Method and apparatus for detemining the rotational speed of turbochargers

The invention relates to a method and a corresponding apparatus for detecting the rotational speed of turbochargers, especially on internal combustion engines in motor vehicles, with the steps: recording the body sound (SE) of the turbocharger and analyzing the frequency spectrum ( 30, 31, 32, 33 )...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MATASSINI LORENZO, FEKETE NICHOLAS
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CALCULATING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL COMPUTING CONTROLLING COMBUSTION ENGINES COUNTING ELECTRIC DIGITAL DATA PROCESSING HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MEASURING MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MECHANICAL ENGINEERING PHYSICS TESTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a method and a corresponding apparatus for detecting the rotational speed of turbochargers, especially on internal combustion engines in motor vehicles, with the steps: recording the body sound (SE) of the turbocharger and analyzing the frequency spectrum ( 30, 31, 32, 33 ) of the recorded body sound (SE). According to the invention, in the analysis of the frequency spectrum several frequency signals (SD1, SD2, SD3) are determined, which represent possible rotational speeds of the turbocharger, an amplitude analysis of the recorded body sound (SE) is performed in order to determine an estimated value (SD-estimate) for the turbocharger speed, and the estimated value (SD-estimate) is correlated with the several frequency signals (SD1, SD2, SD3) in order to determine the frequency signal (SD2) as the actual turbocharger rotational speed (Dactual) which correlates with the greatest probability with the obtained estimate (SD-estimate).