STUDY ON EFFECT OF GASOLINE DETERGENTS ON FUEL SAVE AND EMISSION REDUCTION OF IN-USE VEHICLES

Abstract

Abstract: Vehicle exhaust emissions are one of the critical factors in atmospheric pollution, particularly affecting haze and photochemical smog. Gasoline detergents are effective in removing engine carbon deposits, but research on their influence on fuel efficiency and exhaust emissions remains insufficient. This study investigates the effects of three mainstream detergents on cold-start exhaust pollutants before and after carbon deposit removal with representative in-use vehicles. The results indicate that detergents can significantly reduce engine carbon deposits, thereby decreasing carbon emissions. At normal temperatures, the use of detergents led to average reductions of 5.98%, 8.74%, and 14.13% in total hydrocarbons (THC), carbon monoxide (CO), and nitrogen oxides (NO_x) emissions, respectively. Particulate matter (PM) mass and number (PN) emissions decreased by 32.41% and 29.89%, respectively, and fuel consumption was reduced by 3.29%. After carbon deposits were removed by detergent, the emissions of THC, CO, and NO_x decreased by 23.72%, 31.43%, and 34.04%, respectively, under ultra-high-speed conditions in the worldwide harmonized light vehicles test cycle (WLTC). Additionally, using detergents significantly reduced THC, CO emissions during vehicle cold starts and rapid acceleration.

Key words: gasoline detergent, coke deposit, gaseous pollutant emission, particulate matter emission, fuel consumption

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