List eight ways of reducing pollution. Explain PCV and evaporative emission system with suitable sketch.

List eight ways of reducing pollution. Explain PCV and evaporative emission system with suitable sketch.
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1 Answer

Answer :

Eight ways of reducing pollution:- 

1) Optimize Ignition Advance 2) Use unleaded gasoline & Low sulphur diesel 3) Use leaner air fuel ratio 4) Use exhaust gas treatment devices ex Catalytic converter, EGR valve PCV system etc. 5) Use smoke suppressant additives 6) Fumigation 7) Do periodic Maintenance 8) De-rating 9) Use Alternative fuel CNG,LPG, Bio-diesel, Hybrid Vehicle, Electric vehicle, Solar vehicle etc. 10) Use Computer control engines with advance technology such as CRDI, VVT, VTEC, DTSi etc.


PCV system: The purpose of PCV system is to remove these harmful gases from the crankcase before damage occurs and combine them with the engine’s normal incoming air: fuel mixture. 

PCV system uses a variable flow PCV valve accurately matches ventilation flow with blowby production characteristics. By accurately matching these two factors, crankcase ventilation performance is optimized, while engine performance and drivability remains unaffected

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Evaporative emissions control System: 

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As fuel is drawn from the tank, a vacuum may be created in the tank. This is prevented by allowing atmospheric pressure to enter the tank through the check valve in the charcoal canister or fuel tank cap check valve. The EVAP system is designed to limit maximum vacuum and pressure in the fuel tank.

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