Emission Laboratory Correlation Study Between
EPA and Honda Motor Company, Inc.
by
Richard E. Lowery
April 1974
Environmental Protection Agency
Office of Air Programs
Office of Mobile Source Air Pollution Control
Emission Control Technology Division
Procedures Development Branch
Ann Arbor, Michigan
-------
ABSTRACT
This report presents the results of a laboratory correlation
study between EPA and the Honda Motor Company, Inc. It specifically
compares Honda's certification test site at its Suzuka laboratory
to EPA's certification test site #6.
In general, the test sites compared in this study showed a
high degree of equivalency. No significant differences were dis-
covered in dynamometer or CVS characteristics, and vehicle emission
test results correlated rather well. The only significant discre-
pancy was laboratory measurement of vehicle CO emissions, which
could have been the result of laboratory barometric pressure dif-
ferences. Vehicle variability made an accurate assessment of this
effect very difficult.
-------
Emission Laboratory Correlation Study Between
EPA and Honda Motor Company, Inc.
Introduction:
The goals of a laboratory correlation program are inherently
two-fold; to identify differences in equipment, techniques, and
procedures, and to relate the effect of these differences to emis-
sion levels of various motor vehicles. In this program, emphasis
was placed on evaluating the effects of laboratory differences on
vehicle emissions rather than isolating the differences. This re-
port will discuss probable differences between EPA's certification
test site #6 and a test site of the Honda Motor Company, Inc. and
explore the effect of these differences on the emission levels of
several Honda vehicles.
Purpose:
It is the intent of this report to present the findings of the
correlation study between EPA and Honda and to derive from those
findings conclusions regarding the usage of production vehicles as
correlation tools.
Test Vehicles and Equipment:
During this correlation study, four Honda vehicles were tested
at EPA. All were front wheel drive vehicles equipped with four-
cylinder engines, and all were tested in the 2000 pound inertia
class. Data of these vehicles are tabulated below:
V.I.D. 657LF-1009 657LF-1004 SBA-2112073 SG-1000249
Model Civic CVCC Civic CVCC Civic Civic CVCC
C.I.D. 90.8 90.8 75.5 90.8
Transmission 4-speed 4-speed 4-speed 2-speed
System Engine Engine Air Engine
Modification Modification Injection Modification
Standard Federal California Federal California
Statutory Interim Interim Interim
The model Civic CVCC vehicle employs Honda's stratified-charge
engine.
Other equipment used in this study included nine calibration gas
cylinders, a Honda critical-flow orifice for CVS calibration, timing
deivces to measure dynamometer characteristics, and appropriate trans-
ducers to measure vehicle speed, manifold vacuum, and temperatures.
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-2-
Sequence of Correlation Testing:
All vehicles tested at EPA in this program were previously
tested at Honda's Suzuka laboratory in Japan. The calibration gases
provided by Honda were not analyzed in Japan prior to EPA's analysis.
Test Procedures:
Emission Tests - All vehicles involved in this correlation study
underwent the same types of emission tests. These tests .may be cate-
gorized as three types: (a) 1975 certification tests, without evap-
orative measurements, (b) steady-state dilute exhaust samples,' and
(c) steady-state raw exhaust samples. In conducting the 1975 certi-
fication tests, the Federal Test Procedure was modified to eliminate
unnecessary procedures. Each vehicle was preconditioned before its
first test, but not before subsequent tests. No evaporative measure-
ments were taken on any vehicle, but before each test, the vehicle's
fuel was heated from 60°F to 84°F as specified in the evaporative
section of the Federal Test Procedure. Each vehicle underwent three
valid 1975 tests, the second of which was driven by a Honda technician.
The Honda driver was used in an attempt to identify the effect of
driver differences on vehicle emissions.
The steady-state dilute samples were obtained from each vehicle
at constant speeds of 50, 30, and 10 mph. The vehicle was warmed on
the dynamometer and then run at each steady state speed for five
minutes. A separate set of collection bags was deployed for each
steady-state speed, and these bags were analyzed by EPA following
normal certification procedures. All of these tests were driven by
the Honda driver.
The steady-state raw samples were obtained from each vehicle at
speeds of 60, 50, 40, 30, 20, 10, and idle. A sample probe was placed
directly in the vehicles exhaust and the emission levels were measured
by Honda technicians. These tests were also driven by the Honda driver,
Calibration Gas Check - The calibration gases provided by Honda
were analyzed at EPA on certification train 21.
