Warning lights and braking hard

[hybris4u]

Just a stupid question (not tested yet)

When braking hard in standard mode the warning lights turn on.

My question if they come on when in M/MDM mode? I assume they don't as it would be kind of stupid on a track where you break hard all the time... No have not tried braking really hard in M/MDM mode but yes have in standard mode and the warning lights did turn on.

[Artemis]

Brake Force Display (BFD): http://www.1addicts.com/forums/showthread.php?t=611959
Except if mistaken, it cannot be switched off (regardless DSC off - MDM Mode)

[mlhj83]

Originally Posted by hybris4u

Just a stupid question (not tested yet)

When braking hard in standard mode the warning lights turn on.

My question if they come on when in M/MDM mode? I assume they don't as it would be kind of stupid on a track where you break hard all the time... No have not tried braking really hard in M/MDM mode but yes have in standard mode and the warning lights did turn on.

They come on regardless of DSC mode in my M3, but only just before the car comes to a complete stop after hard braking. The 1M should be the same - have not seen my friend's 1M warning lights come on on track. I feel that it is well calibrated, as it never comes on on track no matter how hard you brake. You literally have to come to a near halt after heavy braking for it to come on.

[mlhj83]

Originally Posted by Artemis

Brake Force Display (BFD): http://www.1addicts.com/forums/showthread.php?t=611959
Except if mistaken, it cannot be switched off (regardless DSC off - MDM Mode)

BFD are separate from warning lights ie the yellow blinkers. The BFD come on every time you brake hard enough on track or on the road. The warning lights come on when you come to a near halt after heavy braking.

[hybris4u]

Make sense! Thanks!

[Dackelone]

Originally Posted by Artemis

Brake Force Display (BFD): http://www.1addicts.com/forums/showthread.php?t=611959
Except if mistaken, it cannot be switched off (regardless DSC off - MDM Mode)

+1. Yup.


But... US spec cars do not have this feature. Nor do we get the flashing/pulsing third brake light either.

[mlhj83]

In summary for our cars (except for US):

Brake hard --> BFD comes on --> near halt --> warning/emergency lights come on.

[Aetey]

Originally Posted by mlhj83

They come on regardless of DSC mode in my M3, but only just before the car comes to a complete stop after hard braking. The 1M should be the same - have not seen my friend's 1M warning lights come on on track. I feel that it is well calibrated, as it never comes on on track no matter how hard you brake. You literally have to come to a near halt after heavy braking for it to come on.

This. And yes the car does this even when care bear mode is turned off.

[Artemis]

Originally Posted by mlhj83

In summary for our cars (except for US):

Brake hard --> BFD comes on --> near halt --> warning/emergency lights come on.

Triggered after the anti-lock brake sensors detect a rate of deceleration in excess of 5 m/second square. Otherwise stated: brutal braking.

[mlhj83]

Originally Posted by Artemis

Triggered after the anti-lock brake sensors detect a rate of deceleration in excess of 5 m/second square. Otherwise stated: brutal braking.

Sweet. Where did you get that figure from.

[Artemis]

Originally Posted by mlhj83

Sweet. Where did you get that figure from.

I posted a description last year (http://www.1addicts.com/forums/showp...2&postcount=15). Although the link to the quoted article is dead now, here it is:

"Brake Force Display
BMW continues to drive its innovation forward with the release of Brake Force Display, a dynamic safety enhancement feature available on most models from May 2004.
Brake Force Display is a simple yet effective way of communicating to following traffic that the BMW in front is stopping quickly, providing extra advance warning of a potential road hazard ahead. This should help lessen the need for harsh emergency braking by following drivers who now have extra reaction time.
Brake Force Display warning has been fitted to BMW vehicles sold in the United States for some time, and has just gained approval by regulatory bodies in Europe and Australia for use in these markets.
BMW hopes the adoption of Brake Force Display will lead to a reduction in avoidable rear-end collisions as well as help prevent loss of control caused by panic braking in vehicles not equipped with advanced electronic chassis systems such as BMW's Dynamic Stability Control III.
Sudden stops - emergency braking - are not a regular element of everyday driving. But it's precisely at these moments that the fast reactions of drivers behind are most important. Brake Force Display is a dual-stage brake light system. For normal braking, the main light element is illuminated; for harder, sudden braking, the entire brake light glows red. Drivers behind intuitively understand and can react accordingly.
Here's how it works
Brake Force Display works by increasing the intensity of the brake lights in the rear lamp clusters by expanding the number of illuminated LEDs when heavy braking is detected. The extra lighting is triggered after the anti-lock brake sensors detect a rate of deceleration in excess of 5 m/second square.
As an example of the force of the braking, at 5 m/second square a briefcase placed on a car seat would accelerate off the seat onto the floor. The system reacts within a few tenths of a second to increase the intensity of the stoplight illumination, projecting a highly visible warning beacon to following traffic. Only deceleration forces trigger Brake Force Display, not simply pedal pressure, in order to avoid unnecessary illumination.
BMW 5 Series, X3 and 6 Series Coupe and Convertible was fitted with Brake Force Display technology from March 2004 production, and the 3 Series, X5 and Z4 Roadster included the feature from April 2004 production.
Brake Force Display joins a long list of safety feature firsts introduced as standard equipment on BMW vehicles sold in Australia and other markets under its industry-leading FIRST (Fully Integrated Road Safety Technology) policy which includes anti-lock brakes, traction and stability control, dual-stage intelligent airbags and rigid body shells equipped with impact absorbing crumple zones."

