| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an EGR device capable of removing a deposit more reliably and realizing a miniaturization.SOLUTION: An EGR device comprises: an EGR pipe 19; an EGR cooler 27; and a by-pass pipe 21. A three-way valve 29 is disposed at a confluence position between the EGR pipe 19 and the bypass pipe 21. The three-way valve 29 is controlled by a controller 31. In response to an efficiency recovery execution signal, the controller 31 reduces the flow rate of a cooler passing exhaust gas so that condensed water may be produced in the EGR cooler 27 by a cooler passage exhaust gas. Moreover, the controller 31 ends the efficiency recovery processing in response to an efficiency recovery end signal.</p> |
