Environmental Engineering Reference
In-Depth Information
Table 1
Maximum acceptable emission igures for ESC, ELR and ETC tests
on Euro IV industrial vehicles
European heavy-duty emission limit values
ESC and ELR ETC
CO g/kW h 1.50 4.00
HC g/kW h 0.46 -
NMHC g/kW h - 0.55
CH
4
a
g/kW h - 1.10
NO
x
g/kW h 3.50 3.50
PM g/kW h 0.02 0.03
Smokes m
−1
0.50 -
ESC, European Steady Cycle; ELR, European Load Response Test; ETC,
European Transient Cycle.
a
Only for CNG engines.
EURO IV
Table 2
Instrumented Trucks Speciications
Diesel truck
CNG truck
Diesel engine (ID)
Otto engine
Engine type
Turbocharged with intercooler
Turbocharged with intercooler
Displacement
7,790 cm
3
7,790 cm
3
Cylinders
Six, in line
Six, in line
Bore/stroke
115/125 mm
115/125 mm
Compression ratio
16:1
11.5:1
Engine power rating
228 kW (310 CV) at
1,950-2,400 rpm
200 kW (272 CV) at
1,100-1,800 rpm
Engine torque rating
1,300 N m (133 kg m) at 1,200-
1,675 rpm
1,100 N m (112 kg m) at
1,100-1,800 rpm
Curb weight
26,000 kg
26,000 kg
Measurement Equipment
The “on-board” measurement equipment is a Horiba OBS 2200 device (Fig.
1
).
It can acquire data under real-driving conditions of vehicle use. Such data are instan-
taneous, and accumulated CO, CO
2
, THC and NO
x
emissions, fuel consumption,
and the speed at any one instant are recorded. The set of gas analyzers provides real
mass emission results (g/s) and instantaneous emissions (expressed as percent or ppm,
depending on the gases involved). The analyzers are:
•
Multiple CO, CO
2
and H
2
O analyzer based on the Heated Non-Dispersive Infrared
Detection (HNDIR).
THC analyzer based on the Heated Flame Ionization Detection (HFID).
•
•
x
analyzer based on the Heated Chemiluminescent Detection (HCLD).
The equipment also incorporates an exhaust gas flow meter that includes a calibrated
pipe with its Pitot tubes, the sample gas outlet and the temperature sensor.
NO
