Elasticity meets torque.
The six-cylinder inline petrol engine
in the BMW X6 xDrive35i.
The 3-litre straight six-cylinder petrol engine with High Precision Injection and Twin Turbo technology combines the typical elasticity of a BMW six-cylinder petrol engine with equally impressive amounts of torque. With 400 Nm available from just 1,300 rpm upwards and a power output of 225 kW (306 hp), this engine is one of the most powerful in its class. And with a fuel consumption of just 10.9 l/100 km (EU composite figure), it’s also extremely efficient.
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.