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BMW officially announces new N54 Turbo Engine [Updated]

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BMW officially announces new N54 Turbo Engine [Updated]
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BMW officially announces new N54 Turbo Engine
Source: & BMW Group

BMW today released new details on its much-rumored N54 Bi-Turbo Engine. The motor is expected to appear in the 2007 BMW 335i and 2007 BMW 335ci (coupe). The engine has an output of 306 horsepower and maximum torque of 295 lbs.-ft (400 Nm). BMW said it has already tested a 3-Series sedan with the engine, and achieved a 0-62mph time of 5.7 seconds. BMW said the engine is relatively lightweight — about 70kg less than its 4.0-liter V8 engine. According to the automaker, the 3.0-liter engine has little or no turbo lag, thanks to two small turbos instead of one large one. Maximum torque is achieved between 1500 and 5800 rpm.


What is known so far: BMW will show its new e92 3-Series coupe at the Geneva Motor Show along with this new engine. What's no entirely clear is whether this engine will make it to North America. Recent rumors suggested this turbo engine would be exclusive to Europe, and a different naturally-aspirated powerplant would drive the 335 in North America.

More information from BMW Group
A new top-of-the-range power unit featuring biturbo technology and direct gasoline injection will mark the highlight of BMW’s six-cylin­der engine family in future. Developing maximum output of 225 kW/306 hp and peak torque of 400 Newton-metres or 295 lb-ft, this highly innovative new engine fulfils the greatest demands also in terms of spontaneous and superior power. As the first straight-six with biturbo technology, high-precision fuel injection and an all-aluminium crankcase, this new highlight in engine technology offers a standard of responsiveness never seen before with a turbocharged engine as well as superior torque and pulling force all the way to the engine’s highest speeds. And at the same time this new turbo­charged power unit comes with the supreme smoothness and refine­ment so characteristic of BMW’s straight-six engines.
The particular efficiency and all-round economy combined with this supreme output and performance is attributable to BMW’s high-pre­cision fuel injection, the latest generation of direct gasoline injection by BMW making a significant contribution to the all-round economy of this trendsetting engine.
So now, introducing this combination, BMW’s engineers are writing a new and particularly attractive chap­ter in the history of turbocharged power units 100 years after the in­vention of the turbocharged engine.

Proven foundation: the straight-six power unit.
Introducing this new turbocharger technology, BMW is meeting the demand for extra power in both a thrilling and highly efficient manner. Particularly with the concept chosen by BMW, turbocharger technol­ogy is simply ideal to maintain the proven drive qualities of the engine and open up new highlights. The foundation for all this is laid by BMW’s current generation of straight-six power units displacing 3.0 litres and developing maximum output of 195 kW/265 hp and thus offering a potential quite outstanding for a normal aspiration engine. Now, to generate even more power and, in particular, torque, BMW is adding biturbo technology to this excellent starting point. Compared with the proven 3.0-litre normal aspiration engine, biturbo technol­ogy increases overall output by approximately 15 and peak torque by an even more impressive 30 per cent.
The result is clear: maximum output of 225 kW/306 hp and peak torque of 400 Newton-metres or 295 lb-ft. which, on the road, means outstanding thrust and driving power all the way up from low engine speeds. And what this means in practice BMW’s engine development specialists have already calculated, taking the BMW 3 Series Sedan as an example: The biturbo version would accelerate from 0–100 km/h more than half a second faster, with acceleration from 80–120 km/h (50–75 mph) in the second-highest gear improving from 8.2 seconds in the most powerful normal-aspiration version, the BMW 330i, to just 6.3 seconds in such a new model.
The only way to achieve such an increase in power and performance with a normal-aspiration engine would be to significantly increase engine size, which would also mean a corresponding increase in weight and corresponding effects on the car’s overall balance.
By contrast, the combination of turbocharger technology with high-precision gasoline injection is a particularly efficient way to meet even greater demands in terms of output and torque. And for compa­rison, the new straight-six biturbo weighs about 70 kilos or 158 lb less than an approximately equally powerful eight-cylinder normal-aspiration engine displacing 4.0 litres. A further essential point is that the power unit equipped with high-precision fuel injection offers about 10 per cent lower fuel consumption than an equally powerful turbocharged engine with manifold injection.
Apart from its low weight and fuel economy quite superior in its class, the new biturbo is able to offer yet another particular quality feature so typical of a BMW straight-six: This is supreme smoothness and refinement, precisely the virtue which has made BMW’s straight-six power units the benchmark for refined drive technology acknowl­edged the world over. Indeed, right from the start the specific ar­range­ment of the cylinders gives the engine perfect balance in terms of free mass forces, avoiding vibrations even at high engine speeds. A further important point is that this turbocharged version of BMW’s six-cylinder comes with the same extra-light camshafts as on the normal aspiration engine, variable, double- VANOS camshaft adjust­ment, as well as an electrically driven coolant pump operating only as required (that is as a function of current cooling requirements).
The turbo “gap” – a thing of the past .
Developing this highly innovative power unit, BMW’s engineers have also succeeded in eliminating the former disadvantages of turbo­charged engines attributable to their concept and design principle. Hence, BMW’s new turbocharged six-cylinder is absolutely free of some not so desirable characteristics so typical of turbocharged engines to this very day:
There is not the slightest delay in the deve­lopment of power and thrust, and at the same time the engine does not have the same high fuel consumption as a conventional turbo­charged power unit.
Particularly the biturbo concept ensures a significant improvement of spontaneous power, two smaller turbochargers each supplying three cylinders with compressed air, instead of just one big turbocharger for all cylinders together. An essential advantage of these turbo­chargers is their lower inertia, even the slightest pressure exerted by the driver on the gas pedal leading to an immediate surge of power and performance. In other words, the turbo “gap” so typical of turbo­charged engines so far – the time-lag until the turbocharger starts to build up power – is no longer perceptible. On the road, therefore, this new turbocharged engine has virtually the same power and perform­ance characteristics as a much larger normal-aspiration power unit: The 3.0-litre develops its impressive torque of 400 Newton-metres or 295 lb-ft without any noticeable delay consistently all the way from 1,500–5,800 rpm. And from there the engine continues to rev up smoothly all the way to 7,000 rpm,
offering the driver a particularly superior standard of dynamic performance for accelerating all-out in superior, relaxed style.

