Environmental Engineering Reference
In-Depth Information
Fig. 1
Emissions measurement equipment Horiba OBS 2200
Fig. 2
MAHA particle measurement equipment
By using the carbon balance method, fuel consumption can be very accurately
determined from the mass emissions of CO, CO
2
and THC. Also, given that the
exhaust gas and fuel flow rate is known (calculated by carbon balance), the lambda
factor can be accurately calculated.
The equipment also includes sensors for measuring humidity and ambient
temperature and a GPS system for measuring the speed and position at every
instant. It also has a laptop with specific software for system control, data collection
and display and for generating test result reports.
Also integrated is an EIU (External Input Unit) with free analog ports to con-
nect other equipment such as smoke opacity meters, thermocouples, etc. These
analog inputs have allowed a MAHA particle measurement device to be connected
(Fig.
2
). This device provides the amounts of particles in mg/m
3
measured by
laser technology.
The installation of the instrumentation equipment inside a vehicle is shown in the
following images. Figure
3
shows the installation of the on-board emission measure-
ment device - Horiba OBS 2200-, and the MAHA particle measurement equipment.
