Smart and powerful.
The straight six-cylinder petrol engine in the
BMW 135i.
In the BMW 135i, the Twin Turbo ensures a smoother power curve, and thanks to High Precision Injection power delivery is not only explosive, but also extremely efficient.
An impressive 225 kW (306 hp) propel the BMW 1 Series Convertible from 0 to 100
km/h in just 5.6 seconds.
High Precision Injection.
High Precision Injection, the innovative petrol direct injection system from BMW,
makes the combustion process more efficient. The engine delivers greater performance
and a significant reduction in fuel consumption.
High Precision Injection is part of BMW EfficientDynamics, BMW's package of innovations that unite dynamic performance
and fuel efficiency.
The core element of High Precision Injection technology is the piezo injector positioned
between the valves and the spark plug. Inside the injector are multiple layers of
piezo crystals which expand instantly when electricity is passed through them.
This forces a dose of the fuel/air mix out the injector needle and through the outlet
(which is no wider than a human hair) and into the combustion chamber under a pressure
of 200 bar. The cone-shaped cloud, the size of a thumb nail, is precisely injected
onto the spark and combusts with an excess of oxygen. In contrast to conventional
injection systems, BMW's High Precision Injection requires very little fuel and
eliminates the waste caused by unburned fuel being sprayed on the walls of the combustion
chamber.
Thanks to the piezo injectors, fuel can injected in just 0.14 milliseconds, making
it possible to introduce multiple injections of fuel within one single combustion
process. The high-performance, flexible electronic control system adjusts the timing
and dose of the injected fuel according to the engine power demand, operating temperature
and cylinder pressure. This ensures that combustion is precisely controlled, extremely
clean and outstandingly efficient combustion - in every driving situation.
BMW EfficientDynamics.
Extracting maximum driving pleasure from every drop of fuel: this is the aim of
BMW EfficientDynamics. With an array of intelligent technologies, BMW is able to
reduce fuel consumption and CO2 emissions while simultaneously enhancing your vehicle's
dynamic performance.
The array of leading-edge technologies that are part of the BMW EfficientDynamics
philosophy are as diverse as they are innovative. From new fuel combustion technologies
to lighter construction materials, low-friction components and improved aerodynamics
all the way to comprehensive and highly sophisticated energy management. However,
the aim of each of these innovations is the same: to deliver maximum driving pleasure
from a minimum of fuel.
To achieve this aim, new engines have been developed: petrol engines with lean-burn
technology and High Precision Injection. Diesel engines with third-generation common rail injection and light-weight
materials that lead to a 20 kg reduction in weight.
The Auto Start Stop Function and Brake Energy Regeneration make more of every drop of fuel. Improved aerodynamics
- such as the innovative air vent control - together with tyres with reduced rolling-resistance
and a range of efficiency-enhancing modifications to the drivetrain all lead to
the same result: more dynamic performance from less fuel.
How effective are these innovations? The figures speak for themselves: for every
100 km, the new BMW 120i (five-door) consumes one litre of fuel less than its predecessor,
yet it can sprint from zero to 100 km/h one second faster.
Diesel engines.
The small letter "d" in the BMW model names stands for a difference with big results:
every BMW diesel engine - whether four, six or eight cylinder - delivers refined
power and superb fuel efficiency.
The diesel engine transforms the chemical energy contained in the highly combustible
fuel, diesel, into mechanical energy, and it does so with excellent efficiency and
low emissions. It offers the advantages of lower fuel consumption, generous torque
at low engine speeds and a very long service life, especially when used for multiple
short trips.
BMW diesel engines combine the BMW characteristics of dynamic performance and sporting
agility with excellent smoothness and refined engine acoustics. The four-cylinder
diesel in the BMW 5 Series Sedan 520d, for example, produces a powerful 130 kW (177
hp) and 350 Nm of torque, while still offering exceptional fuel economy - just 5.1
litres for 100 km combined driving on average. Thanks to common rail injection technology,
its power development is smooth and refined.
As the top diesel model in the 5 Series, the BMW 535d possesses a six-cylinder diesel
powerplant that produces a mighty 210 kW (286 hp), making it the most powerful diesel
engine in its class. Immediately after leaving idle, the engine's Variable Twin
Turbo technology can effortlessly propel the 5 Series to its electronically-controlled
top speed of 250 km/h.
The most powerful BMW diesel engine at present is the 745d in the BMW 7 Series Sedan.
This V8 unit produces an enormous torque of 750 Nm at just 1,900 rpm. At 3,800 rpm,
it produces it maximum power output of 242 kW (330 hp).
Fuel consumption / CO2 emissions
Combined fuel consumption: from 5.1 to 9.0 l/100 km
Combined CO2 emissions: from 136 to 239 g/km
Further information about the official fuel consumption and the official specific
CO2 emissions for new passenger automobiles can be obtained from the "The Passenger
Car (Fuel Consumption and CO2 Emissions Information) Regulations", which are available
free of charge at all sales outlets and from this address: DAT Deutsche Automobil
Treuhand GmbH, Hellmuth-Hirth-Str. 1, 73760 Ostfildern-Scharnhausen, Germany.
Brake Energy Regeneration.
Make use of every Watt: by charging the battery only when your BMW is braking, coasting
or decelerating, Brake Energy Regeneration improves fuel efficiency by up to three
percent and ensures that the full power of your engine is available for acceleration.
Today's vehicles require much more electrical energy than older models, due to the
much wider array of electric and electronic on-board comfort and safety systems.
This energy is created by the generator (also known as the alternator) which converts
the engine's power output into electricity. In conventional systems, the generator
is permanently driven by a belt connected to the engine.
BMW's Brake Energy Regeneration operates differently: the generator is activated
only when you take your foot from the accelerator or apply the brake. The kinetic
energy that would otherwise go to waste is now used efficiently, converted into
electricity by the generator and stored in the battery.
Producing electricity in this highly efficient way delivers an additional advantage:
when you apply the accelerator, the generator is deactivated - so the full power
of the engine can be directed to the drive wheels. Brake Energy Efficiency thus
increases fuel efficiency while simultaneously enhancing driving dynamics. As a
safety precaution, the Brake Energy Regeneration system monitors the level of battery
charge and will, if necessary, continue to charge the battery even during acceleration
to prevent a complete discharging of the battery.