Euro regulations of the EU, designed to determine the emission levels allowed for different vehicles, including buses, entered into force gradually over recent years (from the standard "Euro 1" the first in 1992 up to "Euro 6" currently). Israel has adopted the European standard. Euro standard sets a maximum level of emissions of the following gases: carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and particulates (PM). Today, most of the Dan bus company are sample Euro 4 and up.
Have a short explanation of these advanced models:
Euro 6 buses are required to reduce nitrogen oxide emissions by about 80% over the Euro 5 standards, and 66% of the tiny soot particles (PM).
Dan is upgrading to Euro 6
Model Euro 5 buses are required to meet the Euro 5 emission targets like those buses Euro 4 stand for, but are required to reduce nitrogen oxide emissions at 43% over the Euro 4 standards, so by improving the SCR system and injection system.
Noise levels of wear and friction to the bus tires are lower in those buses.
Equipped with the SCR system(Selective Catalyst Reduction) which includes converter reducing nitrous oxide using urea. In addition, the system includes a filter for the urea, urea injection control system, urea tank and other related systems. Emits less pollutants then the euro 3..
The following table reflects the change in the two main components of air pollutants.
Nitrogen oxide emissions (NOx) and particulate emissions of carcinogenic tiny soot (PM):
Changing table two important components of air pollutants