Patent ID: 7463969

Claim:
An engine control device in an engine having a turbocharger having a variable capacity mechanism that includes a movable vane, comprising: first storage means that stores the quantity of soot estimated to be deposited near a movable part of the variable capacity mechanism, determined in advance in accordance with a value of a parameter expressing an engine operating condition; second storage means that stores the quantity of soot estimated to be burnt off from near the movable part, determined in advance in accordance with the value of the parameter; measurement means that measures an actual value of the parameter; first determination means that determines an estimated deposition quantity and an estimated burn off quantity of soot corresponding to the measured values of the parameter, from the first storage means and the second storage means; second determination means that determines an estimated remaining quantity of soot by obtaining the difference between the determined estimated deposition quantity and the determined estimated burn off quantity; and drive means that forcibly drives the movable vane to open and close in accordance with the determined estimated remaining quantity.