| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique capable of promptly adjusting supercharging pressure to a target value even when an exhaust gas control device for an internal combustion engine is equipped with a low-pressure EGR device. <P>SOLUTION: This exhaust gas control device for the internal combustion engine is provided with a variable displacement type turbocharger 5 having a turbine 5b on an exhaust passage 4, a compressor 5a on an intake passage 3 and a nozzle vane adjusting a passage cross sectional area of exhaust gas; a low-pressure EGR passage 31 for recirculating exhaust gas from the exhaust passage 4 in the downstream side of the turbine 5b to the intake passage 3 in the upstream side of the compressor 5a; a low-pressure EGR gas amount estimating means 20 for estimating EGR gas amount flowing on the low-pressure EGR passage 31; and a feedback gain adjusting means 20 for adjusting a feedback gain based on EGR gas amount estimated by the low-pressure EGR gas amount estimating means 20 when feedback control of the pressure inside the intake passage 3 is performed by adjusting an opening of the nozzle vane. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