Try it at some late evening on a calm, dry road (but without other road users around, otherwise you might expect some "WTF?" reactions): get some speed, brake hard to standstill (as if you really want to stop the 1M by all means), experience the deceleration G-force resulting from the mighty ///M brakes at work (very likely also the ABS, a feeling as if a bag of marbles is tickling your right foot), and you'll notice that at the brink of standstill the hazards (all blinkers) will be activated (they don't switch off automatically - you need to do it - the car computer thinks you're facing an emergency situation).

[mlhj83]

Originally Posted by Artemis

I posted a description last year (http://www.1addicts.com/forums/showp...2&postcount=15). Although the link to the quoted article is dead now, here it is:

"Brake Force Display
BMW continues to drive its innovation forward with the release of Brake Force Display, a dynamic safety enhancement feature available on most models from May 2004.
Brake Force Display is a simple yet effective way of communicating to following traffic that the BMW in front is stopping quickly, providing extra advance warning of a potential road hazard ahead. This should help lessen the need for harsh emergency braking by following drivers who now have extra reaction time.
Brake Force Display warning has been fitted to BMW vehicles sold in the United States for some time, and has just gained approval by regulatory bodies in Europe and Australia for use in these markets.
BMW hopes the adoption of Brake Force Display will lead to a reduction in avoidable rear-end collisions as well as help prevent loss of control caused by panic braking in vehicles not equipped with advanced electronic chassis systems such as BMW's Dynamic Stability Control III.
Sudden stops - emergency braking - are not a regular element of everyday driving. But it's precisely at these moments that the fast reactions of drivers behind are most important. Brake Force Display is a dual-stage brake light system. For normal braking, the main light element is illuminated; for harder, sudden braking, the entire brake light glows red. Drivers behind intuitively understand and can react accordingly.
Here's how it works
Brake Force Display works by increasing the intensity of the brake lights in the rear lamp clusters by expanding the number of illuminated LEDs when heavy braking is detected. The extra lighting is triggered after the anti-lock brake sensors detect a rate of deceleration in excess of 5 m/second square.
As an example of the force of the braking, at 5 m/second square a briefcase placed on a car seat would accelerate off the seat onto the floor. The system reacts within a few tenths of a second to increase the intensity of the stoplight illumination, projecting a highly visible warning beacon to following traffic. Only deceleration forces trigger Brake Force Display, not simply pedal pressure, in order to avoid unnecessary illumination.
BMW 5 Series, X3 and 6 Series Coupe and Convertible was fitted with Brake Force Display technology from March 2004 production, and the 3 Series, X5 and Z4 Roadster included the feature from April 2004 production.
Brake Force Display joins a long list of safety feature firsts introduced as standard equipment on BMW vehicles sold in Australia and other markets under its industry-leading FIRST (Fully Integrated Road Safety Technology) policy which includes anti-lock brakes, traction and stability control, dual-stage intelligent airbags and rigid body shells equipped with impact absorbing crumple zones."

Try it at some late evening on a calm, dry road (but without other road users around, otherwise you might expect some "WTF?" reactions): get some speed, brake hard to standstill (as if you really want to stop the 1M by all means), experience the deceleration G-force resulting from the mighty ///M brakes at work (very likely also the ABS, a feeling as if a bag of marbles is tickling your right foot), and you'll notice that at the brink of standstill the hazards (all blinkers) will be activated (they don't switch off automatically - you need to do it - the car computer thinks you're facing an emergency situation).

Cheers for the data. Yes, I've already experienced it many times on track with regards to BFD - comments from other track users. Emergency lights have switched on when I have have to brake hard for sheep, deer etc on my night drives in the country side.

[ruf]

How about the brake lights flashing ? ( see : Vid 1 " first lap " @ 1:24 http://www.1addicts.com/forums/showthread.php?t=705888 )
Is that related to the bfd too ?
Cool feature !