BMW 640d xDrive

Powerful forms and flowing lines unite at the BMW 6 Series Coupe and the Cabriolet to a fascinating dynamic. BMW now expanded its model range by an additional variant. For spring 2012, is the BMW 640d xDrive Coupe and Cabriolet to the starting line. This ensures the first time in the BMW 6-series introduced all-wheel system is now in conjunction with the 313-hp inline six-cylinder diesel engine and Twin-Turbo Power for a further increase driving pleasure.

The new BMW 640d xDrive Coupe accelerates in just 5.2 seconds from 0 to 100 km / h and ended its driving at an electronically limited 250 km / h. With pure rear-wheel drive BMW 640d Coupe accelerates in 5.3 seconds to 100 km / h. The consumption of the BMW 640d xDrive Coupe amounts to average 5.7 to 5.8 liters per 100 kilometers (depending on the selected tire size), which corresponds to CO2 emissions of 149-153 g / km.

The convertible versions are also electronically limited at 250 km / h and just as strong spurt. In the BMW 640d XDrive convertible pass just 5.4 seconds for the classic sprint from 0 to speed 100. This contrasts with an average consumption of 5.9 to 6.0 liters per 100 kilometers (CO2 emissions of 154-158 g / km).

The 3.0-liter diesel power also generates 630 Nm torque and is equipped with an eight-speed sport automatic transmission combination. The generated torque is distributed with the help of precise and xDrive variably between the front and rear wheels. With the DSC (Dynamic Stability Control) networked electronic control system allows the meantime, a perfect traction and superb handling in all weather conditions and road conditions.

Sustained power: straight-six diesel engine with twin-turbo power:

The employed in the BMW 6 series diesel engine with its spontaneous response behavior and its pulling force meets all the requirements that are sportier to drive units is oriented vehicles. The new BMW 6-series profile of the attractive and equally exclusive sporting and economic luxury coupes will now consistently sharpened.

 The two-stage turbocharging ensures a spontaneous and vehement power delivery. The new version of the charging levels responds more accurately to the needs of the current driving situation. At low speeds a small is active as a result of lower inertia moment of especially spontaneously appealing charger first. The air compressed that it will perform a bypass line directly to the combustion chambers.

Since the air no longer passes through the large turbocharger unit, there is a loss-free construction of boost pressure. Only at higher power demand is stimulated by an electronic control unit, the larger the bypass loader. In addition, a optimization based on the respective load request response of the turbocharger with a variable turbine geometry for the smaller of the two chargers.

This leads to more spontaneous response to accelerator pedal movement each. Already between 1,500 and 2,500 rpm, the engine is its maximum torque of 630 Nm available. Its maximum power is used the unit at a speed of 4,400 trips. Powerful acceleration processes are completed in as easily as dynamic bursts of speed.

Since the eight-speed sport automatic is precisely matched to the performance characteristics of the engine, which can be high and wide load ranges across the available torque in an ideal way for sports and confident driving at the same time use. In another standard "Eco Pro" mode, the power reserves of wear sporty diesel engine, however, especially for a relaxing and intense at the same time highly efficient driving at low engine speeds.

BMW EfficientDynamics as standard switches and driving experience:

The "Eco Pro" mode, which can activate the driver with the standard switch affects driving experience, engine control, the accelerator pedal characteristic curve and the switching characteristics of the automatic transmission. In addition, a specific power control provides for electrically operated features like air conditioning and seat and exterior mirror heating for a highly efficient energy management. The other standard EfficientDynamics technology in the BMW xDrive Coupe or convertible 640d also include a brake energy recovery, the auto start stop function, the demand management of ancillary units and an active air flap control.

In this way, besides the accelerator pedal progression, the responsiveness of the engine, the characteristic curve of the steering power assistance, the response thresholds of driving stability control DSC and the switching dynamics of the automatic transmission also affects the characteristic diagram of the damper and the roll stabilization.

This enabled the driver in each case a pre-configured and coherent overall setup that includes the sound of the motor feedback. For this purpose, based on the current driving situation and driving experience of the selected mode switch enhances the natural sound of the engine components of a sound module and transported into the interior.

The digital signal processing of the system is in direct communication with the motor controller and takes account of both the engine speed and the torque and the vehicle speed. As a result, the driver arrived at a very precise idea of ​​the respective load of the engine and to an even more intense perception of power development and the driving situation.

Even more driving pleasure through intelligent all-wheel drive:

The introduction of the xDrive all-wheel drive system in the BMW 6-series enhances the driving experience in a premium luxury coupe of a more attractive facet. The BMW 640d xDrive Coupe and Convertible is the latest version of the intelligent all-wheel system is used, which includes the variable power transmission to the front and rear wheels and the "Performance Control" for situation-based distribution of drive torque between the right and the left rear wheel.

The electronically-controlled xDrive system is designed not only to optimize traction on slippery surfaces, but also to enhance driving dynamics curves. By linking the wheel to the vehicle stability control system DSC (Dynamic Stability Control), all driving situations are identified and assessed to businesses to make the appropriate control action. In normal operation, the system transmits 60 percent of drive torque to the rear axle and 40 percent to the front axle. If necessary, xDrive adjust the distribution rate within milliseconds to changing conditions.

Anticipatory analysis and precise thanks to networking operations:

Its status as an intelligent xDrive all-wheel system is due to the fact that there is already an early stage the risk of traction and the spinning of all-wheel more wheels may be counteracted by a change in power distribution. For this prospective analysis of the driving situation, the available data of the engine control, the accelerator pedal position, the steering angle, the wheel speeds and the lateral acceleration of the vehicle are taken into account.

Thanks to this wealth of information xDrive, the force distribution between front and rear axle always controlled manner so precise that the engine power is fully utilized. Unlike conventional all-wheel systems, which always react only when one wheel is spinning, xDrive thus eliminates any risk of over-or under steer early on. If the vehicle example, the front wheels to move outward, the system immediately directs a higher portion of the drive power to the rear wheels.

As a result, steers the vehicle a more precise and xDrive has been optimized directional stability, even before the driver needs to even notice. Equal foresight can xDrive counteract the outbreak of the rear wheels by excess power is directed to the front axle. Sun-wheel-drive performance is available, yet can cause any slippage.

Even the ride is sponsored by intelligently controlled torque distribution. The stabilizing effect of the DSC, xDrive requires intervention only in extreme situations. Only when the optimal power distribution is no longer enough just to keep the vehicle on the desired course, the DSC control system responds with a reduction in engine power and braking individual wheels.