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REDUCING CONSUMPTION. WITH 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 feature innovative improvements that reduce air resistance and fuel consumption.
The front apron is a prominent design feature that embodies the BMW EfficientDynamics philosophy. The integrated Air 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 is the Air Breather, 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. This 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). Another five per cent can be saved by the additional functions of coasting (only with Steptronic transmission), preview assistant and ECP PRO Route. 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.
Another feature of the ECO PRO mode is the coasting function in combination with the Steptronic transmission: If no driving power is required within a speed range of 50 km/h to 160 km/h, the system disconnects the engine and the car coasts.
Preview assistant
The preview assistant in conjunction with Navigation System Professional is an especially innovative highlight of ECO PRO mode. Based on navigation data, it detects bends, built-up areas, roundabouts, T junctions, speed limits and motorway exits along the route and is able to give you tips in advance to enable you to reduce speed early on.
ECO PRO Route
ECO PRO mode also includes ECO PRO Route which combines with the new generation of Navigation System Professional to draw on various parameters such as individual driving style as well as the current traffic situation and road conditions to calculate the most fuel-efficient route. The on-board computer displays your bonus mileage, in other words how many additional kilometres you have gained from using ECO PRO mode.
BMW TWINPOWER TURBO ENGINES.
In petrol engines, BMW TwinPower Turbo technology combines a TwinScroll turbocharger with Valvetronic, Double-VANOS and High Precision Injection. In diesel engines, it includes Common Rail direct injection and a turbocharger with variable turbine geometry. In this way, BMW TwinPower Turbo 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.
AUTOMATIC START/STOP FUNCTION.
The Automatic Start/Stop function makes sure that fuel is only used when your car is actually driving. Whilst waiting at traffic lights or in stop-and-go traffic, the Automatic Start/Stop function takes to save fuel by switching off the engine as soon as the car is idling and you have taken your foot off the clutch (manual transmission), or when you brake to a complete standstill (Steptronic transmission).
A signal in the Info Display indicates that the Automatic Stop/Start function is active. As soon as you shift into gear (manual transmission) or take your foot off the brake (Steptronic transmission), the engine switches itself back on in a split second so you can continue driving without delay.
Safe and comfortable
The Automatic Start/Stop function 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 if 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. The Auto Start-Stop function can be switched off at any time with the push of a button.
BRAKE ENERGY REGENERATION.
Reduces fuel consumption.
Every time you brake, kinetic energy is generated and until recently this energy went unused. Brake Energy Regeneration takes advantage of this long-overlooked potential. It harnesses the coasting energy that is generated whenever you brake or take your foot off the accelerator and turns it into electricity. This electricity 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.
Most efficient gear.
Optimum, perfectly-timed gear changes can help save fuel, particularly in urban traffic and over long distances. Optimum gear changes, less fuel consumption – 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. In manual shifting mode, drivers with a Steptronic transmission also receive relevant shifting suggestions. 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 steering 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 using the optional sport switch.
Unlike conventional power steering, the steering with electrical support doesn't use a hydraulic system but an intelligent solution based on an electric motor. The benefit: 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, statistically speaking - 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 as 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 some models you can combine the steering system with Servotronic. 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.