EXHAUST DEVICE OF INTERNAL-COMBUSTION ENGINE

摘要

An exhaust device of an internal-combustion engine provided with a catalytic converter (8) arranged in an exhaust passage (3) of the internal-combustion engine (1); a fuel supply valve (7) that is arranged on the upstream side of the catalytic converter (8) and supplies fuel into the exhaust passage (3); an ignition device (21) capable of igniting the fuel supplied from the fuel supply valve (7); a pressure regulating device (16) that regulates the pressure of the fuel supplied to the fuel supply valve (7); and a controller (10) that controls the fuel supply valve (7) and the pressure regulating device (16). The controller (10) controls the fuel supply valve (7) and the pressure regulating device (16) so as to execute at least one of a plurality of injection operations having different fuel pressures from each other and performed successively, and a single injection operation performed while changing the fuel pressure.