Method for identifying a change in the operating behavior of a crankshaft drive of a motor vehicle

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11988548
APP PUB NO 20210317796A1
SERIAL NO

17264696

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Abstract

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The disclosure relates to a method for identifying a change in the operating behavior of a crankshaft drive of a motor vehicle. In particular, the disclosure relates to a method for identifying error states of a torsional-vibration damper in the crankshaft drive, such as a jamming or slipping of a secondary mass of the torsional-vibration damper. The crankshaft drive comprises a crankshaft, a pulse generator that rotates when the crankshaft is in operation and a fixed sensor device, which generates a rotational speed signal N as a function of the rotational speed of the pulse generator. The method comprises the following steps: detecting a current rotational speed signal Nakt of the sensor device during operation of the crankshaft drive; filtering the current rotational speed signal Nakt using a bandpass filter that has at least one first passband range D1 comprising a first center frequency f1; comparing the filtered current rotational speed signal Nakt with a reference signal Nref stored in a memory; and identifying a change in the operating behavior of the crankshaft drive on the basis of the comparison of the filtered current rotational speed signal Nakt with the reference signal Nref. The disclosure further relates to a vehicle, such as a commercial vehicle, having a control device which is configured to perform a method of this kind.

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Patent Owner(s)

Patent OwnerAddress
MAN TRUCK & BUS SEDACHAUER STR 667 MÜNCHEN 80995

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Schmidt, Christopher Fürth, DE 33 573
Suchanek, Roman Schwabach, DE 1 1

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