Patent ID: 6041591
Filing Date: 2000-03-28
Classification: F01N,F02D,Y02T

Abstract:
An exhaust gas heating system for an in-cylinder injection internal combustion engine, comprising:a fuel injection device for injecting fuel directly into a combustion chamber of the internal combustion engine;a spark plug for subjecting fuel, which has been injected as primary fuel from said fuel injection device, to spark ignition so that said primary fuel undergoes primary combustion;an exhaust gas purification device arranged in an exhaust passage of the internal combustion engine;a purification device temperature computing unit for detecting a temperature of said exhaust gas purification device by detecting or estimating said temperature of said exhaust gas purification device; andan additional fuel injection control unit for controlling said fuel injection device to inject additional fuel when said detected temperature of said exhaust gas purification device is equal to or lower than a predetermined value, such that the additional fuel is injected during a flame lasting duration that a flame of said primary combustion based on said injection of said primary fuel remains,wherein said additional fuel injection control unit includes an injection timing setting unit for setting an injection start time of said additional fuel on a basis of a parameter which affects said flame lasting duration.