UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8 - K CURRENT REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) January 31, 2005 CLEAN DIESEL TECHNOLOGIES, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 0-27432 06-1393453 (State of other (Commission (IRS Employer Jurisdiction of File Number) Identification No.) Incorporation SUITE 702, 300 ATLANTIC STREET STAMFORD, CT 06901 (Address of Principal Executive Offices) Registrants telephone number, including area code (203) 327-7050 Items 8.01. Other Events On January 31, 2005 the Registrant issued the Press Release attached as Exhibit 99 to this Report on Form 8 - K to announce that it has initiated independent tests to address recent questions from the EPA (US Environmental Protection Agency) on the use of its fuel borne catalyst. Due to growing commercial interest in its diesel emission control products, testing is being conducted to confirm that the minute amounts of platinum emitted from vehicles using the fuel borne catalyst do not form potentially allergenic compounds in the engine or exhaust. The tests are expected to provide results in the next few weeks for review with EPA. Page 3. Clean Diesel Technologies, Inc. (Registrant) Date: February 1, 2005 By: /s/ D. W. Whitwell David W. Whitwell Vice President and Chief Financial Officer