BMW to showcase new diesel engine at NAIAS

Successfully meeting the strict exhaust emissions requirements of the North American automobile market, the BMW Advanced Diesel engine will be introduced into the US market in the form of the 3.0-liter inline-six featuring Variable Twin Turbo Technology.

At the 2008 NAIAS, BMW is presenting this 265-hp high-performance diesel engine in both the BMW X5 xDrive35d and the BMW 335d. To ensure full compliance with the demanding emission standards in California and other US states, BMW uses SCR technology (a synonym for catalytic reduction of NO x in diesel exhaust or flue gases by nitrogen containing compounds, such as ammonia or urea.) to reduce nitric oxides (NOX), enabling nationwide introduction of BMW Advanced Diesel with BluePerformance as a 50-state model (BIN5).

Applying Variable Twin Turbo Technology, a small turbocharger first cuts in at low engine speeds. As engine speed increases, the second, larger turbocharger cuts in, developing maximum torque of 425 lb-ft at just 1,750 rpm. Interaction of the two turbochargers is controlled by a high-performance electronic engine control unit.

In addition to the above Variable Twin Turbo Technology, new technical highlights of BMW Advanced Diesel – presented for the first time in 2007 – include an aluminum crankcase and third-generation common-rail direct fuel injection. Featuring precision-quality precise piezo-injectors to deliver the precise dosage of fuel into the combustion chambers with the smallest volume of pre-injection, the third generation system ensures a particularly clean injection process with optimized fuel consumption, emissions figures and running smoothness.

This allows the diesel equipped BMW 335d to achieve an acceleration from 0–62 mph in 6.2 seconds and average fuel economy of 23/33 mpg (city/highway).

The BMW X5 xDrive35d accelerates from 0–62 mph in just 7.2 seconds and offers average fuel economy of at least 19/25 mpg (city/highway, provisional data).

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Credits: Jarvis