Bayerische Motoren Werke's engineering prowess is long established, as is its well-worn rep as purveyors of 'ultimate driving machines.' With its EfficientDynamics program, BMW is drawing from its considerable expertise in an effort to continue to develop engaging, sports-themed cars while at the same time improving the efficiency of its vehicles through the use of new technologies.The BMW Vision EfficientDynamics Concept is designed and billed as the ultimate expression of BMW's emerging strategy. The Vision features seemingly every high-tech, lightweight, and aerodynamic trick the company has developed in an all-out effort to improve efficiency. And of course, BMW also says the Vision is designed to deliver an exhilarating driving experience. The end result is a lightweight, 2+2 coupe powered by a plug-in hybrid drivetrain that BMW says develops a total output of 356 horsepower.
The aerodynamic tricks aren't limited to obvious body modifications, either. Underneath, the entire underbody of the car is smooth and flat to minimize drag. Up front, active louvers in the fascia close when the airflow to the radiator isn't needed, streamlining the front of the car. Below them, small ducts in the air dam direct air through special passageways and out into the front wheel wells, creating a high-velocity curtain of air over the front wheels that BMW says aids stability.
The wheels themselves are also designed for aerodynamics with the profiles of the individual spokes designed to cut cleanly through the air and, again, minimize turbulence and drag. Despite their massive size, the wheels are wrapped in 195/55 narrow, low-profile tires to minimize rolling resistance. To keep the handling sporty, they're wrapped around 21-in. wheels that help give the tires a larger contact patch, one that is longer than it is wide for minimal wind resistance. All told, the Vision slips through the air with only a 0.22 coefficient of drag, significantly better than the 2010 Toyota Prius' 0.25.
No comments:
Post a Comment