Question

Name the various advanced technologies adopted in emission control.

Hint:

Tip: Catalytic converter + EGR + DPF = cleaner emissions!

Answer 1

The following advanced technologies are commonly adopted in emission control systems:

1. Selective Catalytic Reduction (SCR): Uses ammonia or urea to convert nitrogen oxides (NO_x) into nitrogen and water.

2. Diesel Particulate Filters (DPF): Trap and remove soot and particulate matter from diesel engine exhaust gases.

3. Gasoline Particulate Filters (GPF): Similar to DPF, but used in petrol engines to capture fine particles.

4. Exhaust Gas Recirculation (EGR): Recirculates a portion of exhaust gases back to the engine cylinders to reduce NO_x formation.

5. Three-Way Catalytic Converter (TWC): Simultaneously reduces hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NO_x) in petrol engines.

6. Onboard Diagnostics (OBD): Monitors vehicle emission control systems and detects faults to ensure compliance.

7. Lean NO_x Traps (LNT): Absorb nitrogen oxides during lean engine operation and reduce them during rich conditions.

8. Hybrid and Electric Vehicle Technologies: Reduce or eliminate tailpipe emissions through electric propulsion systems.