Automotive Emission Control Strategies

The development of automotive emission control technology over the last three and a half decades is one of the greatest environmental success stories of this century. Compared to the 1960s the emission of motor vehicles has dropped to a fraction, the fuel economy has doubled.



New Innovations Which Changed the Gasoline Emission Scenario are multi-point fuel injection (MPFI), Variable valve timing (VVT), 3 way catalytic converter, Exhaust gas recirculation (EGR) & On-board diagnostic (OBD) whereas for reduction of  Diesel Engine Emission Turbocharger, Fuel injection system, Cooled EGR, After treatment devices such as Oxidation catalyst, Particulate traps, Lean NOx trap & SCR is used. There are some technical & non-technical measures by which emission can be controlled.

Non-Technical Control Measures:

·         Good town planning (low skyscrapers /satellite cities).
·         Congestion charges, area-licensing scheme, parking charges, phasing out of vehicles, etc.
·         Proper traffic pattern & road networking (eg. Flyovers).
·         Public awareness (energy efficient purchase, driving habits, carpooling).
·         Efficient public transport/transit system (Bus Rapid Transit).
·         Promote cycling/walking/Bicycle Lanes/2 Wheeler Bridges.
·         Proper maintenance.
·         Scrappage of Vehicles above 15 years.
·         Prevent Adulteration of fuels.
·         Living with plants.

Technical Control Measures:

·         Clean fuels & lubricants.
·         Alternate fuels.
·         After treatment.
·         Optimal design of engines.
·         Optimization of the driveline to improve fuel efficiency.
·         Retro fitment of new technologies.


Source & Image Courtesy: Auto how stuff works, OICA, NEERI

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