Dynamometer Check - Honda technicians obtained characteristics
of EPA dynamometer #6 by running a series of coast-downs and accelera-
tions at the 2000 pound inertia weight. Coast-downs were run both
with the vehicle on and off the dynamometer rolls. Accelerations
were'run, using a 4-speed Honda Civic CVCC, from 30 to 50 mph in 4th
gear and 20 to 40 mph in 3rd gear. Both accelerations were at wide
open throttle.
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-3-
CVS Check - With the aid of EPA technicians, Honda engineers
conducted a check of EPA's CVS unit 9C. A Honda critical-flow
orifice was used to calibrate the flow rate of the CVS system.
Data Sources:
All data presented in this report were generated at EPA test
site #6 or at Honda's Suzuka laboratory. Data relating to the dyna-
mometer check were generated and analyzed by Honda engineers.
Analysis of Data:
Emission Tests - Two types of emission tests will be used to
compare EPA and Honda test sites - 1975 certification tests and
steady-state dilute sample tests. Data of these tests may be found
in Appendix I.
The four vehicles used in this laboratory correlation produced
greatly different data comparisons, but some general trends can be
seen. Using average certification test emissions of the vehicles at
the two laboratories, NOx and C02 values appear to be equivalent.
The maximum NOx discrepancies occurred on the last two vehicles
tested, with Honda's lab reporting a 13% lower value than EPA on
vehicle SG-1000249, but a 13% higher value on vehicle SBA-2112073.
C02 levels were higher at Honda's facility than at EPA on three ve-
hicles (maximum 6%), but vehicle 657LF-1004 showed a 10% lower C02
value at Honda.
More consistent certification test emission differences were seen
between laboratories in CO and HC measurements. Average levels of the
four vehicles tested showed Honda's CO values to be 10-31% lower than
EPA's, and Honda's HC values to be 27%, 24%, and 19% lower and 1%
higher on the respective vehicles. The vehicle with only 1%'HC dif-
ference between laboratories was the CVCC model designed to meet the
1975 federal statutory standards.
The steady-state emission tests tended to show very small differ-
ences in emission levels of the two laboratories. C02 levels at Honda's
laboratory were consistently lower than at EPA's, especially at the 10
mph speed (4-25% lower). Differences in other emittants were not con-
sistent as speeds and vehicles varied.
Calibration Gases - Because the calibration gas cylinders were
analyzed at EPA prior to analysis in Honda's laboratory, no data com-
parison is available at this time. Results of EPA's analysis are
tabulated in Appendix II.
Dynamometer Checks - The dynamometer coast-down data acquired
by Honda was used to derive a comparison with their dynamometer in
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-4-
Japan. (See Appendix III) EPA's dynamometer #6 was characterized as
absorbing greater horsepower over the entire speed range, with a maxi-
mum difference of approximately 0.9 horsepower at 40 mph.
Discussion:
Because of the design of this correlation study, an accurate assess-
ment of the effects of test site differences is not easy to make. No
data are available which would compare the effects of analysis system
differences, and the use of four vehicles increases the variability
which an analysis must consider.
Some differences between test sites can be isolated, but their
effects can only be approximated, at best. Dynamometer tests revealed
that EPA's dynamometer #6 exerted a slightly greater load than Honda's
test dynamometer, but that added loading did not seem to affect C02 or
NOx levels significantly. Data acquired by Honda technicians in their
CVS check are not available for this report, but their analysis indi-
cated no significant differences would be experienced because of varia-
tions in the CVS systems. Another possible difference, that of driver
characteristics, was not experienced in a comparison of tests driven
by EPA and Honda drivers. One difference which is very obvious is
the test site barometric pressure, but the effect of this difference
could vary between vehicles, making its isolation quite difficult.
Using the vehicle emission tests as comparators, Honda's labora-
tory produced significantly lower CO and slightly lower HC levels than
EPA's laboratory. Twice during testing, vehicle problems caused un-
usually high HC values. The first test on vehicle SBA-2112073 pro-
duced high HC because an engine vacuum line was leaking. The problem
was found by Honda technicians and corrected. Vehicle SG-1000249
made use of a throttle control valve which was sensitive to barometric
pressure, and that valve was adjusted prior to the final test on that
vehicle. Reasons for the trend toward lower HC and CO at Honda's
laboratory are not clear, but the effect of barometric pressure may
be the main cause of the discrepancy.
As has been the case in previous EPA correlation programs, vehicle
variability poses the major problem in judging test site equivalency.
