BMW in the world

BMW X6 M (2009-)

The BMW X6 M and X5 M are the first vehicles from BMW M GmbH to have xDrive all-wheel-drive system and automatic transmissions, and are also crossovers as opposed to passenger cars. The X6 M was unveiled at the 2009 New York Auto Show[9] and first went on sale in the 2010 model year. BMW X6 M BMW X6 M The high-performance M derivative features a twin scroll twin turbo version of the 4.4-liter V8 BMW N63 engine with the Cylinder-bank Comprehensive Manifold (CCM).[10][11] The engine is rated 555 PS (408 kW; 547 hp) at 6000 rpm and 680 Nm (500 lbft) at 1500-5650 rpm.[citation needed] Other features include 6-speed M Sports automatic transmission with aluminum pull-style paddles on steering wheel, M Dynamic Mode feature, 10 mm (0.4 in) lower Adaptive Drive suspension, 4-piston fixed calipers with 15.6" rotor at front and single piston floating calipers with 15.2" rotor at rear, 20-inch alloy wheels with 275/40R20 front and 315/35R20 run flat tires, hill descent control, dynamic stability control, special gills in the front fenders, 20-inch light-alloy wheels.[12] The car can accelerate from zero to 60 mph (097 km/h) in 4.5 seconds and 0-62 mph (0100 km/h) in 5 seconds.[13] [edit]Engine The engine utilizes BMWs M TwinPower and patented exhaust manifold technologies to increase thrust and pulling force, while preserving the most compact dimensions possible. Two low-mass twin-scroll turbochargers are positioned together with the catalytic converters in V section between the two banks of cylinders. By reversing the flow of gases through the engine from traditional arrangements, the intake and exhaust ducts are shortened and widened. The result is that pressure losses on the exhaust side are minimized. The goals were to virtually eliminate turbocharger lag while

maximizing combustion efficiency and power output. The new M V8 engine with twin-scroll twin turbo technology uses a single exhaust manifold with tuned-length runners, incorporating both cylinder banks and connecting cylinders in carefully selected pairs. This configuration, patented by BMW M and known as Cylinder-bank Comprehensive Manifold (CCM), offers quick response, a linear build-up of engine power, and a broad, consistent torque curve by feeding each of the twin turbochargers with a charge pulse at approximately every 90 degrees of crankshaft rotation, rather than the more traditional irregular schedule of charging. Coupled with special suspension specifically optimized for M that features Adaptive Drive and the newly developed M Servotronic power steering, the performance Sport Activity Vehicle promises very competent handling. Other high-tech features include launch control for maximum acceleration and a six speed M Sport automatic transmission optimized for performance. Drivers can manually select gears using either paddles or an electronic gear selector lever. Electronically controlled, variable power distribution to the front and rear axle prevents even the slightest tendency to over- or understeer right from the start, before DSC Dynamic Stability Control is even required to cut in. BMW is referring to the new 4.4-liter motor as its M TwinPower Turbo unit. The name reflects the fact that the motor features Twin Scroll Twin Turbo Technology and a common exhaust manifold encompassing both rows of cylinders. Although traction control is standard, the M Dynamic Mode (MDM) greatly optimises the aggressiveness of the system. The MDM setting allows the driver to enter a controlled drift and push the vehicles handling to the limit. There is also a DSC-Off Mode.