diesel cars:
General Motors Corp.’s revolutionary new 4.5L V-8 Duramax turbo-diesel, which makes its debut in Chevrolet Silverado and GMC Sierra light duty trucks in the 2010 model year, is compact, powerful and fuel-efficient. The engine also is lighter, an important consideration in the competitive light truck market, because it was designed with more than 70 fewer parts.
The new dual-overhead cam, four-valve V-8 diesel engine boasts a number of innovative design approaches that have enabled its compact size and mass, including integral aluminum cylinder head exhaust manifolds, integral cam cover intake manifolds and a narrow V-angle block. The new V-8’s compact size enables it to fit within the same space of a small-block V-8 gasoline engine and offers GM the flexibility to introduce it in a wide variety of vehicles to meet market demand.
The new 4.5L V-8 diesel is expected to deliver more than 310 horsepower (231 kW) and 520 lb-ft of torque (705 Nm), while delivering a 25-percent engine fuel efficiency improvement versus comparable gasoline engines.
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Audi launched the TT Coupe 2.0 TDI quattro and TT Roadster 2.0 TDI quattro - the first series-production sports cars in the world to be powered by diesel engines.
The new two-liter, four-cylinder engine delivers dynamic thrust, with a power output of 170 hp and 258.15 lb-ft of torque. The TT Coupe quattro with the 2.0 TDI sprints from zero to 62.14 mph in only 7.5 seconds and achieves a top speed of 140.43 mph. The Audi TT Roadster, likewise featuring quattro permanent all‑wheel drive, takes just two-tenths of a second longer in the standard sprint discipline and has a top speed of 138.57 mph.
The Coupe consumes on average just 5.3 liters of fuel over 100 km (44.38 mpg), representing CO2 emissions of only 139 grams/km; the figure for the Roadster is 5.5 l/100 km (144 grams of CO2/km). Press release after the jump. >> read 2008 Audi TT TDI Picture Gallery .
Volkswagen announced today that the production version of the BlueTDI, a next-generation turbo diesel developed especially for the North American market will be available starting midyear. The Jetta BlueTDI will be one of the cleanest and most economic cars of its class in the world.
A key aspect in the development of the BlueTDI (2.0 litre engine displacement, 140 HP, 320 Nm) was the reduction of nitrogen oxide emissions (NOx); the American BIN5/LEV2 standards stipulate a nitrogen oxide limit of only 0.05 g/mile. The engineers in Wolfsburg met this limit and the general reduction of raw emissions by using internal engine modifications, some of which are unique worldwide, and implementing the maintenance-free NOx trap. >> read
BMW will launch the 3 series diesel (335d) and the X5d on the US market this October.Both models are getting BMW’s dual turbocharged 3.0L inline six diesel starting this fall. The 265-hp, 425-lb.ft. torque monster will make these vehicles among the most fuel-efficient and best performing vehicles in their class. The BMW 335d featuring Advanced Diesel with BluePerformance for maximum output of 265 hp and peak torque of 425 lb-ft. will provide a clear and convincing demonstration of these qualities. On the road, this means acceleration from 0–62 mph in 6.2 seconds and average fuel economy of 23/33 mpg (city/highway, provisional data). The BMW X5 xDrive35d offers sporting character through BMW Advanced Diesel with BluePerformance, while standing out as a high-torque Sports Activity Vehicle with excellent qualities for long-distance motoring. The BMW X5 xDrive35d accelerates from 0–62 mph in just 7.2 seconds and offers average fuel economy of at least 19/25 mpg (city/highway, provisional data). BMW will announced pricing in the next couple months.