If one looks at the most repeatable vehicles used in this study, CO
discrepancies seem to be the only problem. Vehicle #657LF-10.04 was
most repeatable on HC, CO and NOx, and Honda's discrepancies with EPA's
average values on that vehicle were only 1%, 10%, and 3.4% respectively.
The most repeatable C02 vehicle, #657LF-1009, showed only a 2% differ-
ence in average C02 levels. Other vehicles showed larger deviations,
but they also exhibited less operational consistency. Unfortunately,
one cannot rely on vehicles to isolate test site differences, but, in
this study, vehicles were used in an attempt to reach that end.
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-5-
Concluslons:
Results of this correlation study indicate a high degree of
equivalency between Honda's test site and EPA's site #6. The only
major discrepancy observed was Honda's tendency to produce lower CO
emission levels than EPA. The large difference in barometric pressure
between the two facilities may be a major contributor to that dis-
crepancy, but the variability between test vehicles and the small
number of tests on each vehicle make an accurate estimation of this
barometric effect impossible.
Summary and Recommendations:
Results of the laboratory correlation study between EPA and
Honda Motor Company, Inc. have been presented and discussed. In general,
there was a very good correlation between the test sites of the faci-
lities involved.
In future correlation studies, programs should be designed to use
vehicle emission tests as a final check of site equivalency. Prior to
any vehicle tests, both EPA and the manufacturer should identify dif-
ferences relating to CVS, dynamometers, and analyzers. In this program,
there was no confidence that the laboratories' equipment was equivalent
before vehicles were tested. Unless this confidence is established
before vehicles are tested, emissions tests will not be helpful in
isolating the effects of test site differences.
-------
APPENDICES
-------
APPENDIX I
Emission Test Data
Section Vehicle
IA 657LF-1009
IB 657LF-1004
1C SBA-2112073
ID SG-1000249
-------
Section IA
Vehicle 657LF-1009
Federal Statutory Standard
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HONDA CORRELATION DATA fLA 41
Vehicle Civic 657LF-1009
Standard Statutory
Test Lab
HC
CO
NO,
CO 2
Fuel
Consumption
(mpg)
Barometric
Pressure
(in. Hg)
K-Factor
Cold
Transient
(g)
EPA
3.04
21.83
5.82
1267.91
24.3
SuzuKa
2.73
16.39
6.46
1306
Cold
Stabilized
(g)
PPA
0.92
11.27
4.16
1508.49
22.7
Suzuka
0.48
9.62
4.51
1516
Hot
Transient
(g)
EPA
1.59
12.32
5.76
1164.75
26.8
Suzuka
1.56
8.64
6.48
1203
Total
(g/mile)
EPA
0.42
3.69
1.33
362.35
24.4
29.04
0.8167
Suzuka
0.34
2.88
1.46
368
30.19
-------
Honda Correlation Data (LA4)
Cold
Transient
(g)
Cold
Stabilized
(g)
Hot
Transient
(g)
Total .
(g/mile)
Vehicle Civic CVCC 657LF-1009 Test Lab. EPA
Test No.
1
2
3
1
2
3
1
2
3
1
2
3
HC
2.64
3.55
2.93
0.91
1.02
0.82
1 .48
1.77
1.51
0.385
0.475
0.392
CO
18.94
26.82
19.72
11.30
13.68
8.83
10.15
15.28
1 1 . 54
3.36
. 4.52
3.19
NOX
5.63
"5.62
6.20
4.08
3.. 98
4.42
5.79
5.54
5.94
1.31
1.27
1.40
C02
1266.37
1253.11
1284.26
1512.27
1 488 . 24
1524.85
1173.20
1162.55
1158.50
363.42
358.63
364.99
Fuel
Consumption
(mpg)
24.4
24.4
24.0
22.6 '
22.9
22.5
26 .Y
26.7
27,0
24.4
24.5
24.3
Barometric
Pressure
(in. Hg)
/
/
/
29.19
28.83
29 . 09
K-Factor
/
/
/
0.8114
0.8151
0.8237
-------
HnnHa Correlation Data (LA4)
Vehicle civic cvcc 657LF-1009
Test Lab. Suzuka
Test No.
