Method and device for measuring the rotational speed of a turbocompressor, and motor vehicle
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United States of America Patent
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Sep 1, 2015
Grant Date -
Feb 27, 2014
app pub date -
Apr 5, 2012
filing date -
Apr 8, 2011
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Abstract
A method and a device for measuring the rotational speed of a turbocompressor, in particular a turbocharger of a motor vehicle. A frequency of pressure pulses generated in the medium the blades or by the shaft of the turbocompressor is measured using high-frequency signal portion of a pressure sensor, and the turbocompressor rotational speed is ascertained from the measured pressure pulse frequency. Furthermore, the charge pressure of the turbocompressor can be ascertained from the low-frequency signal of the pressure sensor so that a single sensor is sufficient for both measurements. The pressure sensor can be arranged in the intake system downstream of the compressor, upstream or downstream of an intercooler.
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