초록 ▼

An exhaust gas cleaning device for diesel engines including a filter provided in an exhaust gas passage of the diesel engine for trapping particulate materials in exhaust gas passing through the exhaust gas passage, and a burner upstream of the filter for burning the particulate materials deposited

An exhaust gas cleaning device for diesel engines including a filter provided in an exhaust gas passage of the diesel engine for trapping particulate materials in exhaust gas passing through the exhaust gas passage, and a burner upstream of the filter for burning the particulate materials deposited on the filter. The filter has a gas inlet surface which is perpendicular to an axial direction along which the exhaust gas is passed and where the particulate materials are apt to be deposited. The burner include a fuel nozzle and a combustion chamber for effecting combustion of fuel from the fuel nozzle. A mixing chamber is provided between the combustion chamber and the filter for drawing the engine exhaust gas to mix it with combustion gas from the combustion chamber. The mixing chamber has an inlet communicating with the combustion chamber and an outlet opposite to the inlet. The gas inlet surface of the filter is exposed to the mixing chamber at the outlet.

대표청구항 ▼

An exhaust gas cleaning device for diesel engines which comprises filter means provided in exhaust gas passage means of the diesel engine for trapping particulate materials in exhaust gas passing through the exhaust passage means, burner means upstream of the filter means for burning the particulate

An exhaust gas cleaning device for diesel engines which comprises filter means provided in exhaust gas passage means of the diesel engine for trapping particulate materials in exhaust gas passing through the exhaust passage means, burner means upstream of the filter means for burning the particulate materials deposited on the filter means, said filter means having gas inlet surface means which is substantially perpendicular to an axial direction along which the exhaust gas is substantially passed and where the particulate materials are apt to be deposited, said burner means including fuel nozzle means and cylindrical combustion chamber means for effecting combustion of fuel from the fuel nozzle means, engine exhaust gas introduction means positioned between said fuel nozzle means and said filter means, mixing chamber means provided between said combustion chamber means and said filter means for drawing the engine exhaust gas to mix it with combustion gas from the combustion chamber means, said burner means, said mixing chamber means and said filter means being arranged in a line, said mixing chamber means having inlet means communicating with said combustion chamber means and outlet means opposite to said inlet means, said mixing chamber means being defined by wall means which flares outwardly from one end adjacent to said combustion chamber means to the other end which is adjacent to the filter means, said wall means having a diametrical dimension at said other end which is substantially equal to that of the gas inlet surface means of said filter means and so that said gas inlet surface means of the filter means is completely exposed to said mixing chamber means at the outlet means thereof, said mixing chamber wall means being formed with a plurality of perforations, exhaust gas chamber means provided around said mixing chamber means and around said combustion chamber means so that all the exhaust gas from said exhaust gas chamber means enters the mixing chamber means through said perforations in the wall means and downstream of said combustion chamber means, said fuel nozzle means being provided in support tube means which is smaller in diameter than the combustion chamber means and provided at an end of the combustion chamber means opposite to the mixing chamber means, ignition means provided in the support tube means in the vicinity of the fuel nozzle means, air inlet means for drawing air into the support tube means around the fuel nozzle means so that the air is mixed with the fuel injected from the fuel nozzle means.