Der Allradantrieb im F54 Clubman

Auf dem Ipad kann man denn Aii4 schon Konfigurieren

Motoringfile hat die Tage was zum Allrad geschrieben:
http://www.motoringfile.com/2016/05/16/45889/

Dabei auch technische Informationen:

Zitat

Technical Details

The system is major revision to the one that debuted on the R60 Countryman. Power from the front drive to the rear axle is transferred by means of an angular gear (Power Take-Off) on the front differential and a two-part cardan shaft. The central component of the four-wheel drive system is an electro-hydraulically controlled multiple-disk clutch (Hang-On) inside the rear axle drive, which facilitates infinitely variable distribution of torque to the front and rear wheels. The corresponding commands are provided by an electronic control unit which, like the hydraulic pump, is located on the rear axle. The idea is completely invisible engagement resulting in constant traction in any condition.
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The angular gear is mounted behind the engine on the automatic transmission and crankcase. The input shaft is a hollow shaft construction and directly connected to the front axle differential. In this way, part of the drive force is transferred from the differential basket to the cardan shaft via the hollow shaft, the crown wheel and the pinion shaft. The angular gear operates at a fixed gear ratio (1:1.74) and is permanently engaged, meaning that the cardan shaft always rotates when the vehicle is driven. Reversal of transmission takes place in the rear axle drive so that the front and rear axle drive shafts both rotate at exactly the same speed.

The multiple-disk clutch located in the rear axle drive (Hang-On) directs a proportion of torque to the rear wheels according to each driving situation, ensuring optimal power distribution between the front and rear. In extreme cases (e.g. the front wheels are standing on ice), the ratio can be 0:100. The required operating pressure (0 to 40 bar) is delivered by an electro-hydraulic pump, the speed of which is defined by a pulse-width-modulated signal from the electronic control unit. Pressure is not measured by a sensor, but extremely accurately by means of voltage and power alignment. In order to ensure maximum positioning accuracy, run-in behaviour and temperature influences are independently compensated, the system constantly adapting to ever changing operating conditions. We told you this is an improvement.

As before, when extra traction isn’t required the ALL4 system reverts to front wheel drive improving efficiency. That means the pump is deactivated, rendering the system unpressurised. In order to make use of additional saving potentials, the system has a multiple-disk clutch with a spring-loaded Efficient valve, which lowers the oil level in the clutch and significantly reduces friction losses (oil splash losses). When required, the system takes only fractions of a second to build up maximum operating pressure in the Efficient mode and thus deliver maximum torque to the rear wheels. As you’d expect this all happens without loss in traction or any discernible change in the drivetrain.

Like all MINI and BMW all wheel drive systems, everything is managed from the control unit of the Dynamic Stability Control feature (DSC). DSC analyses a large amount of data providing information in an effort to ensure optimum distribution of drive torque. This information includes vehicle speed, lateral and longitudinal acceleration, steering angle, wheel speed, longitudinal inclination, accelerator position and the setup via Driving Experience Control. Any adjustments are made within fractions of a second in an effort to make power distribution between the two axles virtually unnoticed by the driver. In addition to this, torque distribution is precisely regulated as to avoid any loss of power due to wheel spin.

Due to the DSC controlling everything, wheel slip can be detected at an early stage. In an example where a Clubman threatens to drift outwards over the front wheels (understeer), increased tractive force is supplied to the rear axle, allowing the vehicle to turn in more accurately. On the other hand, ALL4 directs excess force to the front wheels, should the rear of the vehicle threaten to swerve outwards. As a result, maximum four-wheel performance is available even before slippage occurs. Put simply, the updated system not only ensures best possible traction and safety in wet or snowy road conditions, but also enhances vehicle stability, cornering dynamics and ride comfort. Further, in driving situations where the interconnection of all four wheels is disadvantageous – i.e. in an emergency stop – the system opens the multiple-disk clutch completely within milliseconds.

Only if optimum power distribution to the front and rear axle is not sufficient to keep the Active Tourer on the desired course, DSC intervenes by reducing engine output and/or by decelerating individual wheels. Moreover, DSC assumes the function of a transverse differential lock: If a wheel spins without transferring power, it is automatically slowed down, whereby the axle differential directs more power to the wheel opposite.

Quelle: http://www.motoringfile.com/2016/05/16/45889/

Alles anzeigen

Wie sind eure Erfahrungen mit dem Allrad? Also mir gefällt er recht gut allerdings ist in gewissen Fahrsituationen eine frontlastige auslegen doch gut spürbar.

Ich hatte mit meinem SD All4 schon einige "Schlechtwetter" Matsch und Starkregenfahrten und empfinde den Allrad als sehr souverän und bemerke kaum Antriebseinflüsse an der Vorderachse.

VG Stephan

Nach jetzt 2.500 km ist mein Clubbi seit diesem Wochenende eingefahren. Mit dem Allradantrieb habe ich nur gute Erfahrungen gemacht, besonders im Tiefschnee, und Antriebseinflüsse oder Frontlastigkeit sind mir bisher nicht aufgefallen. Ich bin aber seit 6 Jahren auch nur Allrad-MINIs gewöhnt.

Zitat von Kinglui08

Wie sind eure Erfahrungen mit dem Allrad? Also mir gefällt er recht gut allerdings ist in gewissen Fahrsituationen eine frontlastige auslegen doch gut spürbar.

fährt!

In diesem Thread werden auch einige Erfahrungen/ Erlebnissen beschrieben des Allrads
F54 S vs ALL4

Habs dann auch noch mal geschafft meine Auto Zeitung zu lesen (Single Test Countryman) und selbst hier würd diese frontlastigkwit des Allrad beschrieben naja hier auch zu lesen vollwertiger Front Antrieb mit elektrisch zugeschaltetem Heck naja also ich hatte bis jetzt mit dem clubby Auf nassem Asphalt starke lenkeingriffe der Vorderachse bei stärkerer Beschleunigung

Der Allrad im Clubman gepaart mit dem Works Motor ist ganz grosses Kino.

Die Strassenlage und der Vortrieb sind wirklich super. Egal ob aus einer engen Kurve rausbeschleunigen oder kräftiges anbremsen, der Clubby bleibt schön leicht zu steuern, kein bisschen unruhig und auch reissen an der Lenkung sind echt nicht zu spüren.

Wer die Kombination sein eigen nennen kann, den kann man echt beglückwünschen die Wahl getroffen zu haben.