| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve fuel consumption when regenerating a filter, and to reduce cost of equipment by improving the efficiency of energy. <P>SOLUTION: This exhaust emission control device is so configured that exhaust gas from an engine 1 is cleaned up by being introduced to the exhaust gas filter 3, and the exhaust gas is heated by the fuel injection control of the engine 1 to regenerate the exhaust gas filter 3. In the exhaust emission control device, a heat exchanger 6 for exchanging heat between high-temperature exhaust gas heated to a high temperature when the filter is regenerated and delivered from the exhaust gas filter 3 and low-temperature exhaust gas introduced to the filter 3, is provided to the outlet of the exhaust gas filter 3. The heat exchanger 6 is configured such that an auxiliary pipe 8 for passing the low-temperature exhaust gas is crossingly provided in a main pipe 7 for passing the high-temperature exhaust gas delivered from the exhaust gas filter so that an exhaust gas passage is formed between the auxiliary pipe and the main pipe 7. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
