Turbo fuel-efficient

petak, 17.12.2010.

Turbo fuel-efficient

While high oil prices, as we too concerned about the way to look also on the hydrogen fuel cell, hybrid and other advanced technologies, the German mechanical engineers are still "conservative" in the traditional internal combustion engine to make a fuss. They are not stubborn, when the Germans applied sophisticated engine technology, the leading small-displacement engine with turbo technology, much as unexpected effect – caused by low fuel consumption of small displacement, turbo brings the sufficient power, the engine weight reduction effects caused by fuel-efficient is immediate.

Last year, the 62nd Frankfurt International Motor Show, Mercedes-Benz introduced a pilot model F700, which is a representative of the future Mercedes-Benz S-class luxury of new technology concept car. The geezer on the next cars, people's most surprising is not it a luxury configuration, nor is its leading security technology and control methods, but the first time to equip a pair of displacement Jin You 1.8L petrol engine. Luxury sedan configuration 1.8L engine? Pair of small-displacement engine and was able to output 235 horsepower, the equivalent of a S350 power, it is surprising that its fuel economy is close to 40mpg, 100 km fuel consumption is only 5.3L, while CO2 emissions are also considerable well, only the emissions per kilometer 127g, significantly lower than the existing most advanced internal combustion engine.

We know that low-speed diesel engines, big torque, while the petrol engine power high-speed high, DiesOtto engine is designed with variable compression ratio, low-speed diesel engines used similar methods of work with high compression ratio, high-speed Another question gasoline mode to run. Pair of Mercedes-Benz F700 engine is the paramount concern, how can 1.8L 4-cylinder 3.5L engine output power from conventional engines, but can keep a small displacement engine, fuel economy? The answer is the application of the turbo engine, Mercedes-Benz F700 is a dual turbo technology.

From the supercharger to the turbo

Most people think the role of turbocharger technology is to enhance power, indeed since the Saab to the technology from aviation to automotive applications, the turbo power is linked with the upgrade. The Mercedes-Benz has long been on the turbo technology is not a cold, has been supercharged stick to the line, in fact, supercharger and turbocharger has its drawbacks, supercharged power transfer can not take into account the high output, while the turbine by pressure in the low turn out is weak and lacks the smoothness of power output. Although the technology has to overcome these shortcomings, it is clear that the future of engine technology in addressing the shortcomings of turbo easier.

Thus began the development of Mercedes-Benz turbo engine, and now the new flagship Mercedes-Benz S600, SL600 is equipped with a 5.5L turbocharged V12 engine. Earlier this year, test drive Mercedes-Benz SL600 in the U.S., when faced AMG CEO Volker Mornhinweg, he almost invariably sense to us that: AMG decades has been indulging in engine technology, from supercharged to turbo; but if we another choice, so I think we will not stick to the road supercharger.

The Mercedes-Benz R & D department is responsible for high-level Thomas Weber told the media revealed that in the next two years time, that is the end of 2010, Mercedes-Benz cars will be fully into all the turbo technology. According to the requirements of the European Commission, European automakers have continued to improve the environmental performance of the engine, the car in 2012 from the 178g/km carbon emission reduction to 138g/km, if not meet this standard, the European Commission will be punished. The Mercedes-Benz to turbo technology to the attention of the unprecedented height, Thomas Weber clear: the future, more displacement is smaller, lighter, better fuel consumption and outstanding performance without compromising in the new engine, gradually adding the cars. Increase with a small displacement turbo fuel and technology to solve environmental problems, is the F700 concept car R & D ideas.

Obviously, turbocharged gasoline engine technology is the future that came out.

BMW also play turbo

If you are an advocate of naturally aspirated engines, turbo-charged and sent in a time when controversy, BMW is definitely your greatest argument. BMW diesel models in addition to its models are equipped with all of its naturally aspirated gasoline engine. BMW's decision to betray the naturally aspirated, but also had to do this, the potential for civil naturally aspirated engine has been completely excavated, though the BMW's engine power output is not worse than rivals, but also look for future power system way out.

Turbocharger turbine is the most unpleasant place to slow late, because there are some quality turbine, from the foot down to the turbine reaction step on board a short time, this power is usually of delayed impact drivers mood. The solution could be to create as small as the lighter the turbine, while BMW's approach is to use twin-turbo: the straight six engine, the two smaller turbochargers each supply compressed air for the three cylinder, rather than and then only with a large turbocharger compressed air supply to all cylinders at the same time. Dual turbochargers important advantage of the lower turbine inertia, even if the driver applied the gas pedal on a very small force, the engine can respond naturally aspirated performance closer.

The new inline 6-cylinder twin-turbo engine and power quite naturally aspirated 4.0-liter eight-cylinder engine than the light weight of about 70 kilograms. The addition of turbochargers to improve 3.0L straight six, 41 hp, while torque is 85 Nm to upgrade! Department of cars to BMW3 example: Twin Turbo models from 0 to 100 km / hour and more than half a second faster in the second high gear acceleration from 80 to 120 km / h was also significantly reduced, the most powerful The naturally aspirated model BMW 330i 8.2 seconds to complete this process takes, but this new model is now just 6.3 seconds.

Usually turbo engine displacement than the naturally aspirated engine with higher fuel consumption, BMW's solution is to use high-precision fuel injection technology and dual-turbocharged combination, this high-precision fuel injection system with power unit than the traditional turbo engine to reduce fuel consumption by about 10%. Moreover, this technique also the concept of lean burn direct injection provides a starting point, BMW's engineers can gain experience from which to successfully optimize the fuel consumption of other power systems.

Small-displacement turbo is the future trend

Volkswagen is the first small-displacement turbo-charged the practical depot, equipment in the GOLF GT's 1.4L supercharged engine, the first two-eat crab. With the help of turbo technology, this pair of displacement of only 1.4L engine maximum power output to 170 horsepower, torque is reached 240N? M, this is already a 2.4L naturally aspirated engine output.

The face of double-charging technology to bring high costs, the mass was removed this vice engine supercharger, turbo retained to develop lower-cost 1.4TSI engine. Despite the supercharger removed and lowered the compression ratio, but made the maximum power after the 1.4TSI still 96kW/5000rpm, when the rotational speed can reach 1600 ~ 3300 220N? M of maximum torque, the data is still higher than many 2.0L naturally aspirated engine, even better. Volkswagen has just held a "Green Olympics" campaign, announced in the domestic production 1.4TSI engine and DSG dual clutch transmission decisions, 1.4TSI and DSG gearbox will be made in next year's Super Proton (parameter configuration Gallery) above. In addition, POLO, Octavia (parameter configuration Gallery) and Sunny (parameter configuration Gallery) also have the opportunity to use this advanced engine.

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17.12.2010. u 05:26 • 0 Komentara • Print • #

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