| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust recirculation system of an internal combustion engine which prevents generation of condensed water and ensures NOx reduction effect. <P>SOLUTION: The exhaust recirculation system of the internal combustion engine includes an HPL-EGR device 16, an LPL-EGR device 17 and an ECU 50 for controlling both EGR devices 16, 17 and controlling high pressure side and low pressure side exhaust gas, respectively. The ECU 50 includes a condensed water amount estimation part 51 for estimating the amount of condensed water in a low pressure side exhaust recirculation path L2, and a recirculation ratio control part 52 for variably controlling a ratio of both high and low pressure side exhaust gas recirculation amounts so as to reduce the ratio of both recirculation amounts when a condensed water amount exceed a reference water amount set in advance as compared with when not exceeding the reference water amount. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