HC
CO
NOv
C02
Fuel
Consumption
(mpg)
Barometric
Pressure
(in. Hg)
K-Factor
Cold
Transient
•• (g)
2.65
16.98
6.85
1324
2.52
15.65
6.46
1305
3.03
16.55
6.08
1289
Cold
Stabilized
(9)
0.44
9.08
4.60
1513
0.51
9.97
4.54
1501
0.50
9.80
4.40
1521
Hot
Transient
(g)
1.08
7.73
6.29
1187
1.80
8.65
6.49
1205
1.79
9.55
6.65
1218
Total
(g/mile)
0.29
2.77
1.48
368
0.35
0.37
2.88
2.98
1.47
1.44
367
369
30.36
30.12
30.09
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HONDA CORRELATION DATA ("CRUISING")
Vehicle
Civic 657-1009
Standard Statutory
50 mph
(g/mile)
30 mph
(g/mile)
10 mph
(g/mile)
Test
Lab
EPA
Suzuka
EPA
Suzuka
EPA
Suzuka
HC
0.01
0.007
0.01
0.004
0.10
0.06
CO
0.50
0.60
0.56
0.66.
2.65
2.76
NOv
1.34
1.44
0.60
0.56
0.57
0.48
CO?
256.99
265.6
257.06
269.2
538.50
520.8
Fuel
Consumption
fmpgl
34.4
34.4
16.3
Barometric
Pressure
fin.Hgl
29.12
29.12 .
29.12
K-Factor
0.8697
0.8697
0.8697
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Section IB
Vehicle 657LF-1004
California Interim Standard
-------
HONDA CORRELATION DATA TLA 41
Vehicle Civic 657LF-1004
Standard
Interim California
Cold
Transient
Cg)
Test Lab,
EPA
Suzuka
HC
4.93
5.18
CO
31.28
28.43
NO,
6.24
5.80
CO 2
1172.92
1068
Fuel
Consumption
(mpg)
25.7
barometric
Pressure
(in. Hg)
K-Factor
Cold
Stabilized
(8)
PPA
2.60
20.56
4.78
1346.11
25.0
Suzuka
2.66
19.38
.4.65
1200
Hot
Transient
(g)
EPA
2.10
16.69
6.22
1056.73
29.2
Suzuka
2.03
13.04
6.15
972
Total ..
(g/mile)
EPA
0.789
5.80
1.47
327.04
26.5
Suzuka
0.80
5.20
1.42
295
29.01
0.8057
30.15
-------
Honda Correlation Data
Cold
Transient
(g) .
Cold
Stabilized
(g)
Hot
Transient
(g)
Total
(g/mile)
Vehicle Civic CVCC 657LF-1004 Test Lab. EPA
Test No.
1
2
3
1
2
3
1
2.
3
1
2
3
HC
4.81
4.83
5.14
2.47
2.77
2.55
1.93
2.09
2.28
0.752
0.806
0.808
CO
31.42
33.16
29.27
21.49
20.55
19.65
15.87
18.08
16.12
5.87
. 6.02
5.52
MOX
5.96
6.43
6.34
4.88
4.54
4.91
6.04
6.10
6.52
1.45
1.44
1.51
C02
1179.62
1159.31
1179.83
1373.26
1308.88
1356.20
1076.56
1029.49
1064.13
332.55
319.22
329.34
Fuel
Consumption
(mpg)
25.6
26.0
25.6
24.5
25.7
24.9
28.8
29.9
29.0
26.1
27.0
26.4
Barometric
Pressure
(in. Hg)
/
/
/
28.94
29.19
28.89
K-Factor
/
/
/
0.8128
0.8013
0.8031
-------
Honda Correlation Data (LA4)
Vehicle Civic CVCC 657LF-1004
Test Lab.
Suzuka
Test Mo.
HC
CO
NO,
C02
Fuel
Consumption
(mpg)
Barometric
Pressure
(in. Hg)
K-Factor
Cold
Transient
(g)
5.37
29.42
5.68
1055
4.64
25.98
5.90
1077
5.54
29.88
5.82
1071
Cold
Stabilized
(g)
2.64
18.26
4.66
1201
2.72
18.68
4.48
1198
2.63
21.20
4.80
1202
Hot
Transient
(g)
1.97
13.01
5.88
981
2.05
12.89
6.07
964
2.06
13.23
6.51
970
Total
(g/mile)
0.81
5.11
1.39
295
0.78
0.82
4.96
5.54
1.39
1.47
295
295
30.31
30.06
30.08
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HONDA CORRELATION DATA ("CRUISING!
