Controlling Toxic Emission Exhaust in vehicle Using Chemically Modified Catalytic Converter

Abstract

Exhaust gas pollutants emitted to the atmosphere are seriously hygienic and environmental risk. This project responds to environmental and humanity needs to reduce the concentration of toxic emissions by injection an optimum amount of urea into the exhaust manifold to react with NOx and CO emissions inside catalytic converter. In order to achieve these goals, a new system was designed and implemented. The designed system is composed of mechanical and electronic parts such as sensors. Sensors are located before and after catalytic converter for measuring removal efficiency of catalytic converter. The effect of operational parameters was investigated for reducing the emission concentration. Experiments with new system were performed on a diesel engine. The effect of operational parameters such as (engine speed, diesel injection timing, A/F ratio and urea injection quantity) on the efficiency of the catalytic converter before and after urea injection. We observed that the concentrations of NOx and CO emissions reduced with injection urea in the exhaust, and the removal efficiency of catalytic converter is enhanced.