Double progress: high power, high efficiency.
To combine a fascinating driving experience with up-to-date fuel econ­omy, BMW has developed the world’s first straight-six gasoline engine with biturbo technology, direct gasoline injection, and an all-aluminium crankcase.
From the start, the turbochargers make an im­portant contribution to the reduction of fuel consumption, with the turbines made of high heat-resistant special steel withstanding tem­peratures of up to 1,050 °C or 1,920 °F and therefore not requiring the cooling effect of extra air flow. Particularly under full load, this means a significant decrease in fuel consumption.
The key function serving to maximise fuel economy is however BMW’s high-precision fuel injection. Indeed, this new generation of direct fuel injection technology fulfils all expectations made in prac­tice in terms of superior economy, without making any concessions in terms of dynamic performance and driving qualities. High-precision fuel injection allows even more exact dosage of fuel as well as a high­er compression ratio – ideal conditions for increasing engine effici­ency and significantly reducing fuel consumption.
All this is made possible by the central position of the piezo-injector between the valves. Fitted in this position, the innovative injector open­ing to the outside is able to distribute fuel in a conical burst en­suring particularly smooth distribution of fuel within the combustion chamber.
Developing this new straight-six with biturbo technology, BMW is opening up a new chapter with an engine principle basically quite old: Only recently, the turbocharged engine celebrated its 100th anniver­sary, with turbocharger technology registered for a patent by Swiss engineer Alfred Büchi in November 1905 having played a significant role for decades particularly in boosting the output of marine and air­craft engines. It was only much later that manufacturers started build­ing cars with turbocharger technology, the first production car to fea­ture this technology in Europe being the BMW 2002 turbo back in 1973.

BMW – the first turbocharged world champion in the history of Formula 1.
Throughout 100 years of turbocharger history, BMW has set impor­tant milestones time and again: As early as in the late 1960s BMW became the first manufacturer to use turbocharged engines in touring car racing.
And in 1983 a BMW Brabham driven by Brazilian racing driver Nelson Piquet became the first turbocharged F1 to win the Formula 1 World Championship, BMW’s engine specialists succeed­ing even back then to extract far more than 1,000 horsepower from an engine displacing just 1.5 litres. Ultimately, however, it was precisely this almost unlimited option to boost engine output by means of tur­bo­charger technology which led to the decision in the highest realms of motorsport not to boost engine power any further.
In series production, on the other hand, all turbocharger concepts used so far have always had the unpleasant side-effect of increased fuel consumption – and indeed, this conflict of interests appeared insurmountable for a long time. Only the latest developments in engine technology have opened up the door to the new approach BMW is now following consistently, combining turbocharger tech­nology with high-precision fuel injection as the ideal concept for efficient dynamics in particularly fascinating style.
Now the new high-performance power unit marking the pinnacle of BMW’s straight-six engines impressively proves the fascinating po­tential of this concept and its most important components. With its superior responsiveness and equally outstanding pulling force, the new engine soon reaching the standard for series production opens up brand-new dimensions in driving dynamics.
Indeed, BMW’s engine development specialists even have further options and concepts in view for this engine and its technology: Over and above the drivetrain conceived and built for supreme dynamics, this technology provides the starting point for a lean-burn direct in­jection concept and thus serves to successfully optimise fuel con­sumption also in other performance classes. In this way BMW is once again proving its competence in engine construction, developing modern, up-to-date drive concepts and at the same time enhancing that sheer driving pleasure of BMW to an even higher standard.

Last Updated on Wednesday, 22 February 2006 01:25  

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