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Clean Diesel Technologies, Inc. Licenses Its Patented Emission Control Technology to Tenneco


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STAMFORD, CT - September 24, 2007: Clean Diesel Technologies, Inc., a global company providing innovative technologies and solutions that reduce emissions, conserve fuel and improve engine performance, announced today that it has signed a worldwide, non-exclusive licensing agreement with Tenneco , a $4.7-billion company that designs, manufactures and markets emission control and ride control products and systems for the automotive original equipment market and the aftermarket. Under the terms of the latest agreement, Clean Diesel will receive upfront fees and per-unit royalties. Tenneco also acquired from Clean Diesel the assignment of a license for mobile retrofit emission control applications in on-road and off-road vehicles, and for other markets including railroad and marine.

These license agreements which Tenneco entered into in connection with its recent acquisition of the mobile emissions business of Combustion Components Associates, Inc. (CCA) - cover mobile applications for Clean Diesels ARIS® airless reagent injection system and technology, which controls nitrogen oxides (NOx) emissions through selective catalytic reduction (SCR), and the related suite of Clean Diesel patents. The licenses also include applications for hydrocarbon injection for lean NOx traps and for other NOx adsorbers and catalysts, as well as for diesel particulate filter regeneration. The new agreement licenses Tenneco to work with Original Equipment Manufacturers (OEMs) and to serve as the Tier One supplier and systems integrator for emissions solutions, combining Tennecos proprietary products and technologies with ARIS. The suite of licensed patents includes Clean Diesels exhaust gas recirculation (EGR) technique used in combination with SCR to minimize engine emissions while simultaneously improving fuel efficiency.

This agreement is another indication that Clean Diesels patented technology is gaining steady traction in the global marketplace. We will continue to offer highly synergistic licensing opportunities with innovative industry leaders such as Tenneco, said Bernhard Steiner, President and CEO of Clean Diesel. This agreement with Tenneco is part of a series of global licensing agreements executed this year for the Companys technologies. As the world looks to apply new solutions that will control oxides of nitrogen, particulate matter and carbon dioxide emissions, while also reducing fossil fuel consumption, it will be the wide scale deployment and adoption of patented platform technologies like ours that will make a real impact.

About Clean Diesel Technologies

Clean Diesel Technologies, Inc., together with its wholly-owned subsidiary, Clean Diesel International, LLC, is a clean energy and environmental technology company that provides innovative solutions to reduce harmful engine emissions and conserve energy. Clean Diesel Technologies patented technologies, products and solutions enable cost-effective reduction of harmful emissions from internal combustion engines while also improving fuel economy and power. Products include Platinum Plus® fuel-borne catalysts, the Platinum Plus Purifier Systems, the ARIS® urea injection systems for selective catalytic reduction of NOx, diesel particulate filter and biofuels technologies. Their products are in commercial use around the world. Platinum Plus and ARIS are registered trademarks of Clean Diesel Technologies, Inc. For more information, visit Clean Diesel at www.cdti.com or contact the Company directly.