Patent ID: 8091353

Claim:
An exhaust device for a diesel engine which supplies liquid fuel ( 6 ) from a liquid-fuel supply source ( 5 ) to a gas generator ( 3 ) which converts the liquid fuel ( 6 ) to flammable gas ( 7 ), a flammable-gas flow outlet ( 9 ) of the gas generator ( 3 ) being communicated with an exhaust route ( 1 ) upstream of a diesel-particulate-filter ( 2 ), the flammable gas ( 7 ) flowed out from the flammable-gas flow outlet ( 9 ) being burnt with oxygen in exhaust gas ( 10 ) to generate combustion heat, the exhaust gas ( 10 ) heated by the combustion heat being able to burn exhaust-gas fine particles remaining at the filter ( 2 ), wherein the gas generator ( 3 ) is provided with a catalyst chamber ( 51 ) which houses a catalyst ( 4 ) and within which catalyst-combustion heat is produced, the catalyst chamber ( 51 ) being arranged along an external periphery of a peripheral wall ( 1 a ) of the exhaust route ( 1 ), wherein a partition wall ( 14 ) provided within the peripheral wall ( 1 a ) of the exhaust route ( 1 ) divides an interior area of the exhaust route ( 1 ) into a flammable-gas mixing passage ( 15 ) and an exhaust-gas passage ( 16 ), a starting end portion ( 15 a ) of the flammable-gas mixing passage ( 15 ) being communicated with the flammable-gas flow outlet ( 9 ), an ignition means ( 45 ) comprising an igniting electric heater ( 45 a ) arranged at a predetermined portion in a region extending from an interior area of the flammable-gas mixing passage ( 15 ) to just after its terminal end portion ( 15 b ), the flammable gas ( 7 ) heated within the catalyst chamber ( 51 ) being mixed with part ( 10 a ) of the exhaust gas ( 10 ) in the flammable-gas mixing passage ( 15 ), and the ignition means ( 45 ) igniting the flammable gas ( 7 ).