3 ms·

I believe hybrid Volvo XC90 starting with 2020 has it https://thebrakereport.com/volvo-using-kers-on-production-cars-in-2020/ https://thebrakereport.com/volvo-u

• byhemechi 4y ago
  that's just electrical regen braking
  • tguvot 4y ago
    they always had regen braking. this is different: " Volvo’s KERS setup is based around a carbon fibre flywheel that spins at up to 60,000 rpm. Braking spins the flywheel up, and accelerating takes advantage of its momentum by supplying drive to the rear wheels."
    • perryizgr8 4y ago
      Why would they make the flywheel out of carbon fiber? Isn't carbon fiber supposed to be very lightweight? In a flywheel you would want a massive wheel.
      • tguvot 4y ago
        my guess that it's easier to spin-up during braking and it's less weight to carry during driving. I guess they went through a bunch of materials before they figure out price/performance/efficiency sweet point. Flywheel even enclosed in vacuum to minimize friction...