Exposed Area Influence for Light Off of Catalyst to Reducing Hc/Co Emission from Automobile Si Engine Exhaust by Using Low Mass Electrically Heated Metal Catalyst

The automobile manufacturers to invest large amount of time and money to control the emission from the automobile. The use of catalytic converter is one of the popular methods to control the emission from the vehicle. The catalytic converters are active only after reaching the’ light off ‘ temperature which is fairly high and it takes two to three minutes for the catalyst attain the light off temperature from cold start. During this period, the exhaust gases enter into the atmosphere untreated. Low Mass Electrically Heated Metal Catalyst (LMEHMC) is very effective in reducing such emissions during this period due to the heated EHC reaches the required light off temperature quickly. In the present investigation, an attempt has been made to control the cold-start emission of a multi-cylinder SI engine using LMEHMC with EHC of 271cc volume at 1kw filled with copper oxide and silver oxide as catalyst applied in and out, and outside only of metal substrate. It is found that the LMEHMC with an EHC of 271cc volume at 1kw with copper oxide catalyst applied on both in and out of metal substrate with 80 lbm of air supplied which increase light off of catalyst to reduce cold-start Hydrocarbon and Carbon monoxide emission.