One-pedal driving: lift-off deceleration as a feature
Strong lift-off regen lets most driving be done, and most stops be completed, without touching the brake pedal.
- Explain one-pedal driving: lift-off deceleration as a feature at engineering level
- Read the numbers that define the behaviour
- Apply the idea to a real braking system
Overview
One-pedal driving increases regen torque applied the instant the driver lifts off the accelerator, strong enough to bring the car to a complete, controlled stop without the brake pedal in most situations. It is a calibration choice, not a hardware difference from ordinary regen.
In depth
Lift-off energy recovery
Lift off the accelerator and watch kinetic energy flow back to the battery as the motor decelerates the car.
Peak recovery: the inverter rectifies motor AC back into DC and charges the pack.
What actually changes versus light regen
The hardware is identical to a car with gentle lift-off regen — the same motor, inverter and battery. What changes is the torque map: lifting fully off the accelerator commands a much larger negative torque, often enough to produce 0.15–0.3 g of deceleration, which is roughly what a gentle brake pedal press would produce in a conventional car.
Most EVs let the driver choose the strength of lift-off regen, from near-coasting to full one-pedal stops, because driver preference on this varies enormously.
Key takeaways
- One-pedal driving is a torque-map calibration choice, not different hardware.
- Full one-pedal mode can bring the car to a complete stop using regen alone.
- Most EVs let drivers select how aggressive lift-off regen should be.
Confirm you've read through and we'll count it toward your progress.