Recuperation question

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DocH
Posts: 14
Joined: Mon Aug 14, 2023 8:25 pm

Post by DocH »

Ok, so a newbie question to start with.
Do the brake lights come on when you are recuperatiing?
Guess it's a good idea to warn driver behind that you are slowing, but not something that can be checked from the driver's seat!
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Tony
Posts: 458
Joined: Wed Nov 03, 2021 9:27 am
Location: London

Post by Tony »

This will help

hugodoodle
Posts: 94
Joined: Wed Oct 06, 2021 4:35 pm

Post by hugodoodle »

Type approval legisalation (ECE R13-H) defines this:

At vehicle deceleration ≤ 0.7 m/s2 the brake lights shall not be activated
At vehicle decelerations > 0.7 m/s2 and ≤ 1.3 m/s2 the brake light may be activated
At vehicle deceleratoins >1.3 m/s2 the brake lights shall be activated

For reference, full ABS braking is ~10 m/s2, though most braking events are below 3 m/s2.

In general, when decelerating through regen the brake lights will be activated.
Q4 50 Quattro Edition 1 C+S
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DocH
Posts: 14
Joined: Mon Aug 14, 2023 8:25 pm

Post by DocH »

Thanks both, useful to know.
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MY24 Q4 Black Edition
Navarra Blue, Tech Pack
Intelligent Octopus, Simpson & Partners Home Plus charger
https://share.octopus.energy/kind-star-628
=======================================
ScottyQ4
Posts: 141
Joined: Sun Sep 12, 2021 6:26 pm

Post by ScottyQ4 »

Like you I was concerned about the brake lights not being shown when you know as the driver that the vehicle is slowing particularly when the autonomous braking kicks in. The regen paddles have 3 levels of braking action. In my experience the first 2 stops serve as ‘engine’ braking with no lights and the 3rd stop being the max regen and the lights being activated. Now that the dark nights are returning you can see the glow of high level brake particular if the rear screen is misty or better still when it’s foggy.
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