Published November 20, 2012
By Philippe Crowe
BMW is ramping up to have a strong green presence at the Los Angeles International Auto Show which begins at the end of this month.
As expected, the striking BMW i8 Concept will be there. With a total powertrain output of 354 horsepower, zero-to-60 mph in 4.6 seconds and a very unique style, BMW expects the BMW i8 Concept Roadster to stun the city of Los Angeles.
The BMW i8 Concept Roadster is seen by BMW as a car with genuine sports car performance, yet offering an estimated 78 mpg (in the U.S.), better than most would expect from a small economy car.
The BMW i8 Concept Roadster is a plug-in hybrid vehicle powered by a high-performance drivetrain combining electric motor and gasoline combustion engine.
BMW said ?there will be more BMW i news at the show.? This has led many to believe the i4 will finally see the light. We will keep you posted.
Also part of the green side of BMW presence, but closer to production, are the BMW ActiveHybrid 3 and ActiveHybrid 5.
The 300 horsepower inline-6 engine with BMW TwinPower Turbo technology in the BMW ActiveHybrid 3 (starting at $50,195 including Destination & Handling) and ActiveHybrid 5 ($61,995 including Destination & Handling) is the same engine renowned for its free-revving capability, pulling power and efficiency in the BMW 335i and 535i.
The electric motor it is combined to, meanwhile, develops 55 horsepower and is supplied energy by a high-voltage lithium-ion battery integrated underneath the luggage area. Power is transferred to the rear wheels by BMW?s eight-speed automatic transmission.
In addition to full-hybrid design, which enables purely-electric and therefore local emissions-free driving in urban conditions or while coasting, BMW says the ActiveHybrid 3 and ActiveHybrid 5 boast significant improvements in fuel efficiency.
Charging of the high-performance battery primarily takes place during coasting or braking, the electric motor performing the role of a generator feeding energy into the high-voltage battery.
By contrast, under acceleration the electric motor takes on a boost function. In this case, it assists the gasoline engine with a burst of power. While coasting at speeds of up to 100 mph in ECO PRO mode, the combustion engine may be switched off and fully decoupled.
To avoid periods with the engine running at idle at intersections or in traffic jams, the BMW ActiveHybrid 3 deploys its hybrid start-stop function.
BMW says the power electronics can be linked up with BMW?s latest navigation system (optional on the ActiveHybrid 3). This allows for proactive analysis of the driving situation, enabling the drive components to be primed to deliver maximum efficiency (the effect may vary according to the quality of the available navigation data).
Source: http://www.hybridcars.com/news/bmw%E2%80%99s-green-presence-la-62133.html
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