Patent ID: 8261532
Filing Date: 2012-09-11
Classification: F01N

Abstract:
1. A fuel supply control method for an exhaust gas control apparatus for an internal combustion engine, comprising: operating a fuel supply portion that supplies fuel to a portion upstream of an exhaust gas control portion that purifies exhaust gas released from the internal combustion engine such that a cycle formed by combining a fuel supply period in which fuel is supplied from the fuel supply portion and a fuel supply stopped period in which fuel is not supplied is repeatedly performed, and controlling an arrangement of the fuel supply period and the fuel supply stopped period such that a temperature of the exhaust gas control portion at each of a starting point and an ending point of each cycle is equal to a target temperature, wherein the fuel supply period: i) comprises a plurality of fuel pulses, ii) begins at a first point in time when the temperature of the exhaust gas control portion is below the target temperature, and iii) ends at a second point in time, following the first point in time, when the temperature of the exhaust gas control portion is above the target temperature, wherein