Clean Diesel Technologies Annual General Meeting in London

STAMFORD, Conn.--June 9, 2005--Clean Diesel Technologies Inc. ("Clean Diesel" or CDT) (OTCBB:CDTI) (AIM:CDT) (AIM:CDTS), a developer of chemical and technological solutions to reduce harmful engine emissions, announced today at its Annual General Meeting (AGM) in London increased growth opportunities for its diesel retrofit technologies, progress on distribution agreements, major programs with engine manufacturers, new patents on its NOx reduction system and the successful completion of testing with the U.S. Environmental Protection Agency ("EPA").

Dr. Bernhard Steiner, CEO, reported that the company has made substantial progress in the last nine months. Particular emphasis has been placed on developing the customer base and bringing the company's excellent technologies to market.

The company has an agreement with Mitsui to purchase its catalyzed wire-mesh filter technology. This gives Clean Diesel a complete suite of technologies ranging from 25 percent reduction to up to 99 percent of diesel particulates.

With over 30 million existing diesels in Europe, U.S. and Asia under pressure to be cleaned up under retrofit programs, and 11 million of new diesels expected to be produced annually with lower emissions levels being phased in worldwide, the opportunities for the company's emission reduction technologies have never been better.

New arrangements for distribution and development for the Platinum Plus fuel-borne catalyst (FBC) were reported for the U.S. and Europe, including programs with Rhodia, Dinex and Fleetguard. Several specific OEM programs have been initiated to demonstrate CDT's lower cost and better performance emission-reduction systems for the new low-emission reduction engines scheduled to be introduced in 2007 and 2008.

As previously announced, the results of additional platinum testing for the EPA showed platinum emissions hundreds to thousands of times below standards for safe exposure.

With the company's markets being driven significantly by known and likely legislation, the future of the company looks very promising.

At the AGM, all resolutions were approved by shareholders, including the appointment of John J. McCloy II as a director.

About Clean Diesel Technologies Inc.

Clean Diesel Technologies Inc. and its U.K. 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(R) fuel borne catalysts, the Platinum Plus Purifier System and the ARIS(R) 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.