Clean Diesel Signs Distribution Agreement With Cummins For Fuel-Borne Catalyst To Improve Diesel Exhaust Controls

STAMFORD, CONNECTICUT Sept. 2, 2005; CCN Mathewes reported that Clean Diesel Technologies, Inc. (EBB:CDTI)(AIM:CDT)(AIM:CDTS), a developer of chemical and technological solutions to reduce harmful engine emissions, announced that it has signed a blending and distribution agreement with Fleetguard, Inc., a business unit of Cummins Inc. (CMI), for the sale of Platinum Plus® Fuel-Borne Catalyst (FBC) in North America and international markets.

Under the terms of the agreement, Fleetguard will purchase Platinum Plus FBC concentrate from Clean Diesel for blending into finished products for sale under the Fleet-tech(TM) brand to distributors and end users in the on-highway, off-road, marine and power generation sectors. Clean Diesel will continue to focus on product development, FBC-emissions verification with after-treatment devices, and global promotions.

The Platinum Plus FBC provides significant emission reductions from diesel engines and is formulated to improve the performance of after-treatment devices such as diesel-oxidation catalysts (DOC), partial filters or diesel-particulate traps. Offered in both the Platinum Plus DFX and higher strength Platinum Plus DFX-DPF formulations, Fleetguard will carry both products through its nationwide sales and distributor partners. According to James Valentine, President of Clean Diesel, "These products have been demonstrated to improve the performance of after-treatment devices by reducing soot loading to the devices, lowering soot-oxidation temperature and keeping devices catalytically active."

Clean Diesel and Fleetguard are cooperating on engine and field testing of a new on-board delivery system developed by Fleetguard and incorporating a reservoir of FBC into the engine's fuel filter. This system will release the FBC into the fuel as it is pumped through the fuel filter on its way to the engine. This FBC dosing system requires no action by the vehicle operator other than having the filter replaced during scheduled maintenance.

Commenting on the agreement, David Brisk of Fleetguard said, "Our target markets will initially be those fleets using after-treatment devices where the benefits of a fuel-borne catalyst are well established. These include fleets using particulate filters or diesel-oxidation catalysts which can become fouled with soot under low temperatures or stop-and-go driving cycles. The Platinum Plus FBC reduces engine-out soot loadings and allows soot to oxidize at lower temperatures, thus reducing or eliminating plugging of exhaust treatment devices."

Initially targeted at the retrofit market, Clean Diesel is also conducting programs using Platinum Plus FBC in advanced engines with exhaust gas recirculation (EGR) and soot filters to achieve the 2007 emissions standards. Use of the FBC is expected to allow lower platinum loadings on after-treatment devices, reduce fuel economy penalties of new low emissions engines, and improve low temperature regeneration of soot filters in difficult medium-duty urban drive conditions.

About Fleetguard, Inc.

Fleetguard, Inc. is a wholly owned business unit of Cummins Inc. and the world's leading designer and manufacturer of heavy-duty air, fuel, hydraulic and lube filtration, chemicals and exhaust system technology products for diesel and gas powered equipment. Fleetguard cares about maintaining a cleaner, healthier, and safer environment. Going beyond compliance, Fleetguard proactively seeks improvements to products and processes and offers environmentally friendlier product choices for all major engine systems. Fleetguard's homepage on the Internet can be found at www.fleetguard.com. In North America, customers can call Fleetguard® Customer Assistance at 1-800-22FILTER (1-800-223-4583) for more information.

About Clean Diesel Technologies, Inc.

Clean Diesel Technologies, Inc. and its UK representative office, Clean Diesel International LLC, is a developer of chemical and technological solutions to reduce harmful engine emissions. Clean Diesel Technologies has patented products that reduce emissions from combustion engines while simultaneously improving fuel economy and power. Products include Platinum Plus® fuel-borne catalysts (FBC), the Platinum Plus Purifier System and the ARIS® 2000 urea-injection systems for selective catalytic reduction of NOx. Platinum Plus and ARIS are registered trademarks of Clean Diesel Technologies, Inc. For more information, visit CDT at www.cdti.com or contact the Company directly.