Vehicle
Civic 657LF-1004
Standard Interim California
50 mph
(g/mile)
30 mph
(g/mile)
10 mph
(g/mile)
Test
lah
EPA
Suzuka
EPA
Suzuka
EPA
Suzuka
HC
0.08
0.05
O.TO
0.08
0.36
0.58
CO
2.39
2.05
2.36
2.02
5.86
5.34
NOV
1.61
1.58
0.60
0.40
0.46
0.36
C02
215.86
196.6
220.41
191.6
486.28
364.8
Fuel
Consumption
Cmpg")
40.4
39.5
17.9
Barometric
Pressure
fin.Hgl
28.94
28.94
28.94
K-Factor
0.8128
0.8128
0.8128
-------
Section 1C
Vehicle SBA-2112073
Federal Interim Standard
-------
HONDA CORRELATION DATA CLA 41
Vehicle Civic SBA-2112073
Standard Federal Interim
Test Lab,
HC
CO
NO,
CO 2
Fuel
Consumption
(mpg)
Barometric
Pressure
(in. Hg)
K-Factor
Cold
Transient
(g)
EPA
5.77
54.42
6.48
1100.47
26.5
Suzuka
4.55
44.57
7.26
1216
Cold
Stabilized
(g)
FPA
7.56
47.22
3.73
1332.59
24.2
Suzuka
5.43
36.82
4.23
1382
Hot
Transient
(g)
EPA
5.92
35.59
7.15
1001.45
29.6
Suziika
4.91
25.02
8.11
1084
Total
(g/mile)
EPA
1.79
12.1
1.41
316.88
26.5
Suzuka
1.36
9.37
1.60
335
28.83
0.8852
30.04
-------
Honda Correlation Data Q-A41
Cold
Transient
(g)
Cold
Stabilized
(g)
Hot
Transient
(g)
Total
(g/mile)
Vehicle Civic SBA-21 12073 Test Lab. EPA
Test No.
1
2
3
1
2
3
1
2
3
1
2
3
HC
6.94
4.78
5.58
8.99
6.04
7.66
7.52
4.87
5.36
2.17
1.45
1.75 .
CO
54.53
59.00
49.72
47.90
47.46
46.30
38.21
38.23
30.32
12.4
12.6
11.3
NOX
6.52
6.31
6.62
3.88
3.55
3.76
6.97
6.95
7.53
1.42
1.36
1.45
C02
1108.73
1104.88
1087.80
1352.69
1316.11
1328.98
1018.54
996.95
988.87
321.33
314.60
314.72
Fuel
Consumption
(mpg)
26.2
26.3
26.9
23.8
24.6
24.3
28.9
29.7
30.2
26.1
26.6
26.9
Barometric
Pressure
(in. Hg)
/
/
/
28.82
28.48
29.20
K-Factor
/
/
/
0,9121
0.8926
0,8508
-------
Honda Correlation Data (LA4)
Vehicle Civic SBA-2112073
Test Lab. Suzuka
Test No.
HC
CO
NO,
C02
Fuel
Consumption
(mpg)
Barometric
Pressure
(in. Hg)
K-Factor
Cold
Transient
(9)
Cold
Stabilized
(g)
Hot
Transient
(g)
Total
(g/mile)
4.34
5.55
3.77
5.28
5.48
5.54
4.43
5.18
5.12
1.29
1.44
1.35
41.35
43,86
48.50.
32.00
38.62
39.85
23.39
24.47
27.19
8.42
9.52
10.16
7.85
7.46
6.46
4.56
4.10
4.02
8.49
8.09
7.75
1.71
1.59
1.50
1209
1184
1156
1400
1385
1361
1074
1081
1098
338
335
331
30.19
30.07
29.86
-------
HONDA CORRELATION DATA CCRUISING1
Vehicle
Civic SBA-2112073
Standard Federal Interim
50 mph
(g/mile)
30 mph
(g/mile)
10 mph
(g/mile)
Test
Lab
EPA
Suzuka
EPA
Suzuka
EPA
Suzuka
HC
0.47
0.24
0.21
0.16
0.54
0.48
CO
4.98
2.92
4.71
4.00
13.18
11.16
NO*
2.24
1.56
0.48
0.44
0.42
0.48
CO?
