Investigation of Emission Reduction Effect by Controlling Cooling System in a Diesel Engine

Since environmental problems are getting serious, the worldwide are focused on exhaust emission from the vehicle. Many researchers have been performed to solve these problems in many ways. In this paper, we tried to reduce the emission by improving the traditional mechanical engine cooling systems which control the engine temperature with only engine speed and thermostat. The paper explained the improvement of emission by cooling system which is controlled by an electronic system based on the engine status.