Volkswagen to use CGI in diesels?

New technologies are finding their way into VW's modular diesel component system's future engine generation, according to the company’s chairman, speaking at the International Vienna Motor Symposium this week.

The VW chairman said these high-performance diesel engines will achieve peak power output of 100kW per litre of displacement and have a variable valve-train assembly, a high-pressure injection system at up to 3,000 bar and combined charging with the innovative e-booster.

This might suggest that VW is on the point of using compacted graphite iron (CGI) in its next generation diesel engines, most likely for cylinder blocks.

Professor. Dr. Martin Winterkorn, chairman of the board of management of Volkswagen AG, in giving a forecast of future drive system technologies, also revealed a new 10-speed dual clutch gearbox that reduces fuel consumption as well as the new 100kW/litre diesels. Among the alternative drive systems mentioned, plug-in hybrids in particular offer great potential.

Winterkorn stressed that over the medium and long-term different drive system technologies would exist side by side. These would range from highly efficient internal combustion engines and natural gas systems all the way to hybrids and electric vehicles.

On this basis, he said that the Volkswagen Group was working towards its declared objective of lowering the European new car fleet's CO₂ emission level to 95g of CO₂/km by 2020.

Winterkorn emphasised that existing internal combustion engines still offer a lot of potential.

“Since 2000, we have reduced the fuel consumption of our TDI and TSI engines by more than 30 per cent. I'm convinced that by 2020 we can achieve further increases in efficiency of around 15 per cent,” he claimed.

Factors making this possible, he said, would include enhancement of the combustion process, intelligent lightweight design, innovative operating strategies and optimisation of friction levels and thermal management.

Volkswagen also sees great potential for natural gas drive systems.

“The gas engine is environmentally friendly, economical and suitable for everyday use. The technology is fully developed and the vehicles are already on the market,” said Winterkorn. “The best example is the new eco-up! - at 79g of CO₂/km the world's most economical natural gas car. The Volkswagen Group will be systematically rolling out natural gas technology with the Golf TGI BlueMotion and the Audi A3 g-tron.”

Winterkorn added: “We need to make the public even more aware of the benefits of natural gas engines. Everyone needs to play their part in this: carmakers, politicians and the fuel industry.”

The variety of drive system technologies is growing: the group-wide Volkswagen modular component system and its flexible architecture enable every kind of drive system to be integrated quickly into the new models.

“Over the coming years we will electrify all vehicle classes in this way and help electrically powered motoring to make the breakthrough,” added Winterkorn.

In the medium term the first choice in terms of alternative drive systems is plug-in hybrid technology. This enables a purely electric range of up to 50 kilometres, a high level of suitability for everyday use by virtue of recharging from a socket at home and also complete flexibility for long journeys thanks to an efficient internal combustion engine.

The Volkswagen Group's first plug-in hybrids, the Porsche Panamera and Audi A3 e-tron, will shortly be going into full production. They will be followed by the Golf and many other models, such as the Passat, Audi A6 and Porsche Cayenne.               ∎