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M3 Coupe - E92 (2007 - ...) - Engine Management and Brake Energy Regeneration

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M3 Coupe - E92 (2007 - ...)
Brand new in Technology and Design
The V8 Powerunit
Engine Management and Brake Energy Regeneration
Body Design
Carbon Roof, Colours and Rev Counter
Quality Craftsmanship and Audio System
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New engine management and Brake Energy Regeneration
The electronic management of the V8 power unit coordinating all engine functions with optimum efficiency and precision, is yet another new development. A further point is that the control unit masterminds all the M-specific functions of the clutch, transmission, steering, and brakes. And last but not least, the engine control unit performs a wide range of on-board diagnostic functions, as well as other control operations involving, say, various ancillary units on the engine.
A particular highlight in engine management is ion flow technology serving to detect the risk of the engine knocking as well as mis-firing and mis-combustion. Contrary to conventional technologies, this new technology monitors the engine and performs its function precisely where things count most, that is within the combustion chamber. To do this, each cylinder is checked via the spark plug for any possible knocking, and is then controlled accordingly. At the same time the system checks the ignition and recognises any mis-firing, the spark plug thus serving as an actuator for the ignition and as a sensor monitoring the combustion process. In this way the spark plug is able to distinguish between mis-combustion and mis-firing, also facilitating the process of engine diagnosis for highly efficient service and maintenance through its dual function.
Intelligent energy management featuring Brake Energy Regeneration likewise serves to further enhance the efficiency of the V8 power unit in the new BMW M3. In this case the power required for the on-board network is generated specifically during overrun and during application of the brakes, serving to charge the car’s battery at exactly the right time without taking up any of the energy contained in the car’s fuel. As long as the engine is “pulling” the car, therefore, the alternator generally remains disengaged. Apart from particularly efficient generation of electric power, this also serves to provide more drive power and traction for supreme acceleration at all times.

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Aluminium suspension for driving pleasure of the highest standard
Smoothly and efficiently sharing out steering and drive forces on the front and rear axle, the chassis and suspension of the new BMW M3 provides the ideal foundation right from the start for particularly dynamic performance and driving characteristics. The chassis of the new BMW M3 is indeed a brand-new development from the ground up, seeking to cope from the start with the significant increase in drive power and save a lot of weight in the process. Precisely this is why nearly all components on the newly developed front axle are made of aluminium, among them the spring struts even stiffer than before, the swivel bearings, the central subframe and an additional thrust plate enhancing crosswise stability of the entire front section. Indeed, the engineers at BMW GmbH have even succeeded in saving additional weight on the high-performance brake system with its compound brake discs. The five-arm rear axle of the BMW M3 in lightweight technology is also a brand-new construction from the ground up, with the exception of one single track control arm. The particular design and construction of all aluminium arms in forging technology, in conjunction with the aluminium dampers, serves to reduce weight on this part of the car alone by 2.5 kg or 5.5 lb.
Anti-roll bars optimised for their function and minimum weight are featured both front and rear. The change in axle geometry in both cases – featuring two additional longitudinal bars, apart from other new or modified components – offers new axle kinematics tailored to the high power of the car and its particularly sporting and dynamic overall character.
The new final drive on the BMW M3 comes complete with a Variable M Differential Lock providing up to 100 per cent locking action in a completely variable process whenever required and thus ensuring optimum traction on all surfaces. Responding to differences in speed between the right and left rear wheel, the Variable M Differential Lock also offers ideal support further enhancing the positive features and characteristics of rear-wheel drive. The result of these many improvements on the chassis and suspension also comes out clearly on the race track, the new BMW M3 significantly outperforming the lap times of all model generations on the Nordschleife of Nürburgring, where all BMW M Cars are put through their paces for their ultimate test.

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MDrive button for the ambitious driving enthusiast
Enjoying the qualities of the new BMW M3, the driver is able to configure several driving parameters indivdually according to his particular requirements, thus adjusting the car’s behaviour and performance to his personal preferences. One option, for example, is to completely deactivate the Dynamic Stability Control (DSC) via the car’s set-up. Electronic Damper Control (EDC), in turn, which optimises both vertical vibration behaviour as well as the car’s dive and roll in bends and when applying the brakes and accelerating by adjusting damper forces, comes with three different settings – Normal, Comfort, and Sports – the driver is able to pre-select at the touch of a button. Three control maps are also available for precise, on-demand management of the engine. These management functions operate not only on the position of the throttle butterflies in the intake manifold, but also on further factors and parameters significantly changing the behaviour and response of the engine.  The optionally available MDrive configuration enables the driver to pre-select the response of the Servotronic power steering. In the process, MDrive is able to follow two control maps varying steering forces between the Normal and Sports setting as a function of road speed.



Last Updated on Monday, 12 April 2010 14:36  
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