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Four-cylinder petrol engine.
How much energy do you use during sport? 6.4 litres per 100 km in the new BMW 120i in accordance with the EU norm. Thanks to continual engine optimisation as part of the BMW EfficientDynamics concept, BMW drivers are now leading the way when it comes to economy. In the blink of an eye, High Precision Injection ensures that no less than 200 injections are supplied - just one of the numerous BMW EfficientDynamics innovations that helps significantly reduce fuel consumption and emission levels.
More efficient driving starts with the brakes.
BMW EfficientDynamics leads the way into the future with its Brake Energy Regeneration concept. As soon as you take your foot off the accelerator or you brake, the generator transforms the vehicle’s kinetic energy into electricity and uses this power to charge the battery. As a result, the battery’s reliance on the engine is reduced - and so is fuel consumption.
It pays to listen to recommendations.
Changing gear at the right time can result in significant fuel savings. In the 1 Series models with a six-speed manual transmission for example, the gear shift indicator conveniently displays which gear you should select to increase fuel efficiency in your direct line of vision. Depending on your driving style, the system gives recommendations on how to go up and down the gears more effectively.
Attention to detail.
Normal tyres are constantly flexed during use, which costs energy and therefore fuel. Tyres with reduced rolling resistance employ special materials in the tread and side sections which reduce flexing and consequently fuel consumption - on every straight and in every bend.
A turn for the better.
To give you more bends per litre, an electric motor is used to assist the steering. Unlike conventional hydraulic systems, Electric Power Steering is supported by an electric motor which helps to ensure that energy is only used during actual steering manoeuvres. If the steering wheel is kept in a constant position when driving straight ahead or cornering, the electric motor is inactive and therefore does not use any energy.
Open to increased efficiency.
A constant airflow through the radiator increases air resistance and affects aerodynamics. In the BMW 1 Series, electrically controlled vents in front of the radiator open and close the cooling air inlets so that the vents are only opened if cooling air is required. When the vents are closed, air resistance is reduced, as is fuel consumption.
Four-cylinder diesel engine.
A good example of how BMW EfficientDynamics can help continually improve engine performance is the new four-cylinder diesel engines. The engine block is made of aluminium and offers optimised combustion chamber geometry while the third-generation common rail fuel injection system introduces the diesel into the combustion chamber at remarkably high pressure - up to 1,600 bar - and with outstanding precision, using state-of-the-art piezo injection technology. The sum of these technologies is what makes the notable difference: significantly reduced CO2 emissions of 123 g/km (for the BMW 118d with manual transmission) to 145 g/km (for the BMW 120d with automatic transmission) yet higher performance levels. Both engines are fitted with a diesel particle filter as standard and comply with EU4 emissions regulations.
BMW EfficientDynamics.
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