Bericht
door Snipe » 10 dec 2010, 12:49
Dit zegt BMW zelf over de motor:
In-line 6-cylinder engine with M TwinPower Turbo and engine- speed-related performance characteristics.
An in-line 6-cylinder engine with outstanding performance, sensational free- revving properties and long-lasting thrust provides the BMW 1 Series M Coupe with its power source for delivering supreme driving dynamics. The 3.0-litre power unit combines hallmark M performance characteristics with contemporary efficiency. It has been modified in M style so as to be able to handle the requirements of both everyday traffic and the race track. The result: with an engine output of 250 kW/340 bhp, the BMW 1 Series M Coupe achieves almost exactly the level of the third- generation BMW M3, while in terms of driving dynamics this compact, top- flight athlete is clearly superior to the latter model, which was replaced just a few years ago.
The M TwinPower Turbo Technology used in the BMW 1 Series M Coupe consists of two relatively small superchargers which, because of their low inertia moment, are active even at low engine speeds, each providing three cylinders with compressed air. This results in an unusually spontaneous level of responsiveness. The drivetrain provides its maximum torque of 450 newton metres at as little as 1500 rpm. This is available up into the 4500 rpm range and can be increased by another 50 newton metres in full throttle by means of an overboost function. The maximum level of 500 newton metres permits highly dynamic acceleration manoeuvres, and the forward thrust once again available after each gearshift makes for a linear speed increase typical of M vehicles. The engine reaches its maximum output at 5,980 rpm. With this engine-speed-related performance curve, the 6-cylinder power unit embodies the characteristic M properties of a high-performance engine: the BMW 1 Series M Coupe spurts in just 4.9 seconds from standing to
100 km/h, and the urge to accelerate is limited at 250 km/h by means of intervention in the engine control system.
The cooling system of the power unit is designed to enable it to do justice both to its outstanding performance potential and to the particularly high demands of constantly drawing on maximum power output. An additional separate radiator and a specific air duct deal with the increased thermal stress which can be generated by driving in a particularly sporty style on the race track.
The engine's outstanding efficiency is mainly due to direct injection which allows for high-precision fuel supply by means of piezo injectors placed centrally between the valves. In addition, Efficient Dynamics measures such as brake energy regeneration and needs-based control of auxiliary units ensure that the average fuel consumption on the EU test cycle is limited to 9.6 litres per 100 kilometres and CO2 emissions to 224 grams per kilometre.
The transmission of propulsion power in the BMW 1 Series M Coupe is taken care of by a 6-speed manual transmission. This newly developed transmission is operated using a very short M gearshift lever.
@Marcel: die Z4 zal wel sneller zijn omdat die geen handbak heeft.
