연료의 옥탄가 변화에 따른 스파크 점화기관의 노킹특성의 변화

Knock phenomenon is an abnormal combustion originated from autoignition of unburned gas in the end-gas region during the later stage of combustion process and it accompanys a high pitched metallic noise. Engine Knock is accompanied with a vibration of engine cylinder and when it is severe. it can cause major engine demage. Engine Knock is characterized in terms of knock crank angle. knock pressure…