BMW 325I - BROCHRUE 2010 Wartungshandbuch PDF herunterladen (Seite 24)

Valvetronic

Instead of using a traditional throttle, Valvetronic technology in

the i and i xDrive lets the engine breathe more easily by

varying the lift height of the valves to regulate air intake. The

result: improved cold starts, smoother running, and a significant

drop in fuel consumption. Using revolutionary tech nology such

as this, BMW has improved its overall average fuel economy

more than any other manufacturer.

Double-VANOS

VANOS is BMW’s valve timing system that can “steplessly”

vary the points in the combustion cycle when valves open and

close. Double-VANOS refers to the fact that it operates on

both the intake and exhaust camshafts. Electronically controlled

in response to engine speed, load and temperature, VANOS

reduces emissions, and enhances low- to medium-speed

torque, as well as fuel efficiency. (Not available in d. )

Aerodynamics

The more smoothly that air flows over a vehicle,

the more efficiently it can operate. All BMWs are

designed for a low coefficient of aerodynamic

drag, which translates into quicker acceleration,

more stable handling, quieter operation and greater

fuel efficiency. A BMW’s integrated front spoilers

reduce the amount of air flowing underneath,

minimizing front-end lift. This allows a BMW to hug

the road at higher speeds for excellent stability.

Efficient transmissions

The  Series Sedans channel their

power through one of two -speed

transmissions: a smooth-shifting manual,

and an equally fuel-efficient STEPTRONIC

automatic. Recent refinements to the

automatic transmission include a torque

converter that slips less; quicker shifting;

and finer adaptation to driving style and

conditions. (d: STEPTRONIC automatic

transmission only.)

This is how much has gone in.

Lightweight construction

Our engineers use lightweight aluminum

throughout our vehicles – in the front section,

for example, or for the suspension. BMW’s

inline six-cylinder Advanced Turbo engine is

all aluminum; the naturally aspirated inline six

is an aluminum/magnesium composite – the

lightest in its class. Taken together, these

weight savings lead to lower fuel consump-

tion and better axle load distribution for more

agility – especially in curves.

Advanced Turbo engines

Benefiting from BMW’s Advanced Turbo

technology, the i, i xDrive and d

deliver quick acceleration while virtually

eliminating turbo lag. Fuel economy is

strong, as well, thanks to precise piezo

direct fuel injection.

Advanced Diesel with BluePerformance

The d Sedan benefits from the massive

power and extraordinary efficiency of BMW’s

Advanced Diesel engine, while meeting the

emissions standards of all  states, thanks

to its BluePerformance technology.

At BMW, we create dynamic vehicles that thrill you with quick acceleration, predictable handling and unshakable control. We are also busy

ﬁ nding ways to sustain this level of performance while incorporating innovative fuels and technologies to help preserve the environment.

This is what we refer to as “Efﬁ cientDynamics.” This goal has led to the visionary CleanEnergy hydrogen-powered engine, which is currently

used in the emission-free BMW Hydrogen  Sedan. BMW Advanced Diesel with BluePerformance, which offers diesel power with quick

acceleration, increased fuel efﬁ ciency and reduced emissions, was introduced to the U.S. in select models in , including the d.

In fact, every BMW on the road today comes standard with technology that boosts performance while simultaneously reducing fuel consump-

tion and CO



emissions.

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