RNS Number:4808P
Clean Diesel Technologies, Inc
08 September 2003


NEWS RELEASE for September 8, 2003 at 2:30 am EDT and 7:30 am GMT (London time)


Contact    Allen & Caron Inc             or    Clean Diesel Technologies, Inc.
           Jay F. McKeage (investors)          James M. Valentine, President
           (212) 691-8087                      David W. Whitwell, CFO
           jay@allencaron.com                  (203) 327-7050
           --------------------
           Len Hall (media)
           (949) 474-4300
           len@allencaron.com
           --------------------


       CLEAN DIESEL TECHNOLOGIES SIGNS COMMITMENT LETTERS TO RAISE $3.8 M

        Funds Will Support EPA and CARB Verification of Joint Technology
                          for Diesel Emissions Control


STAMFORD, CT (September 8, 2003) ... Clean Diesel Technologies, Inc. (CDT) (EBB:
CDTI & AIM:CDT/CDTS) announced today that it has signed a commitment letter with
a strategic partner and several current UK based CDT shareholders for the issue
of $3.8 Million of CDT's common stock at a price of $1.63 per share. CDT expects
to complete the private placement on September 26, 2003.


The new CDT common shares will be issued in reliance on the exemption from
registration under Regulation S under the US Securities Act for offshore private
placements. Because the new shares are subject to transfer restrictions for a
period of time, they may not be resold to persons in the US or US persons, but
may otherwise be traded in the UK without other restrictions. Application for
the shares to trade on the Alternative Investment Market (AIM) of the London
stock exchange will be made and the shares are expected to trade on AIM under
the ticker symbol CDTI.


The proceeds of the fund raising will be used to complete verification with EPA
and the California Air Resources Board (CARB) of a catalyzed wire mesh filter
(CWMF) and the Company's patented Platinum Plus(R) fuel borne catalyst (FBC), as
well as general operating purposes. Previous tests at Southwest Research
Institute (SwRI) of the FBC/CWMF system generated over 65 percent particulate
reduction and in excess of 75 percent reduction of hydrocarbons (HC) and carbon
monoxide (CO) while minimizing the formation of unwanted nitrogen dioxides 
(NO2). The Company is in the process of obtaining the required 1,000 hours of
in-field use for final verification testing expected to take place in fourth
quarter 2003.


James Valentine, CDT President & COO, commented, "These funds will allow us to
complete the required field trials and third party testing required by EPA and
CARB for verification, as well as to expand our sales and technical support
functions with key corporate customers. Once verified, the combination of FBC/
CWMF will provide a strong Level 2 control technology under CARB's diesel
retrofit protocol."


CDT recently completed testing to support verification with both the EPA and
CARB of its Platinum Plus Purifier System, consisting of CDT's Platinum Plus FBC
and a lightly-catalyzed diesel oxidation catalyst (DOC). Tests at SwRI of the
FBC/DOC system resulted in over 45 percent reduction in particulate emissions
which meets a solid Level 1 control with CARB's retrofit program. The FBC/DOC
system is now listed on the EPA's verified technologies website, with final
reduction percentages expected to be posted in the next 30 to 60 days after the
EPA reviews all of the data.


Both the FBC/DOC and FBC/CWMF systems will be targeted at school bus fleets,
delivery vehicles and refuse trucks. They will provide lower cost solutions to
end users without the problems of excessive NO2 generation from traditional
heavily catalyzed systems.


About Clean Diesel Technologies, Inc.

Clean Diesel Technologies, Inc. is a specialty chemical company with patented
products that reduce emissions from diesel engines while simultaneously
improving fuel economy and power. Products include Platinum Plus(R) fuel catalysts
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 contact Clean Diesel Technologies directly, or visit their
web site at www.cdti.com.


Certain statements in this news release constitute "forward-looking statements"
within the meaning of the Private Securities Litigation Reform Act of 1995. Such
forward-looking statements involve known or unknown risks, including those
detailed in the Company's filings with the Securities and Exchange Commission,
uncertainties and other factors which may cause the actual results, performance
or achievements of the Company, or industry results, to be materially different
from any future results, performance or achievements expressed or implied by
such forward-looking statements. Readers are cautioned not to place undue
reliance on these forward-looking statements, which speak only as of the date
hereof.

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