Rotational velocity determination, especially for a motor vehicle combustion engine, in which the instantaneous crankshaft rotation speed is determined by compensation of rotational velocity variations using experimental data

• Main Author: HIRN, RAINER
• Format: Patent
• Language: English; German
• Published: 21.11.2002
• Edition: 7
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; LIGHTING; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; MECHANICAL ENGINEERING; PHYSICS; TESTING; WEAPONS

Method has the following steps: (a) Scanning of a sector wheel associated with a crankshaft (3); (b) Determination of the time of travel for a sector of given size to pass a sensor; (c) Determination of operation dependent parameters from a characteristic field; (d) Compensation of periodic variations in the rotational velocity for the measured time of travel for a sector using the correction factors. The compensation factors are determined from combustion engine (1) parameters determined from measurements of the rotational velocity variations of a test bed engine. Zum Erfassen der Drehzahl bei einer Brennkraftmaschine (1) wird ein mit der Kurbelwelle (3) verbundenes Sektorenrad (4) abgetastet und die Zeitdauer des Durchlaufes eines Sektors bestimmter Größe bestimmt. Dann werden aus einem Kennfeld betriebsparameterabhängige Korrekturfaktoren entnommen, um die gemessene Zeitdauer hinsichtlich im Betrieb der Brennkraftmaschine (1) auftretender, periodischer Drehzahlschwingungen zu korrigieren.