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2011 BMW Z4

2011 BMW Z4

2011 BMW Z4

2011 BMW Z4

High Precision Injection: the efficient way to supreme performance.

The BMW Z4 sDrive35is offers its outstanding power and performance consistently at all times. But this does not mean an increase in fuel consumption and emissions. On the contrary – averaging fuel consumption of 9.0 litres/100 kilometres (equal to 26.1 mpg ÚS) and CO2 emissions of 210 grams per kilometre in the EÚ test cycle, the new top model offers the same superiority also in this respect as the BMW Z4 sDrive35i with Sport Automatic.

This unusually good balance of performance and fuel consumption results from the fundamental design and layout of the six-cylinder combining BMW Twin Turbo Technology with High Precision Injection. So once again, the qualities of direct gasoline injection featured in this engine come out very clearly, piezo-injectors positioned in the cylinder head between the valves and therefore in the immediate vicinity of the spark plugs ensuring particularly precise dosage of fuel and a clean combustion process.

Opening up to the outside, the injectors operate at a pressure of up to 200 bar, distributing fuel in a conical spray pattern throughout the entire combustion chamber. A further advantage of such direct fuel injection is the cooling effect allowing higher compression and making the combustion process even more efficient.

Through their concept alone, the turbochargers likewise help to reduce fuel consumption. Since the turbines are made of special steel particularly resistant to high temperatures and therefore able to cope with temperatures of more than 1,000° C or 1,830° F, there is no need for an increased fuel supply with its cooling effect. Particularly under full load, this ensures a significant advantagein fuel economy.

Further technologies offered as standard by BMW EfficientDynamics such as Brake Energy Regeneration, EPS Electric Power Steering and on-demand control and management of ancillary units likewise help to reduce both fuel consumption and emissions.

Characteristic engine sound accompanying the dynamic surge of power.
The modified six-cylinder also comes with special features on the engine block itself in the interest of even greater strength and stiffness. The exhaust system of the BMW Z4 sDrive35is, in turn, has been developed specifically for this model, appropriate sound engineering giving the car a very characteristic and truly impressive sound pattern.

This particular distinction tailored to the BMW Z4 sDrive35is is ensured by special sound flaps and modifications on the silencers. The driver and passenger therefore experience powerful acoustic feedback to their wish for performance, without the sound of the engine becoming obtrusive, let alone annoying, at any time. So the sound experience is characterised by a particularly deep rumble with the focus above all on the low frequency range.

Source: conceptcarz

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