The Effect of Using Crankcase Emission Control System (CECS) Technology on Air-Fuel Equivalent Ratio and Carbon Monoxide Emissions in Four-Stroke Gasoline Engines

Abstract

The test was conducted on a four-stroke gasoline engine with a rotation of 1000 rpm to 9000 rpm with an interval of 1000 rpm, using the Crankcase Emission Control System (CECS) which utilizes hot gas from the crankcase (crank chamber) that exits through the engine's breathing channel will mix with atmospheric air that has been filtered through the filter so that it becomes warm air and mixes with fuel which then the mixture flows into the combustion chamber. Then the vehicle was tested in stages. The first test was under standard conditions (without using CECS), and the second test with the use of CECS in the breathing channel. As a result of the leakage of hot gas in the gap between the piston and piston ring to the cylinder wall, the temperature in the crank chamber will increase. The observed things are the fuel supply time of 5 ml, the air-fuel equivalent ratio, and the concentration of carbon monoxide gas emissions. It turns out that the use of CECS can reduce the concentration of carbon monoxide quite significantly at 8000 rpm and 9000 rpm, respectively by 0.961% and 0.225%.