This difference is achieved through a number of changes to the engine's design and operation, including:
* Improved fuel injection systems, which provide better control over the fuel mixture and help to reduce emissions of unburned hydrocarbons
* More efficient catalytic converters, which convert harmful pollutants into less harmful substances
* EGR (exhaust gas recirculation) systems, which reduce NOx emissions by recirculating a small amount of exhaust gas back into the engine
* VNT (variable nozzle turbochargers), which improve engine efficiency and reduce emissions
* DPF (diesel particulate filters), which remove harmful particulate matter from the exhaust
As a result of these changes, Euro 3 engines produce significantly lower levels of emissions than Euro 2 engines. This helps to improve air quality and reduce the environmental impact of vehicles.
In addition to the emission standards, there are also some differences in the design of Euro 2 and Euro 3 engines. For example, Euro 3 engines typically have a higher compression ratio than Euro 2 engines, which helps to improve fuel efficiency. Euro 3 engines also often use lightweight materials, such as aluminum, to help reduce weight.
Overall, Euro 3 engines are more efficient and produce lower levels of emissions than Euro 2 engines. This makes them better for the environment and more economical to operate.
