TURBOCHARGER ROTATION DETECTOR
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United States of America Patent
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Issued Date -
N/A
app pub date -
Jul 5, 2017
filing date -
Jul 21, 2016
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A turbocharger rotation detector includes an oscillator circuit that includes a coil generating a magnetic field inducing an eddy current in blades of a compressor wheel and outputs as a detection signal an AC signal having an amplitude varying with approach and recession of the blades, a first detector circuit for detecting, of the detection signal, a signal component of a positive voltage higher than a reference potential, a second detector circuit for detecting, of the detection signal, a signal component of a negative voltage lower than the reference potential, a first interrupter circuit that, of an output signal of the first detector circuit, interrupts a DC component, a second interrupter circuit that, of an output signal of the second detector circuit, interrupts a DC component, and a differential amplifier circuit to which the signals passing through the first and second interrupter circuits are input.
First Claim
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