BMW 118 CABRIOLET BROCHURE 2009, Брошюра, Страница: 7 / 24

This has gone in.
High Precision Injection
In this cutting-edge generation of petrol
direct injection, the Piezo injectors are
positioned very close to the spark plugs.
They inject the fuel at high pressure and
with extreme precision. With the four-cylinder
models, the injectors’ central positioning
means only part of the combustion chamber
needs to be fi lled with an ignitable petrol-air
mixture. The engine can then run “leanly” and
so effi ciently, precisely in the heavily used
moderate load range. Auto Start/Stop function
BMW four-cylinder engines with 6-speed
manual transmission automatically shut down
when the vehicle is stationary, for example
at a red light or in a jam, when the driver
activates the clutch and switches to neutral.
The engine restarts as soon as the clutch is
activated again. This innovation signifi cantly
reduces fuel consumption especially in
city traffi c.
Brake Energy Regeneration
To supply a battery with electrical energy,
the generator (alternator) is permanently
driven using engine power, which demands
additional fuel consumption. Brake Energy
Regeneration means the generator
usually only generates electricity when the
driver takes the foot off the accelerator or the
brake – previously unused kinetic energy is
transformed in coasting mode into electrical
energy before being fed into the battery.
In this way, electricity is generated while
coasting, without consuming fuel.
Some BMW EfficientDynamics features are dependent on the
car’s equipment and are not available for all model variants.
Your BMW partner will be happy to provide you with information
on all equipment details.
Tyres with reduced rolling-resistance
While driving, tyres are constantly changing
shape. This uses up energy and thus fuel.
Tyres with reduced rolling-resistance have an
improved design and use special materials for
their road treads and side walls, reducing
deformation. Electric Power Steering
In comparison with conventional, hydraulic
steering systems, the electrical steering only
uses energy during actual steering. When the
steering wheel position is constant – for
example, at high speed along the motorway –
the electric motor is inactive.
Optimum Shift Indicator
Timely gear shifts are one of the most effective
and easiest ways to save fuel. This is where the
Optimum Shift Indicator, in conjunction with
6-speed manual transmission, comes in. It
shows the driver what gear to use in order to
drive more effi ciently.
The pleasure you get from driving a BMW is the result of fi ne engineering – always setting the benchmark because it is based on much more
than engine power. This is the tradition behind BMW Effi cientDynamics. It includes the visionary Hydrogen engine, already used in a number of
completely emission-free BMW 7 Series Saloons. Also going into production soon is the BMW ActiveHybrid – an intelligent, demand-oriented
combination of internal combustion engine and electric motor. And every BMW already includes a multi-award-winning BMW Effi cientDynamics
technology package as standard that boosts dynamics even further while simultaneously reducing fuel consumption and CO
2
emissions.
And this is what comes out.
BMW already offers 24 models with CO
2
emissions of 140 g/km and signifi cantly less.
But that’s just for starters. We’re carrying on
our research with Effi cientDynamics – in the
quest to bring you more driving pleasure
and less emissions.
BMW Effi cientDynamics
Less emissions. More driving pleasure.