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ROVERBeen There ...Recorded That
ROVER - 13 February 2002, MSTRS Meeting 2
A Description of the
Real-time On-road VehicleEmissions Reporter
Dennis Johnson, US EPA
ROVER - 13 February 2002, MSTRS Meeting 3
10 Years Ago
ROVER - 13 February 2002, MSTRS Meeting 4
Invented by Leo Breton in 1995.FTP Correlation Demonstrated.
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Demonstrated on Different Technologies.
• Accurate
• Mass EmissionsMeasurement
• Vehicle andEngine Data
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Lab Correlation
ROVER - 13 February 2002, MSTRS Meeting 7
Diagnostics ReadyPhase 1 Catalyst Effeciency Test
30 April 1999
0
500
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3500
0 100 200 300 400 500
Test Time
HC
(pp
m)
-60
-40
-20
0
20
40
60
Out Cat - HCIn Cat. HCVehicle Speed
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On-road Testing
• Real Time Display
• Emissions
• NTE & gm/mi
ROVER - 13 February 2002, MSTRS Meeting 9
Nonroad Testing
1998 Off-Road Testing
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Over Six Years
LDV & LDT
HD Gas & Diesel
CNG
Nonroad
Enforcement
Diagnostics
Recall
Modeling
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Real Time Display
• NTE - gm/bhp-hr
• Mass Emissions
• gm/mi
• gm/bhp-hr
• Exhaust Flow
• Drive Route - FTP
• Vehicle & Engine Data
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Portable, Modular & Versatile
Smoke
&
RPM
Options
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Who Wants In-use Testing?
EPA
NESCAUM
Moscow
States
Retrofitters
Universities
Many More
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So what does Real-time On-roadVehicle Emissions Reporter
really mean?
• Flexible
• Many Inputs
• Real Time
• Confidence
• Data
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Where are we now?(10 Years Later)
Have Tested…
From Small to Big.
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With ROVER You Can Say…
Been There … Recorded That.
1999 Highway Driving in Western Maryland
0
500
1000
1500
2000
2500
3000
test time
Alti
tude
(ft
)
-2
0
2
4
6
8
10
NO
x (g
m/m
i)
AltitudeNOx (gm/mi)
