
                                                                   Exhibit 23a

                      Consent of Independent Auditors

We consent to the reference to our firm under the caption  "Experts" and to
the  use of  our  report  dated  February  26,  1998,  in the  Registration
Statement  (Form S-1 No.  333-___) and related  Prospectus  of Clean Diesel
Technologies, Inc. for the registration of Rights to purchase 50,000 shares
of Series B Convertible Preferred Stock and the registration of such Series
B Convertible  Preferred  Stock and the  registration  of 1,650,000  Common
Shares.

                                                  /s/ Ernst & Young LLP

Stamford, Connecticut

August 4, 1998
