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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 NkyDTuK31a9t1RcSgi6W6w==

<SEC-DOCUMENT>9999999995-10-002762.txt : 20100924
<SEC-HEADER>9999999995-10-002762.hdr.sgml : 20100924
<ACCEPTANCE-DATETIME>20100924001517
ACCESSION NUMBER:		9999999995-10-002762
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20100923
DATE AS OF CHANGE:		20100924
EFFECTIVENESS DATE:		20100923

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CLEAN DIESEL TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0000949428
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		IRS NUMBER:				061393453
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-166865
		FILM NUMBER:		101087653

	BUSINESS ADDRESS:	
		STREET 1:		10 MIDDLE STREET
		STREET 2:		SUITE 1100
		CITY:			BRIDGEPORT
		STATE:			CT
		ZIP:			06604
		BUSINESS PHONE:		2034165290

	MAIL ADDRESS:	
		STREET 1:		10 MIDDLE STREET
		STREET 2:		SUITE 1100
		CITY:			BRIDGEPORT
		STATE:			CT
		ZIP:			06604
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2010-09-23</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>17:00:00</finalEffectivenessDispTime>
        <form>S-4</form>
        <filer>
            <cik>0000949428</cik>
            <entityName>CLEAN DIESEL TECHNOLOGIES INC</entityName>
            <fileNumber>333-166865</fileNumber>
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