BMW Traction Control DTC or DSC breakdown = 10% savings!

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BMW Traction Control DTC or DSC breakdown = 10% savings!




by Christophe » 02/09/13, 13:27

For a few weeks, I have had a breakdown (reason ???) in the traction control or the stability assistance system (called DTC for Dynamic Traction Control or DSC for Dynamic Stability Control at BMW) which I have not yet had time to diagnose / repair ...

My range is a bmw 118d, has gone from less than 950 km to more than 1050 km, for "country" trips ... a good 5% to 10% fuel savings ...

At 100km I go from 5.4L / 100km to 5.0 L / 100km according to the on-board computer.

The car is more "lively" and "seems" lighter but that does not make it dangerous for all that, it just makes less "rail" must be adapted (me who drove in twingo for years that does not bother me too much) ... on the other hand, the speed regulator no longer works since the failure ... surely a security.

An estimate of autonomy by the computer:

Image

Another clue that we know how to make engines sober but full of "gadgets" (more or less useful ... ok it's useful, it's active safety ...) but which make consumption seize up. ..

Technically, the DTC / DSC must constantly play on the braking, in the end I still gain wear on the pads and discs :D

The BMW site gives this: http://www.bmw.be/be/fr/insights/techno ... ntrol.html

Dynamic Stability Control (DSC).

Dynamic Stability Control (DSC) makes it easier to control the vehicle, even in adverse conditions or on difficult surfaces, and thus increases active safety.

Dynamic Stability Control (DSC) oversees all driver assistance systems in BMW vehicles. It optimizes trajectory holding in all circumstances as well as traction during start-up or acceleration. It also detects conditions of instability such as understeer or oversteer and helps the driver to restore the vehicle to its path.

Ultra-sensitive sensors constantly detect the operating conditions in progress. This information is delivered by sensors of wheel rotation speed, steering degree, lateral acceleration, pressure and yaw rate (vehicle rotation around its vertical axis). The simulation module defined for a stable vehicle condition in the DSC control module serves as a basis for comparison with respect to the degree of steering actually applied to the steering wheel by the driver and the speed of the vehicle.

In the event of a discrepancy between the calculated setpoints and the actual measured values ​​outside the tolerance ranges, the system takes the necessary actions to stabilize the vehicle or correct the traction. To this end, the system requests engine management, braking system management and the xDrive system if it is an all-wheel drive vehicle.

The system can restore the vehicle's stability or translate a traction demand by the driver by a reduction or suspension (with a regulator of the engine inertia torque) of the engine torque as well as by a targeted application of the brakes on one or more wheels.

In combination with Active Steering, the yaw rate regulation integrated into the system can significantly reduce the steering effort at the steering wheel of the driver and the intensity of the DSC corrective intervention.


And for DTC: http://www.bmw.be/be/fr/insights/techno ... ntrol.html

Dynamic Traction Control (DTC).

Dynamic Traction Control (DTC) enables sporty and dynamic driving, even when the DSC trajectory corrector is active, to provide increased traction.

Dynamic Traction Control (DTC) is a switchable sub-function of Dynamic Stability Control (DSC). The DTC basically acts in two application spectra, namely satisfying an increased traction demand or authorizing a sporty driving when the DSC is operating.
When the front wheels are braked by the resistance of a mass of melted snow or a large thickness of snow for example, there is an apparent slip at the rear axle (the rear wheels turn faster than the wheels before, thereby establishing a power overrun criterion) which triggers the regulating intervention of the DSC motor torque. In this kind of situation, such an action would generally have the effect of reducing the engine torque more than necessary. The entry into action of the DTC exerts a positive influence in this scenario by establishing the conditions for better traction without significant reduction in the driving force.
Activating the DTC significantly increases the driver's room for maneuver until the intervention of the DSC stabilizes the vehicle. Control of the vehicle remains a prerogative in its own right for the driver.


In short, the DTC / DSC can be disabled manually, I had never done it before ... It is most certainly disabled on other cars ...

Who has a traction control that can be easily deactivated and who wants to test, at least on a tank, to compare?
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by I Citro » 02/09/13, 14:06

I conclude from this that the architecture of BMWs is a heresy (AV engine and propulsion) since without a technological crutch, the car does not have a safe driving behavior ...

