Technical Paper
On-board Exhaust Emission Measurement on Heavy Duty Vehicles at Different Driving Conditions.
2011-09-13
2011-01-2209
The present wording on implementing regulation on type-approval of motor vehicles and engines with respect to emissions from heavy-duty vehicles in Europe (e.g., Euro VI requirements) describes the procedure to determine gaseous emissions from on-road measurements using Portable Emissions Measurement Systems (PEMS). The gaseous emissions to be measured according to the PEMS protocol includes carbon monoxide (CO), total hydrocarbons (THC) and nitrogen oxides (NOx) for diesel engines and with the addition of methane (CH₄) for gas engines. Measurement methods of particles are at this stage under development. Emission data from on-road testing can be used for calculation of In-service Conformity (IsC) pass/fail criteria but also for establishing local emission factors for specific routes. The procedure for the measurement is described in detail in the regulation.
