The A4 represents a radical technological advance for audi.

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The A4 represents a radical technological advance for audi.

Audi’s new A4 represents a redesign that looks like a leg space, with some interesting techniques – but the launch model just gives you something to do. Next year, audi will introduce the Q7 hybrid model into mass production, and the company will extend its hybrid model to other models, including the A4. The Metroproject quattro design, revealed at the Tokyo motor show, is a hybrid drivetrain.

Other companies are eager to develop hybrid cars with large compact cars. In Tokyo, Honda unveiled plans for a “affordable” global hybrid of four vehicles, expected to go into production in 2009.

Although the gasoline electric power system leads the mass application, the diesel electric power solution also receives the attention. Volkswagen is developing a diesel-electric hybrid that, despite the technical costs, looks likely to be mass-produced.

Although some form of hybrid driven, it is usual for the enterprise (especially for the sake of public relations image), adopt efficient diesel engines continue to provide a convincing answer demand for CO 2 emissions, especially for high performance cars.

For companies such as audi or problem mercedes-benz, which is highly valued for their green credentials, it is a highly high-performance gasoline-powered car with a large amount of CO 2 emissions.

Volkswagen group powertrain development director Wolfgang hartz (Wolfgang Hatz), said he had not experienced the public 4.2 litres of 309 kw (414 HP) audi R8 negative attitude and the speed of the car up to 301 km/h (187 MPH), and generate CO 2 emissions of 325 g/km. But he realised that in an increasingly environmentally conscious society, alternative low-emission power units would be attractive.

Does this mean high performance hybrid R8? Mr Hartz was cautious in his reply: “I believe more in diesel than in hybrid diesel, but in diesel engines. R8 diesel engine is my dream; We have to do power and ‘green’. ”

The choice of engine may be wide. Audi currently produces the strongest V8 diesel engine in 4.2 liters, with a yield of 257 kilowatts (345 horsepower) and 439 nm (324 LBS.). And the audi diesel tracks are a new V12 Q7, 1000 N·m (738 pounds · feet). Could it be crammed into R8? Audi neither confirmed nor denied.

Vw also has a CCS research engine. It USES diesel fuel, combined with gasoline and diesel combustion systems, but burns biofuels./Mr Hartz does not see the technology as a substitute for petrol or diesel engines, but thinks it is more likely to become the third engine production line when it enters mass production. But that may not happen for ten years.

Hatz believes the world’s car population is about 700 million, with an annual output of 60 million vehicles, and new technology could take 40 years or more to fully introduce global markets. “But we learned something very interesting from CCS,” he said. “For example, the cylinder pressure is controlled by the sensor in the cylinder, and HCCI is used in diesel mode. Our engine emissions are very low and there is almost no NOx. We have to develop self-cleaning combustion systems – no big filters. “

Although Volkswagen group in terms of fuel cells work continues, but just as many automobile industry technology development leader, hartz cautious about its prospects, at least in the 20 years after any period will appear.

Efficient, low-emission hydrogen production is still a key issue, he said. Nuclear power is the current possible production route; However, the mass production of highly efficient hydrogen could still be 20 to 30 years away.

“The most pressing strategic issue right now is the further development of battery technology,” hartz said. The whole electric car makes more sense than a hybrid or a fuel cell. However, we must reach the required battery technology level as soon as possible – less than 20 years, of course – although the internal combustion engine will still be used in a variety of ways, burning all kinds of fuel. “

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