On the other hand, I replaced my sedans from 1999 to have ABS on my vehicles IMPERATIVELY made essential by traffic conditions (ring road at 110kmh, safety distances not respected by the majority and arrival of ultra powerful braking including AFU).
For 5 years I ride in an electric car devoid of ABS on a ring road now limited to 90kmh without fear of putting my life in danger as 15 years ago ...

The mere fact of being front-wheel drive dispenses the vehicle from many technological add-ons necessary only in extreme conditions (snow, ice ...).

I discovered this summer that my old MPV from 1997 was equipped with an anti-lock braking system (ABR) which I did not know because I had never started it, despite the borderline situations encountered, especially in the mountains. .
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by Christophe » 02/09/13, 14:13

citro wrote:I conclude from this that the architecture of BMWs is a heresy (AV engine and propulsion) since without a technological crutch, the car does not have a safe driving behavior ...


Uh ... the architecture of Bm is historic, long before these "technological assistance gadgets" ... and to my knowledge Bm are no less secure than other cars ... good on snow is a little shitty anyway the propulsion (DSC or DTC on or off ... that's kif kif)

Equivalent to traction control there are on other brands ... and not only front engine propulsion!

ABS or ABR? What a difference?
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by Macro » 02/09/13, 14:48

What is very surprising is that with an average consumption of 5.5l / 100 your traction controller should only very rarely activate (especially in this relatively dry season)
There is a similar thing on the passat in Mamita..when the light comes on to say that it is in operation ... Well it is that we are not in eco driving ...

What is possible is perhaps the fact that since it is turned on the car may be in power limitation, one, and that the absence of regulator have lowered your consumption by the lighter foot syndrome. ..
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by Christophe » 02/09/13, 15:03

On BM, it is completely "invisible" except when you voluntarily deactivate the DTC / DSC (must work together) ... where a warning light comes on on the instrument panel.

For your note, I have the same driving style ... on the contrary I found that the regulator could consume less (on long journeys) because smoother acceleration management ... or it broke down there. ..

But you do well to talk about eco driving because I forgot to post the link to the subject in the 1st message, here it is: https://www.econologie.com/forums/l-ecocondu ... 10265.html
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by sherkanner » 02/09/13, 15:11

I'm going to have to try on my bike, even if I have the same effects ^^
I'm just gonna have to avoid the suns and it should be fine
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by chatelot16 » 02/09/13, 15:26

bmw shit? of course !

BMW style propulsion is good when the weather is nice, and you have a powerful engine, and you can make it go cross in n turns, and you know how to do it

to drive smoothly, so without having the habit of playing a race car, the front-wheel drive is so much better!

a GS with its narrow tire is certainly not as good as a BMW on a dry road, but it does not matter since when we do not race, all the cars are good enough

but in rain or snow, the BMW is worth nothing, when it is on dangerous roads that you need a good car

well agree with citro: good front wheel drive is much better without any electronic gadget!

the superiority of the front wheel drive is not definitive: the driving wheels must be placed under the engine as long as there is a large engine

for the car of the future at very low speed the engine will be lighter, and we can think of putting the drive wheels under the payload, so in the rear like a truck
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by Christophe » 02/09/13, 15:32

You are turning away from the subject ... and especially from my question!
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by Macro » 02/09/13, 15:46

Frankly I doubt that the driving aids have fun playing the brakes in normal use ... In extreme conditions OK but when the user makes the average 5l5 with a car of 1T5 ... It is don't impornawak ...

The speed regulator, well there's everything ... My friend is 2l / 100 more with his motorhome on the highway at 110km / h with the regulator than without ... Quite simply without the regulator he goes back to 5 in the ratings. .With it remains on the 6th and the calculo fed the coconut motor ... I had the same phenomenon with the CC of my old ...
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by Christophe » 02/09/13, 15:50

Well I think there is an influence all the time since since the breakdown, I feel that the car is "lighter / more responsive" than before ... in short, it is less "rail" ...

You who are a biker, you know what a rail means ...
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