International Journal of Applied Research
Vol. 3, Issue 12, Part E (2017)
Optimization reduction on emissions in SI engines using catalytic converters
In this paper, the exploitation of thermal capacitance to keep the catalyst temperature high during a short parking period was studied. The present system consists of a Phase Change Material (PCM) fabricated in a special chamber enclosed at the top and bottom layers of the catalytic converter. Under normal engine operating conditions, the thermal energy of the exhaust gases heats up the PCM. During parking, the PCM undergoes partial solidification and the catalyst temperature is thus maintained inside the desired temperature range.
The main disadvantage of this method is that it is effective only within a specific length period after engine shut off, the time depending on the thermal specifications of the system.
This disadvantage is overcome by providing an electrical heating system. The electrical heating enables the heating up of the catalyst upto its operating temperature prior to engine start. This method is used when PCM mixture looses the heat retaining ability in due course of time. Thus the cold start emissions are largely controlled with these techniques.
How to cite this article:
Nanneboina Ramana, Dr. A Rama Rao, L Prakasarao. Optimization reduction on emissions in SI engines using catalytic converters. Int J Appl Res 2017;3(12):287-289.