74-33 AW
Exhaust Emissions from a Diesel-powered
         Nissan Passenger Car
               May 1974
      Test and Evaluation Branch
 Emission Control Technology Division
    Environmental Protection Agency

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Background

The Emission Control Technology Division is currently
conducting a technical feasibility study and evaluation
of the light duty Diesel engine to determine its potential
for low exhaust emissions in light duty passenger vehicle
applications. As part of the experimental phase of this
study we have tested several passenger vehicles powered
by Diesel engines.  One of the vehicles tested was a Nissan
220D supplied by the Nissan Motor Company of Japan.

Vehicle Description

The test vehicle is a four-door sedan. It is powered by a
four-cylinder Diesel engine with a displacement of 132.1 CID.
The engine produces 70 Bhp. The gearbox is a manual-type
with four speeds.

The inertia weight at which the vehicle is tested is 3500
pounds.

Test Program

All tests were run in accordance with the 1975 Federal Test
Procedure (FTP) for light duty Diesel-powered vehicles.
When the vehicle was delivered it had accumulated less than
200 miles. Two emission tests were run on the vehicle at
low mileage. After initial testing was completed, the vehicle
was driven over the AMA Durability Driving Schedule  (Federal
Register, Vol. 35, No. 219, November 10, 1970) until 4000 miles
had been accumulated.

Two emissions tests were run on the vehicle at the 4000-mile
point.

Test Results

The vehicle achieved 1976 interim emission levels at both low
mileage and at 4000 miles. Significant reductions in emissions
occurred after 4000 miles were accumulated on the vehicle. HC
and CO are about 50% of the specified limits and NOx is about
75% of the 1976 interim level.

Fuel economy at 4000 miles increased 17% over that at low
mileage.

Conclusions

The vehicle easily met the interim 1976 standards. The car
has adequate power for city and country driving, but there
is little reserve power for passing situations. Fuel economy
is well above the average for its weight class.

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                       Nissan Diesel
                     Mass Emissions in
                        Grams/Mile
                              Hot
                            FID HC      CO       NOx       MPG
Low mileage                  0.39      1.59      1.65      24.5

                             0.36      1.78      1.78      23.4
4000 miles                   0.19      1.41      1.44      27.9

                             0.26      1.27      1.28      28.3
1976 Interim
   Standards        .         0.41      3.4       2.0

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