Common-rail fuel injection device for e.g. direct fuel injection diesel machine, has control device estimating pressure value using changed electricity value and physical balance characteristics between forces acting on control valve

摘要

The device has a control device (5) changing a value of electricity supplied to an actuating device to determine whether a change is occurred in operating characteristics of a diesel machine, when an operating condition of a pressure sensor is not normal. The device (5) estimates a pressure value using the changed electricity value and physical balance characteristics between forces acting on a control valve, when change is occurred.