Patent ID: 9169758
Filing Date: 2015-10-27
Classification: F01N,F02D,Y02T

Abstract:
1. A fuel injection control system of an internal combustion engine configured to operate with a liquid fuel and a gas fuel, said system comprising: a temperature sensor that obtains a temperature of an exhaust gas purification catalyst which is arranged in an exhaust passage of the internal combustion engine; and a controller comprising at least one processor configured to: at the time when HC poisoning of said exhaust gas purification catalyst has occurred, cause the internal combustion engine to operate with the gas fuel if the temperature of said exhaust gas purification catalyst is less than a specified value, wherein the specified value is a temperature of the exhaust gas purification catalyst at which the amount of elimination of HC poisoning per unit time is more with respect to the amount of HC poisoning per unit time, and cause the internal combustion engine to operate with the liquid fuel if the temperature of said exhaust gas purification catalyst is not less than the specified value.