| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device for improving fuel economy and increasing output, by improving exhaust efficiency. <P>SOLUTION: The exhaust emission control device for a diesel engine returns exhaust into a cylinder before combustion to control a temperature of the exhaust within a predetermined temperature range, so that cleaning effect of the exhaust is enhanced. A main DPF 40 treats a large amount of exhaust emitted in high loading, and a micro DPF 30 treats a small amount of exhaust emitted in low loading. The main DPF 40 and micro DPF 30 are provided with: a selector valve 28 switching between exhaust channels; a means for recording information controlling the selector valve 28 and an intake air restriction 24 as a map depending on an accelerator pedal depress amount and an engine speed; a control means 20 inputting the detected accelerator pedal depress amount and the engine speed and referring the map recorded in the recording means; and a control means 20 outputting information controlling the selector valve 28 and the intake air restriction 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