The 2008 SAE World Congress will reveal for it’s visitors the new diesel- electric hybrid version of the Scorpio SUV. The announcement was made today by Mahindra&Mahindra, one of the leading automakers in the Indian market, which developed the diesel hybrid version with support from FEV, a leading producer of advanced powertrain and vehicles technologies. "The Scorpio vehicle is a clear indicator of the enormous implications of globalization on the changing paradigm in vehicle development. A rapid advancement of technology is occurring on a global scale, and our OEM customers are increasingly leveraging FEV’s global presence to ensure around- the-clock development of new powertrain and vehicle concepts”, said Mr. Gary Rogers, president and CEO of FEV. >> read
Who said cost can be a stop to anyone? Mercedes is preparing a huge near-future lineup of diesel, hybrids, Diesotto and, later, fuel cell cars. Even if GM said the cost for producing this kind of cars will be huge, Mercedes has another point of view: "I hear some competitors speculating that whatever it costs to meet the targets, that will be transferred to the customer. But since this is a legal requirement in order to sell the cars, the willingness of the customer to come up with the full bill will be limited. I consider the realistic definition for the pricetag is that the [customer’s] investment has a payback as a fuel saving during the first three or four years of the vehicle’s life." The Diesotto engine launched at the Frankfurt Motor Show in its F700 concept is making significant progress. It is composed of a suite of technologies, the last of which is its variable compression ratio, "which is the toughest step to execute, involving a lot of investment." Mercedes can get about 85 percent of the improvements without it in three to five years he says, with variable compression ratio seven years away. The S-class Bluetec hybrid will be launched in the next two years. It will be powered by a clean BlueTec diesel engine that is combined to a hybrid module and produces 299 horsepower allowing 0-62mph to come in at 7.3 seconds. 2008 Mercedes F700 Picture Gallery
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What better way to mark the 150th anniversary of Rudolf Diesel’s birth than a brand new generation of four-cylinder diesel engines from Mercedes-Benz which outstrip all previous benchmarks for performance, torque, emission properties and, most notably, fuel economy in their segment? In its most powerful variant, the new four-cylinder unit musters up 204 hp from its 2143 cubic centimetres, meaning that it delivers around 20 per cent more power than the engine it replaces.
At the same time, peak torque has risen from 400 Nm to 500 Nm, equating to an increase of 25 per cent. Despite the 25 kW increase in output, the new four-cylinder diesel burns substantially less fuel than its predecessor, which was itself highly economical. As a consequence, CO2 emissions are reduced by as much as 13 per cent and the new four-cylinder diesel unit already complies with the future EU5 emissions standard.
The new four-cylinder diesel generation from Mercedes-Benz can be briefly summed up as follows: greater power, greater economy, greater cleanliness. The new power unit from the Untertürkheim plant needs to be explained at greater length to be fully appreciated, however. It really does charter territory from which diesel engines - and four-cylinder units particularly so - have previously been excluded. It redefines standards for power output and torque on the one hand and for fuel consumption and exhaust emissions on the other, setting benchmark figures which no other comparable series-production engine is able to match at the current time.
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The first orders for the Audi Q7 V12 TDI quattro has already been placed, despite the fact that the car is not on sale yet. But the diesel SUV launched this year at the Geneva Motor Show comes with a very bad news: it will be priced around 180,000 euro (that’s around $283.000 - almost 5 times the price of the Audi Q7 4.2 Premium! - $58,600). Sales of the Q7 V12 TDI quattro will start by the end of the year. The Q7 V12 TDI quattro is powered by the world’s first V12 diesel engine that generates 500 hp of power and 1,000 Nm (757.56 lb-ft) of torque from six liters of displacement. It makes the 0 to 60 mph sprint in just 5.5 seconds while the top speed is electronically capped at 250 km/h (but on the speedometer, the range extends up to 310 km/h). 2008 Audi Q7 V12 TDI quattro Picture Gallery
Audi, the inventor of TDI, is preparing to launch a diesel offensive in the North American market. The brand with the four rings will introduce the world’s cleanest diesel to the U.S. market in early 2009, almost simultaneous with its introduction in Europe. The 3.0 TDI with its ultra low emission system, which fulfills the world’s most stringent emission standards, will first be offered in the Audi Q7 and then in the new Audi A4 at a later date.
The ultra low emission system ensures that the engine conforms with the limits included in the LEV II Bin 5 standards that apply in all 50 U.S. states. Engine features optimize the combustion process along with engine emissions, while a cleaning system reduces nitrogen oxide exhaust emissions by up to 90%.
The V12 TDI unleashes the kind of incredible power that also makes it a suitable engine for a supercar – Audi unveiled a concept car based on the R8 at the Detroit Auto show earlier this year. Again – in a mid engine configuration – the engine produces a whopping 500 hp and 737 lb/ft of torque, which is reached at only 1,750 rpm. In terms of design, the Audi R8 V12 TDI is reminiscent of the Audi R10, the two time winner of the Le Mans 24 hour race, and the engines are also close relatives.
2008 Audi R8 V12 TDI Picture Gallery
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BMW has announced plans to cease production of V8 diesel engines. The company says that six-cylinder versions offer better fuel efficiency and performance. Norbert Reithofer, BMW Chief Executive, told auto motor und sport magazine: "We have decided on a six-cylinder diesel with a twin turbo system. This engine has higher performance than a V8 and is more fuel efficient. Current eight-cylinder offerings will not be taken out of the line-up but new models will not be offered with this option. A replacement for this engine is unlikely." Reports also suggest that Mercedes is about to stop production of its diesel V8 engine for similar reasons.
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