Contenuto principale

  1. Home
  2. Services and Projects
  3. Euro4, Euro5, and EEV

Euro4, Euro5, and EEV

After the presentation of the new 12 metre Mercedes Citaro buses, recently held in Piazza Unità, a further batch of EEV diesel Irisbus vehicles is being acquired.

A number of these buses are already running on a few lines: they are easily recognizable by the company’s pale-blue custom paint.

What does EEV mean?

EEV is an acronym for “Enhanced Environmentally-friendly Vehicle, defining vehicles producing emissions with levels below those established by current legislation.

The table below shows EEV vehicles’ improved levels of emissions compared to Euro4 and Euro5 vehicles. A particularly striking feature of this kind of vehicles is the very low level of emissions of both fumes and particles.

ESC/ELR Test Cycle
Euro 4 Euro 5 EEV
CO 1,50 g/kWh 1,50 g/kWh 1,50 g/kWh
HC 0,46 g/kWh 0,46 g/kWh 0,25 g/kWh
NOx 3,50 g/kWh 2,00 g/kWh 2,00 g/kWh
PM 0,02 g/kWh 0,02 g/kWh 0,02 g/kWh
Fumes 0,50 m-1 0,50 m-1 0,15 m-1

Car fleet renewal

The purchase of highly technological environmentally-friendly vehicles was part of a car fleet renewal plan which led to the acquisition of 348 new vehicles from 2001 to 2010.