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DaimlerChrysler uses SCR to cut emissions for Euro-4

15th August 2002, Page 14
15th August 2002
Page 14
Page 14, 15th August 2002 — DaimlerChrysler uses SCR to cut emissions for Euro-4
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• by Robin Meczes DaimlerChrysler has announced it will meet Euro-4 exhaust emission regulations by adopting selective catalytic reduction (SCR) technology using urea as the reducing agent.

SCR technology, it says, enables the -eduction of nitrogen oxides and particuates to the required degree while also -eturning significantly improved fuel con

sumption figures. The system will depend on engines designed for low particulate emission via optimal combustion, with nitrogen oxides being reduced downstream in a catalytic converter.

DaimlerChrysler says the resulting fuel savings will be up to 6%. "As fuel costs account for some 30% of the lifecycle costs for a long-distance truck, this is a major benefit," comments Eckhard Cordes, mem tier of the board of management of the CV business division at DaimlerChrysler.

The firm also hopes to develop SCR technology to meet Euro-5 requirements being introduced in 2008. 'SCA is a technology that will enable us to adhere to future exhaust emission standards going beyond Euro-4 through a systematic process of further development, while at the same time optimising fuel consumption," says Cordes.

The decision to adopt SCR follows government-initiated field tests backed by the Bavarian ministry for state development and the environ ment in which ten DaimlerChrysler commercial vehicles were tested for distances of 140,000-290,000km apiece. No significant problems in operation were encountered.

A spokesman for DaimlerChrysler says no firm date has yet been set for the incorporation of SCR systems into the commercial product range. "It will be made available before the legal requirement comes in October 2005," he says.


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