| 摘要 |
PROBLEM TO BE SOLVED: To provide a throttle valve control device which valve-closing drives a throttle valve by drive torque taking into consideration warpage at a resin-made gear mechanism and an energization force of a valve-opening spring, and can properly determine that the throttle valve reaches a full-closed position.SOLUTION: A throttle valve 3 is controlled up to a temporary full-closed position at a first valve-closing drive duty ratio DUTZ1, a minute angle THS is set according to a first warpage equivalent opening THTHR1 which corresponds to the first valve-closing drive duty ratio DUTZ1, and the throttle valve 3 is valve-opening driven by the minute angle THS from the temporary full-closed position. Next, the throttle valve 3 is mildly valve-closing driven at a second valve-closing drive duty ratio DUTZ2 which is smaller than the first valve-closing drive duty ratio DUTZ1. When there arises a state that the throttle valve opening TH which is detected in that state is not changed, it is determined that the throttle valve 3 has reached a full-closed position.SELECTED DRAWING: Figure 3 |
