International Truck and Engine Corporation has awarded Tenneco a contract to supply exhaust after-treatment systems for its entire line of medium-duty diesel vehicles with International engines, launching in 2007.

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The contract is Tenneco’s first in North America for diesel emission control technologies for the medium-duty commercial vehicle segment.


Tenneco will provide International’s vehicles with complete exhaust after-treatment systems, including the diesel particulate filter (DPF) and the diesel oxidation catalyst (DOC). The new exhaust system also features an air gap pipe, designed to work together with other components to provide superior thermal efficiency and help improve fuel economy, and a new hanging system which utilizes expertise from the supplier’s Clevite Elastomer division.


Tenneco’s latest generation DPF system was designed using its proprietary computational fluid dynamics and particulate ash modelling CAE technologies. The DPF has an advanced modular design that allows for easy cleaning and service every 150,000 miles. This design allows service technicians to remove the DPF from the vehicle in less than 10 minutes, with a simple one-bolt removal system.


The development and engineering for International Truck and Engine Corporation is being done at Tenneco’s engineering centre in Grass Lake, Michigan and production will take place at its exhaust manufacturing facility in Seward, Nebraska.

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The deal with International continues the growth of Tenneco’s diesel particulate filter business, expected to be over 1.5 million units annually in 2007.


Tenneco’s first serial production of diesel emission control technologies in the commercial vehicle segment was last year’s launch of the DaimlerChrysler Actros in Europe.  The Actros had one of the first applications of integrating SCR (selective catalytic reduction) and exhaust silencing components in one unit for commercial vehicles.


Tenneco is also providing diesel after-treatment technology in North America for Ford, General Motors, DaimlerChrysler and others in support of the new 2007 EPA emissions regulations.