From fuel tank evaporation
From carburettor evaporation
From crank case blow by
From exhaust system
Co2 + Hc + H2O
NOx + Co2 + Pm
H20 + CO2 + Nitrogen
Pb + CO2 + Nox
CO + HC + NOx
Muffler and air cleaner
Controller and air cleaner
Feed pump and air cleaner
Engine breather and air cleaner
Control the noise
Control the emission
Control the temperature
Control the fuel consumption