AUTO – MOBILE EMISSION CONTROL
- 1. 1 Written By: AMIR HASSAN AUTO – MOBILE EMISSION CONTROL. There are three different types of auto 1) Exhaust – Emission : due to combustion of fuel Produce’s CO, CO2, NOX 2) Evaporative – Emission: emissions occur through several ways. Refueling: gasoline vapors are always present in fuel tanks. These vapors are forced out when the tank is filled with liquid fuel. Running Losses: The hot engine & exhaust system can vaporize gasoline when the car is running. Hot Soak: The engine remains are continues. 2) Crankcase– Emission: Leakage of combustion gases to engine occur due to gap between cylinder and piston ring produced gases which contain liquid oil called blowby gases. AUTO – MOBILE EMISSION CONTROL DEVICES. The Following devices are used to control Catalytic Converters. Exhaust Gases Recirculation (EGR) System. Positive Crankcase Ventilation (PCV) System. Fuel Evaporative Emission Control (EVAP) System. AMIR HASSAN | Of Chemistry Department GPGC – MARDAN. MOBILE EMISSION CONTROL. There are three different types of auto – mobile emission occur which are : due to combustion of fuel X, and Hydrocarbons. : HC’s escape into air through fuel evaporation. Evaporation emissions occur through several ways. : gasoline vapors are always present in fuel tanks. These vapors are forced out when the tank is filled with liquid fuel. : The hot engine & exhaust system can vaporize gasoline when the car is engine remains hot for a period when car is parked & gasoline emission Leakage of combustion gases to engine occur due to gap between cylinder and piston ring produced gases which contain liquid oil called blowby gases. MOBILE EMISSION CONTROL DEVICES. The Following devices are used to control the auto – mobile emission Catalytic Converters. Exhaust Gases Recirculation (EGR) System. Positive Crankcase Ventilation (PCV) System. Fuel Evaporative Emission Control (EVAP) System. HC’s escape into air through fuel evaporation. Evaporation : gasoline vapors are always present in fuel tanks. These vapors are forced out : The hot engine & exhaust system can vaporize gasoline when the car is hot for a period when car is parked & gasoline emission Leakage of combustion gases to engine occur due to gap between cylinder and piston ring produced gases which contain liquid oil called blowby gases. MOBILE EMISSION CONTROL DEVICES.
- 2. 2 Written By: AMIR HASSAN 1) Catalytic Converter : It’s a device used to reduce the combustion engine. A catalytic converter is placed inside the tail pipe through which deadly exhaust gases containing unburnt fuel, CO, NOX, are emitted. The function of catalytic converter is to convert these (such as CO2, N2, O2) and water. Types Of Catalytic Converters: AMIR HASSAN | Of Chemistry Department GPGC – MARDAN. Catalytic Converter : It’s a device used to reduce the toxicity of gases emission occur from internal converter is placed inside the tail pipe through which deadly exhaust gases containing unburnt fuel, CO, NOX, are emitted. The function of catalytic converter is to convert these gases into harmless gases and water. Types Of Catalytic Converters: toxicity of gases emission occur from internal converter is placed inside the tail pipe through which deadly exhaust gases into harmless gases
- 3. 3 Written By: AMIR HASSAN 2) Exhaust Gases Recirculation (EGR) System. The Exhaust Gas Recirculation (EGR) system's purpose is to contribute to air pollution. This keeps combustion temperatures below 1500 degrees the reaction between nitrogen and oxygen that forms NOx. Exhaust gas recirculation reduces the formation of NO exhaust gas to "leak" into the intake manifold. 3) Positive Crankcase Ventilation (PCV) System. AMIR HASSAN | Of Chemistry Department GPGC – MARDAN. Exhaust Gases Recirculation (EGR) System. The Exhaust Gas Recirculation (EGR) system's purpose is to reduce NOx emissions that contribute to air pollution. This keeps combustion temperatures below 1500 degrees 0 C (2800 degrees F) to reduce the reaction between nitrogen and oxygen that forms NOx. Exhaust gas recirculation reduces the formation of NOX by allowing a small amount of exhaust gas to "leak" into the intake manifold. Positive Crankcase Ventilation (PCV) System. reduce NOx emissions that C (2800 degrees F) to reduce lowing a small amount of
- 4. 4 Written By: AMIR HASSAN | Of Chemistry Department GPGC – MARDAN. 1) Fuel Evaporative Emission Control (EVAP) System. AMIRHASSAN741@GMAIL.COM