A normal car has a very low SCR/DOC/PDF box pressure, which is 0.015MPa or 0.15kg/cm at idle speed ² 。 Not exceeding 0.03MPa or 0.3kg/cm at 2500 rpm ², If there is a slight blockage in the SCR/DOC/PDF of the car, the exhaust pressure will increase to 0.5MPa or 0.5kg/cm at 2500 rpm ² Even higher, the higher the pressure, the more severe the blockage.
