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BMW Introduces Two-Mode Hybrid Concept at Frankfurt

The Concept X6 ActiveHybrid

BMW introduced the Concept X6 ActiveHybrid—an application of the two-mode hybrid system developed in partnership with GM and DaimlerChrysler (earlier post)—in another just-announced concept car, the X6 “Sports Activity Coupé” at the Frankfurt Motor Show.

BMW says that the Concept X6 ActiveHybrid reduces fuel consumption by up to 20% compared to a comparable car running on a combustion engine.

The two-mode system in the BMW Concept X6 ActiveHybrid combines two compact, high-performance electric motors with a electrical continuously variable transmission (ECVT) transmission using fixed transmission ratios. These drive systems are connected to one another by three planetary gearsets allowing a power split covering the drive forces of the combustion engine and the electric motors in two transmission ranges, thereby providing optimum power and maximum efficiency under all driving conditions and power requirements from the driver.

In the power split drive mode, also referred to as the output branched concept, one of the two electric motors acts as a generator, converting some of the engine’s power into electrical current subsequently fed to the battery or the second electric motor. The second electric motor then converts such power coming from the first electric motor or from the battery back into mechanical power for the output drive shaft on the transmission.

Where GM is using the full-range optimization of the two-mode drive system to enhance towing capabilities of its full-size SUVs that are its initial targets for the system, BMW is highlighting the potential for enhanced performance and driving dynamics, along with reduced fuel consumption.

BMW Concept X6 ActiveHybrid can be driven on electric power only, on the combustion engine alone, or with a combination of both power units. When operating in all-electric mode, the underfloor protection panel moves up to cover the two tailpipes on the exhaust system as long as they are not required for their normal purpose.

Daimler’s Mercedes-Benz also introduced a two-mode SUV at Frankfurt. The ML 450 Hybrid is due to be launched on the market in 2009 as a gasoline hybrid using the two-mode hybrid drive. With a combined system output of 250 kW (340 hp) and a combined maximum torque of 480 Nm, the ML 450 Hybrid consumes 7.7 liters per 100 kilometers (30.5 mpg US)—equivalent to CO2 emissions of 185 g/km. (Earlier post.)

In parallel to the Global Hybrid Cooperation effort with GM and DaimlerChrysler, BMW has also entered into yet another joint venture with DaimlerChrysler to develop components for a mild hybrid drive in luxury performance sedans. (Earlier post.)



Here we go again.......in order to avoid the inevitable comments about how this is a bad thing, can someone just cut and paste the comments from the Porsche hybrid article from yesterday, so we can just get past it?

Max Reid

Here we go, more Hybrids coming to market place. With a hatchback style design, it should offer more passenger and cargo space. Good design & engineering.

I wish capacitors also are used to capture more energy.

Inevitable, even after OPEC increasing the supply by 500,000 barrels / day, Crude floats at $ 77 + / barrel.


Congrats to BMW!!

I can't wait to buy my first BMW hybrid! I'd pay for one right now if it was available.


@BMW_4_ever: then go and buy a 1 series; already available since half a year; micro-hybrid...


The 1 series is not available in the US and I'm more of a 5 series/X5 kind of guy :)


The same micro hybrid technology is also avaiable in the 3 Series Coupé (320cd)

click here

If you’ re like me, every week you faithfully set out your recycling bin next to the garbage, trying to do your part in saving the earth. You put in the cans, bottles, newspapers, cardboard and scrap paper; maybe if you’ re really ambitious, you have a green waste container and a motor oil receptacle, too.

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