74-15 AW
 EVALUATION OF THE SPRITZER EMISSION
          CONTROL DEVICE
           October 1973
     Test and Evaluation Branch
Emission Control Technology Division
   Environmental Protection Agency

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Background

The Test and Evaluation Branch of the Emission Control
Technology Division was contacted by Mr. Spritzer who
requested an evaluation of an emission control device.
Data indicated major reductions in hydrocarbons and
carbon monoxide levels. Based on these preliminary
results a confirmatory test program was arranged at the
EPA laboratory.

Device and Vehicle Description

The device, which fits underneath the carburetor, is de-
signed to produce better mixing and distribution of the
intake charge and, at the same time, allows the use of a
leaner fuel mixture to increase fuel economy and reduce
exhaust emissions. Further description is not possible
due to patent considerations.

The device was tested on a 1972 3/4-ton: CMC pick-up truck
equipped with a 5.7 litre (350 CID) engine and a four-speed
manual gearbox. The carburetor is a four-barrel design. The
vehicle was tested at an inertia weight of 2268 kg (5000 Ibs).

Test Procedure

A total of four tests were conducted on the vehicle. Three
tests were run' with the device installed and one test was
run without the device (baseline). For the baseline test the
vehicle was adjusted to the manufacturer's specifications.

All tests were run in accordance with the 1975 Federal Test
Procedure  (FTP) Federal Register, Vol. 37, No. 321, Part II.

Results

Use of the device resulted in no significant decreases in
either HC or CO and in one test produced fairly substantial
increases in both of these. The device decreased NOx in two
of the tests and produced no change in the third test. Fuel
consumption increased in all three tests when the device was
installed.

Conclusions

In its present state of development, the device does not show
ability to significantly reduce either HC or CO. It possible
might have limited application for the case in which NOx
reduction was the main concern.

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                                     SPRITZER DEVICE
                                     MASS  EMISSIONS  IN
                                   GRAMS PER KILOMETER
                                    (grams Der mile)
Test #
HC
CO
CO
NOx
Fuel Consumption
1
2
3
4 Baseline
1975
Interim
Standards
2. 83
(4.55)
3.95
(6.36)
5.71
(9.18)
2.84
(4.57)
0.93
(1.5)
15.95
(25.6^)
12.09
(19.46)
36.89
(59. 36)
13.01
(20.94)
9.32
(15.0)
386.59
(622.02)
390.48
(628.29)
399.16
(642.25)
378.51
(609.03)

2.40
(3.86)
1.15
(1.85)
1.62
(2.60)
2.41
(3.88)
1.93
(3.1)
                                                        18.0  litres/100  km
                                                        (13.1 mpg)

                                                        18.2  litres/100  km
                                                        (12.9 mpg)

                                                        20.8  litres/100  km
                                                        (11.3 mpg)

                                                        17.0  litres/100  km
                                                        (13.8 nrog)

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