| 摘要 |
PROBLEM TO BE SOLVED: To accurately estimate an exhaust pressure even at transient time, in the case of providing an EGR device and a variable displacement turbocharger. SOLUTION: This control device is provided with a variable displacement turbocharger having a variable nozzle and an EGR valve, which can control an EGR amount, in a turbine. Here, an intake air amount Qas0 is detected by a detection means 81, a load of an engine is detected by a detection means 82, an effective area equivalent value Avnt of the variable nozzle is detected by a detection means 83, and an exhaust temperature Texh is detected by a detection means 84. These four elements are used to estimate an exhaust pressure Pexh by an estimation means 85. |
