초록 ▼

An exhaust gas cleaning device comprises at least one exhaust gas flowing passage, at least one particulates collecting member composed of two filter elements having different heat capacity, which is disposed within the exhaust gas flowing passage and heating means which is interposed between the fi

An exhaust gas cleaning device comprises at least one exhaust gas flowing passage, at least one particulates collecting member composed of two filter elements having different heat capacity, which is disposed within the exhaust gas flowing passage and heating means which is interposed between the filter elements so as to be closely contacted therewith. The filter element having smaller heat capacity is disposed on the upper stream side of the heating means and the filter element having larger heat capacity is disposed on the downstream side thereof. The filter element having smaller heat capacity is rapidly heated by the heating means and the heat of the filter element having smaller heat capacity is transmitted to the filter element having larger heat capacity. All of the particulates collected by the particulates collecting member can be burnt off with excellent heat efficiency.

대표청구항 ▼

An exhaust gas cleaning device for collecting and burning particulates contained within exhaust gases discharged from an internal combustion engine, comprising: a housing provided with an exhaust gas inlet port, an exhaust gas outlet port and at least one exhaust gas flowing passage which is formed

An exhaust gas cleaning device for collecting and burning particulates contained within exhaust gases discharged from an internal combustion engine, comprising: a housing provided with an exhaust gas inlet port, an exhaust gas outlet port and at least one exhaust gas flowing passage which is formed between said ports so as to be communicated therewith; at least one particulates collecting member for collecting particulates, said member being disposed in said exhaust gas flowing passage and being composed of two filter elements made of heat resistant material and having a large number of small open passages; said two filter elements having different heat capacities, said filter elements being disposed in series within said exhaust gas flowing passage with said filter element having smaller heat capacity being positioned upstream of said filter element having larger heat capacity; and heating means for heating said filter elements and said particulates collected thereby, which is interposed between said filter elements so as to be closely contacted therewith; said filter elements being formed of ceramic foamed bodies of different volumes;