بررسی مقایسه ای آلاینده های مهم خروجی از اگزوز خودروهای بنزینی و دیزلی

Motor vehicle emissions are a major anthropogenic source of air &nbsp;&nbsp; pollution. In this study, a comparison of amounts of major emission pollutants &nbsp;&nbsp; that they regulated in UK was done for three types of automobile includes &nbsp;&nbsp; standard petrol, petrol with TWC and diesel. Also a comparison of amount &nbsp;&nbsp; of carbon dioxide emission that it is important in green house effect was &nbsp;&nbsp; shown in those three types of automobile. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; For this purpose 300 automobiles were chosen after primary investigation &nbsp;&nbsp; and pollutants emissions were tested in different condition of engine and &nbsp;&nbsp; environmental temperature. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The result of this study showed pollutant emission includes THC, NOx and &nbsp;&nbsp; CO from petrol car was higher than that from diesel engine when engine was &nbsp;&nbsp; hot (P<0.001 , P< 0.0228 and p<0.0336 respectively) but amount of those &nbsp;&nbsp; emission pollutant in car with TWC was close to amounts from diesel engine . &nbsp;&nbsp; The amount of particles from diesel engine was attentionable in comparison &nbsp;&nbsp; with&nbsp; one&rsquo;s from petrol and petrol with TWC car. Also the results showed that &nbsp;&nbsp; CO and THC emission from two types of TWC petrol and diesel car were &nbsp;&nbsp; higher when environmental temperature was low. Although amount of CO2 &nbsp;&nbsp; in middle speed was lower from diesel engine. In&nbsp; many cases most light &nbsp;&nbsp; hydrocarbons from petrol vehicles with TWC were higher than diesel engine &nbsp;&nbsp; that a clear difference was noticeable for amount of toluene emission &nbsp;&nbsp; (P<0.004). &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It is not possible to make a direct comparison of environmental &nbsp;&nbsp; friendlines of TWC petrol and diesel vehicle. From the present study&rsquo;s results, &nbsp;&nbsp; it is recommendable that petrol car manufactures have to install TWC &nbsp;&nbsp; system on all petrol vehicle and government should provide new standard &nbsp;&nbsp; and strong legislations for all new and old petrol and diesel vehicles. &rlm;