EVs emit more brake dust, which the EU is taking steps to control

Tailpipe emissions regulators continue to be the focus, but the next round of EU emissions standards will address pollution from another source – one that is particularly relevant to EVs.

Scheduled for unveiling in July, the upcoming Euro 7 standards will still require automakers to reduce tailpipe emissions such as nitrogen oxides. However, they will also set the brake dust limit, accordingly Eurektive.

2022 Renault Megan E-Tech Electric

2022 Renault Megan E-Tech Electric

Yes, EVs do not use their friction brakes like internal combustion vehicles. Thanks for this regenerative breaking. But a recent study concludes that this is not enough to offset the high weight of the EV battery pack.

The European Commission (EU’s governing body) has announced its intention to control brake dust in a 2021 policy plan, saying it would tackle “emissions from both conventional and electric vehicles alike”.

A recent (and controversial) study suggests that EVs also increase tire-related particulate emissions – again due to the extra weight of the battery pack. But these emissions are not the target of EU regulators right now.

DS E Tense Performance Prototype

DS E Tense Performance Prototype

It is not clear how automakers reduce brake dust. A recent concept of Stellantis DS Automobiles, drawn from Formula E experience, suggests how future EVs can completely eliminate friction pads.

Aggressive reproducible braking allows today’s EVR drivers to use their friction brakes less – producing less dust and making brake pads more durable.

Although not every automaker agrees on the price of one-pedal driving mode. Porsche has deliberately avoided one-pedal driving on the Tycoon, claiming that its automatic regeneration strategy – and more coastal – will be more efficient overall.

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