. Most EVs use blended pedals to help charge the battery under braking.The Model S, and all subsequent cars from Tesla maker do things differently. Lift off the accelerator pedal and regenerative braking begins immediately; hit the brake pedal and you activate a traditional hydraulic circuit.
Tesla is unique among EV makers in employing this regen strategy. A lot of other EVs offer a one-pedal driving mode, or at least a very aggressive lift-off regen that can bring the car to a near stop, but most can also initiate regenerative braking with the brake pedal, though. This is where the question over one-pedal driving gets murky.
Porsche claims this is the most efficient way of doing things, so there’s no need for a one-pedal mode. It’s also more natural to how most people drive, especially when driving spiritedly. On track, it makes more sense to have a predictable, gradual deceleration when lifting off the right pedal, and to control all larger braking events with the brake pedal.
Folks at Polestar often use one-pedal around town as it’s efficient and convenient, but switch it off on the highway. With its newest EVs, the i4, iX, and i7 BMW offers an Adaptive regen program that uses camera and sensor data in concert with navigation data to constantly adjust the amount of regeneration you get with accelerator lift.
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