198.37
223
243.91
230
520.37
474
Fuel
Consumption
(mpgl
42.7
35.2
16.3
Barometric
Pressure
rin.H£l
28.80
28.80
28.80
K-Factor
0.9123
0.9123
0.9123
-------
Section ID
Vehicle SG-1000249
California Interim Standard
-------
HONDA CORRELATION DATA CLA 41
Vehicle
Civic SG-1000249
Standard
Interim California
Cold
Transient
(g)
Test Lab,
EPA
Suzuka
HC
4.23
3.23
CO
40.39
29.01
NO,
8.69
7.83
CO 2
1278.20
1378
Fuel
Consumption
Qnpg)
23.5
Barometric
Pressure
(in. Hg)
K-Factor
Cold
Stabilized
(g)
PPA
2.01
19.64
6.41
1392.40
24.3
Suzuka
1.36
14.06
5.54
1426
Hot
Transient
(g)
EPA
1.93
17.57
8.42
1123.87
27.5
Suzuka
1.50
10.30
7.22
1230
Total
(g/mile)
EPA
0.66
6.29
1.99
344.35
25.0
Suzuka
0.48
4.32
.1.74
363
28.84
0.8901
30.08
-------
Honda Correlation Data (LA4)
Cold
Transient
(g)
Cold
Stabilized
(g)
Hot
Transient
(g)
Total
(g/mile)
Vehicle Civic S6-1000249 Test Lab. EPA
Test No.
1
2
3
1
2
3
1
2
3
1
2
3
HC
4.93
4.12
3.65
2.08
2.06
1.89
1.89
1.98
1.92
0.70
0.661
0.61 .
CO
44.47
39.14
37.55.
21.31
19.50
18.11
18.00
19.92
14.79
6.8
6.36
5.7
NOX
8.55
8.19
9.33
6.58
5.87
6.78
8.71
7.80
8.75
2.03
1.85
2.10
COe
1244.54
1254.53
1335.54
1398.29
1361.74
1417.17
1137.99
1119.38
1114.25
344.28
338.56
350.21
Fuel
Consumption
(mpg)
23.9
24.0
22.7
24.1
24.8
23.9
27.2
27.5
27.9
25.0
25.3
24.6
Barometric
Pressure
(in. Hg)
/
/
/
28.83
28.50
29.19
K-Factor
'/
/
/
0.9295
0.8924
0.8485
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Honda Correlation Data (LA4)
Vehicle Civic SG-1QQ0249
Test Lab. Suzuka .
Test No.
HC
CO
NO,
C02
Fuel
Consumption
(mpg)
Barometric
Pressure
(in. Hg)
K-Factor
Cold
Transient
(g)
3.26
25.33
7.69
1378
3.53
31.19
7.53
1381
2.91
30.52.
8.26
1374
Cold
Stabilized
(9)
1.30
13.86
5.56
1428
1.38
14.14
5.44
1434
1.39
14.17
5.63
1416
Hot
Transient
(g)
1.37
9.76
7.02
1216
1.55
10.77
7.17
1253
1.59
10.37
7.46
1221
Total
(g/mile)
0.47
4.04
1.72
362
0.51
0.47
4.49
4.43
1.70
1.79
366
361
30.22
30.14
29.87
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HONDA CORRELATION DATA CCRUISING1
Vehicle civic SG-1000249
Standard Interim-California
50 mph
(g/mile)
30 mph
(g/mile)
10 mph
(g/mile)
Test
Lab
EPA
Suzuka
EPA
Suzuka
EPA
Suzuka
HC
0.01
0.01
0.02
0.04
0.57
0.54
CO
0.57
0.62
1.31
0.86
3.09
3.36
NO*
1.63
1.37
0.68
0.56
0.47
0.54
i
C02
242.16
259
210.94
204
328.11
2.64
Fuel
Consumption
fmpgl
36.5
41.6
26.5
Barometric
Pressure
rin.Hgl
28.80
28.80
28.80
K-Factor
0.9255
0.9255
0.9255
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APPENDIX II
Calibration Gas Data
-------
Honda Calibration Gases
Gas
C3H8
in air
(ppm)
CaHs in N2 (ppm)
CO
in N?
(ppm)
C02 in N2 (%)
NO in N2 (ppm)
NOX in N2 (ppm)
NO in N2 (ppm)
NOx in N2 (ppm)
EPA Analysis - Tra
Cylinder
No.
C-4552
C-4508
C-4599
C-4546
C-6"74 '
C-690
C-1260
C-192
C-1288
in 21
Scott
Laboratory
7.31
22.46
27.52
44.15
70.2
222
0.93
24.1
24.4
46.0
46.5
EPA
7.2
22.6
27.7
43.9
68.2
215.4
0.919
23.0
23.3
43.2
44.2
Honda
-------
APPENDIX III
Dynamometer Data
-------
-------
*4
HP
a
VEHICLE
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