公开(公告)号：US20210317796A1

公开(公告)日：2021-10-14

申请号：US17264696

申请日：2019-07-25

申请人： MAN Truck & Bus SE

发明人： Christopher SCHMIDT ,  Roman Suchanek

IPC分类号： F02D41/22 ,  F02D41/00 ,  G01M15/04 ,  G01M15/12

摘要： 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.

公开(公告)号：US11988548B2

公开(公告)日：2024-05-21

申请号：US17264696

申请日：2019-07-25

申请人： MAN Truck & Bus SE

发明人： Christopher Schmidt ,  Roman Suchanek

IPC分类号： G01H11/02 ,  F02D41/22 ,  F16F15/10 ,  G01M13/028 ,  G01M15/04 ,  G01M15/12 ,  F02D41/00 ,  G01M13/021

CPC分类号： G01H11/02 ,  F16F15/10 ,  G01M13/028 ,  G01M15/046 ,  G01M15/12 ,  F02D41/009 ,  F02D41/22 ,  G01M13/021

摘要： 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.