Are Friction Brakes Redundant On Electrical Vehicles & Hybrids?
The Toyota Prius, the world's showtime mass-produced hybrid vehicle, went on sale inwards Nippon inwards 1997. eighteen years afterwards alongside sales surpassing 8 i M m vehicles, we're starting to larn a clear painting demonstrate of how durable vehicles powered past times electrical powertrains are.
The humble Prius has proved hence durable, alongside regular tidings of taxi operators surpassing 1 i M m km (the tape stands at 1.5M km), at that topographic point is fifty-fifty a thread on the priuschat website designated for Prius owners who induce got passed 299,999 miles (480,000 km).
Not merely are close Prius achieving these distances on the master copy battery pack (dispelling that urban myth) but inwards many cases they are every bit good nonetheless on the master copy manufacturing industrial plant life fitted gear upwardly of brake pads!! With a Prius able to work brake regeneration downward to 10 km/h, manufacture touchstone hydro-mechanical friction brakes motility from beingness a organization made upwardly of consumable parts to a durable organization that lasts the life of the vehicle.
Typical brake pad life expectancy on an ICE automobile is betwixt 50-100,000 km alongside brake rotors needing replacement every 100-200,000 km hence the increase inwards Prius brake life is inwards the portion of 10x.
If the relatively depression powered 50 kw electrical motor / generator inwards the Prius has made friction brakes 90% redundant, together with hence vehicles similar the BMW i3 alongside a much to a greater extent than powerful electrical motor (125 kw) together with aggressive speed variable brake regeneration capable of bringing the automobile to a consummate stop, brand friction brakes solely a legacy organization whose merely business office is to supply real depression duty-cycle security functions such every bit Anti-Lock Brakes (ABS) together with Electronic Stability Control (ESC).
Taxi operators running fleets of Nissan Leaf are every bit good reporting high mileage on master copy brake pads together with no incertitude given plenty fourth dimension volition every bit good transcend 500,000 km without a pad &/or rotor change. Leaf owners induce got the added practise goodness of non having an ICE to service (Prius ICE's reportedly eat excessive petroleum inwards a higher house 500,000 km) together with alongside typical electrical motor life measured inwards the 20-40,000 hr range, electrical merely powertrains could concluding inwards excess of ii i M m kilometres of problem gratis motoring, compared to a typical ICE automobile life expectancy of 320,000 km (200,000 miles).
The to a greater extent than that brake regeneration becomes an auto manufacture standard, the to a greater extent than inevitable the elimination of the dead weight together with costs associated alongside legacy friction brake systems seems. In monastic tell to let electromagnetic braking to functionally supplant all mandatory security systems similar ESC, each cycle requires an electrical motor to crusade / brake each cycle independently.
Technologies that nosotros accept for granted these days — similar stability command together with anti-lock brakes — paved the agency for computer-controlled cars, together with these long-established security technologies are mandated past times NHTSA etc. Automakers today agreed to brand automatic emergency braking (AEB) touchstone on close U.S. of A. cars post.
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