REDUCING CONSUMPTION.
WITH DRIVING PLEASURE.

BMW EfficientDynamics in the BMW 4 Series Coupé.

The BMW 4 Series Coupé has a comprehensive package of measures and technologies from BMW EfficientDynamics – for more driving pleasure with fewer emissions.

Aerodynamics.

The entire vehicle design is testament to the BMW EfficientDynamics philosophy. The optimised, aerodynamic front apron and undercarriage features innovative improvements that reduce air resistance and fuel consumption. The integrated Aero Curtain channels air through two vertical air inlets and along the front wheel arches. The accelerated air flow creates a kind of "curtain" on the outer side of the wheels. Then there are the Air Breathers, which channel the air flow at the front wheels. These innovative technologies reduce turbulence and air resistance, which in turn significantly reduces fuel consumption.
The flat undercarriage cover, which also shields the engine compartment, is an additional detail that greatly improves the car’s aerodynamics. These new trim elements are not only highly advantageous in terms of aerodynamics; they also improve sound insulation and provide greater protection from rust.

ECO PRO mode.

As soon as you switch to the ECO PRO mode, everything is geared towards greater efficiency and depending on your individual driving style, this results in a reduction in fuel consumption of up to 20 per cent (according to an internal BMW fuel consumption study). The additional functions of Route-Ahead Assistant and ECO PRO Route (both with Professional Multimedia Navigation system only) enable another five per cent of savings potential. This mode optimises accelerator and transmission response as well as shift points, and intelligently adapts the heating/air conditioning strategy. The Control Display shows you which EfficientDynamics technologies are currently lowering your fuel consumption. You’ll also receive ECO PRO tips that relate to your current driving situation to help you boost efficiency even further.

BMW TwinPower Turbo engines.

In petrol engines, BMW TwinPower Turbo technology combines a TwinScroll turbocharger with Valvetronic, Double-VANOS and High-precision direct injection. In diesel engines, it includes Common-rail direct injection and a turbocharger with variable turbine geometry. This significantly reduces the fuel consumption of petrol and diesel engines – while at the same time boosting power output across a wide range of engine speeds.

Auto Start-Stop.

Auto Start-Stop makes sure that fuel is only used when your car is actually driving. Whilst waiting at traffic lights or in stop-and-go traffic, Auto Start-Stop saves fuel by switching off the engine as soon as the car is idle and you have taken your foot off the clutch (manual transmission), or when you brake to a complete standstill (automatic transmission).
A signal in the Info Display indicates that Auto Stop-Start is active. As soon as you shift into gear (manual transmission) or take your foot off the brake (automatic transmission), the engine switches itself back on in a split second so you can continue driving without delay.

  • Safe and comfortable

    Auto Start-Stop never compromises driving comfort and safety, as it remains inactive if the engine has not reached its ideal running temperature, the interior has not yet been sufficiently heated/cooled, if the battery level is too low or you are turning the steering wheel. A central control unit restarts the engine if required, even when the car is at a standstill. For example, if the car starts to roll forward or if the windscreen becomes foggy. Auto Start-Stop can be switched off at any time with the push of a button.

Brake Energy Regeneration.

Every time you brake, kinetic energy is produced and until recently this energy went unused. Brake Energy Regeneration takes advantage of this long-overlooked potential. It harnesses the coasting energy generated by braking or when you take your foot off the accelerator, and turns it into electricity. This is then used to charge the car battery. The intelligent energy management system means that the alternator no longer needs to run permanently, which reduces the strain on the generator. The result is reduced fuel consumption and increased performance – classic BMW EfficientDynamics.

Optimum Shift Indicator.

Optimum, perfectly-timed gear changes can help save fuel, particularly in urban traffic and over long distances. The engine’s electronics system identifies the most efficient gear, based on road conditions and engine speed. An arrow lights up in the Info Display to show you when it would be more efficient to shift into a higher or lower gear. The system also recognises when you are accelerating fast and will delay its recommendation accordingly until the engine speed is back up. Comparative tests have shown that vehicles with the Optimum Shift Indicator use around four per cent less fuel.

Electric Power Steering.

The steering with electrical steering support provides an optimum feel. It is less sensitive to bumps, while active anti-roll damping reliably evens out oscillating movements. You can make the steering characteristics tighter at any time by selecting Sport mode.
Unlike conventional power steering, it doesn't use a hydraulic system but an intelligent solution based on an electric motor. The benefit is that the motor only operates when steering support is actually required - in other words when the steering wheel is moved. When driving straight ahead (which accounts for 90 per cent of any trip) it remains inactive and doesn't use up any energy at all. The result - the steering with electrical support reduces the average fuel consumption of the car by about 0.3 litres/100 kilometres compared to cars with hydraulic systems, making an important contribution to increasing efficiency. Since there is no hydraulic oil, maintenance and environmental pollution are also reduced.

  • Servotronic

    In all models Servotronic steering is standard. This permanently adjusts steering power to the car's speed. To do this, it calculates the support necessary for the speed measured, and the motor of the electrical steering support is supplied with power accordingly. When steering at low speeds, for example through narrow, winding alleys, only minimal force is required. As speed increases, however, the steering support required is reduced continuously so as to ensure more direct contact with the road and therefore optimum directional stability.

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