EPA-AA-TAEB  74-29
  Evaluation of an Automobile Power
      and Deceleration Governor
             April 1974
     Test and Evaluation Branch
Emission Control Technology Division
   Environmental Protection Agency

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Conclusions

1.  Significant penalties in hydrocarbon emissions and in
    fuel economy resulted from the device installation.
    Carbon monoxide and oxides of nitrogen were significantly
    reduced.

2.  Vehicle driveability with the device was not evaluated,
    but would require analysis in any further development
    effort.

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Background

Mr. Coye Conner, representing Mr. Edward Smith, inventor
of the Power and Deceleration Governor, contacted the
Mobile Source Air Pollution Control laboratory in Ann Arbor,
Michigan,  to request a laboratory and engineering evaluation
of Mr. Smith's invention. Submitted with the request was a
test report prepared by Automotive Research Associates, Inc.
of San Antonio, Texas, indicating significant reductions of
exhaust emissions. A confirmatory test program was conducted
by the Test and Evaluation Branch of the Emission Control
Technology Division.

Device Description

The Power and Deceleration Governor is a vacuum controlled
throttle valve assembly installed between the carburetor
and the engine intake manifold. The control mechanism of the
device affects a carburetion cut-off during deceleration and
limits throttling during acceleration. There are no parameter
changes made to the engine's basic spark timing, idle CO setting,
or idle rpm. The cost of the device is approximately $50 and
can be installed in about one hour.

Test Program

A 1966 Chevrolet Impala, 283 CID, supplied by the inventor
was used in the testing.  Three tests were conducted, two
with the device installed, and one with a standard carburetor.
Two additional tests were run with the standard carburetor,
but were invalid due to an exhaust system leak. All testing
was performed in accordance with the 1975 Federal Test Pro-
cedure as outlined in the November 15, 1972, Federal Register.
The tests were conducted using the standard dynamometer
inertia loading of 4000 pounds and Indolene 30 as the test
fuel.

Test Results

The test results are presented in the Appendix of this report.
These results are summarized as  follows:

                Summary of Emission Results
                  % Change from Baseline
                                         PPG Device

            HC                           18% increase
            CO                           23% decrease
            CO2                          13% ih'cre'ase'"''
            NOx                          45% decrease
            Fuel Economy                  5% penalty

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                                  APPENDIX


                   Comparison of 1975 FTP Emission Results
            with and without the Power and Deceleration Governor
Without Device
Date
4-5
With Device
4-2
4-3
% Emission
HC gm/mi CO gm/mi CO 2 gm/mi NOx gm/mi
7.02 79.2 454.45 3.32

8.32 57.9 509.95 1.71
8.22 61.2 513.40 1.82
Change
Fuel Economy
14.8

14.4
14.1

              -17.8%     22.7%     -12.9%        45.2%        -4.7%
NOTE: a negative sign indicates an increase of emissions
      or fuel economy penalty.

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