Twin-scroll turbocharging
The new four-cylinder engines also feature twin-scroll turbocharging. This means that the exhaust stream from cylinders 1 and 4, and the exhaust stream from cylinders 2 and 3, follow separate spiral-shaped paths to the turbine wheel. This reduces exhaust back-pressure at low engine rpm, allowing the energy of the exhaust gas pulses to be utilised as efficiently as possible. The result is instant throttle response and fast-revving performance which BMW drivers can instantly translate into driving pleasure.
See also:
Measurement
Measurements are made by ultrasound sensors
in the bumpers.
The range is approx. 6 ft/2 m.
An acoustic warning is first given:
By the front* sensors and the two rear corner
sensors at appro ...
Features
The 2009 X3 starts at $39,700 and comes standard with leatherette upholstery,
eight-way power front seats, a panoramic moonroof and rain-sensing windshield
wipers. There are four option packages a ...
Malfunction
In the event of a malfunction, the steering wheel
must be turned further, while the vehicle responds
more sensitively to steering wheel
movements in the higher speed range.
The stability-enhanc ...
