BMW X3 Hybrid Vehicle

The BMW Concept X3 EfficientDynamics achieves an increase in performance while improving on the fuel consumption by up to 20% over the standard X3.

Whenever the driver applies the brakes and slows to a standstill, the gas engine is switched off, negating fuel consumption and emissions. The electric motor is converted into an alternator, recharging the power supply. When the accelerator is depressed, the engine restarts automatically.

If the driver continues to apply the accelerator, the 400Nm electric motor starts automatically, delivering a claimed maximum output of 61kW. Under moderate acceleration, the system uses only the electric motor to minimize consumption and emissions.

At maximum acceleration the output of the electric motor and combustion engine combine to deliver up to 600Nm of torque but with engine speeds below 1500rpm.

Power storage and supply comes from double-layer capacitors or Super Caps, located in the vehicle sills. Offering over 10 times more capacity per kilogram than conventional nickel/metal hydride batteries, Super Caps have an overall capacity of 190kW.

The Concept X3 EfficientDynamics also combines BMW’s now familiar Valvetronic throttle with High Precision Injection technology — the first jet-guided direct injection system for large-scale production.