Patent ID: 8370094
Filing Date: 2013-02-05
Classification: F02D,F02M

Abstract:
1. A detecting device for a fuel injector, comprising: a sensor unit having a detection circuit which outputs a detection signal in response to a detection physical quantity representing a fuel pressure or a fuel temperature, the sensor unit provided to a fuel injector for an internal combustion engine; and a computing unit computing the detection physical quantity based on a voltage value of the detection signal relative to a reference voltage; wherein the computing unit includes a deviation computing means for computing a deviation between the reference voltage and a comparative voltage which represents an applied-voltage applied to the detection circuit, the sensor unit includes an applied-voltage adjusting means for adjusting the applied-voltage in such a manner that the computed deviation becomes smaller, the sensor unit includes a voltage transform circuit in parallel with the detection, and the voltage transform circuit generates the comparative voltage by decreasing the applied-voltage.