Patent ID: 11945446
Assignee: HITACHI ASTEMO, LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 0:
1. A control device comprising:
a requested torque calculation unit which calculates requested torque on a basis of a driving state of a vehicle;
a requested torque change amount calculation unit which calculates an amount of change in requested torque per unit time as a requested torque change amount;
an estimated generation torque calculation unit which calculates an estimated generation torque estimated as being generated by a drive source of the vehicle;
an estimated generation torque change amount calculation unit which calculates an amount of change in estimated generation torque per unit time as an estimated generation torque change amount; and
an abnormality detection unit which detects an abnormality of the drive source on a basis of an integrated value of a difference between the requested torque change amount and the estimated generation torque change amount, and outputs abnormality determination for the drive source, wherein
the requested torque calculation unit is an allowable generation torque calculation unit which calculates allowable generation torque that is generatable by the drive source,
the requested torque change amount calculation unit is an allowable generation torque change amount calculation unit which calculates an amount of change in allowable generation torque per unit time as an allowable generation torque change amount,
the abnormality detection unit detects the abnormality of the drive source on a basis of a result of comparing an integrated value of a difference between the allowable generation torque change amount and the estimated generation torque change amount with a threshold value determined from an operation state of the drive source,
the abnormality detection unit determines that abnormality detection is permitted in a case where the difference between the allowable generation torque change amount and the estimated generation torque change amount is larger than a permission determination threshold value, calculates, as an abnormality detection time, a time in which it is determined that the abnormality detection is permitted, and continues the calculation of the abnormality detection time until the abnormality detection time reaches an abnormality determination time threshold value,
the abnormality detection unit calculates the integrated value while the abnormality detection is permitted, detects the abnormality of the drive source when the integrated value is larger than an abnormality determination threshold value determined on a basis of the operation state of the drive source, and outputs the abnormality determination,
the allowable generation torque change amount calculation unit calculates a plurality of different allowable generation torque change amounts per unit time with the same starting point,
the estimated generation torque change amount calculation unit calculates a plurality of different estimated generation torque change amounts per unit time with the same starting point, and
the abnormality detection unit determines that the abnormality detection is permitted when a difference between the allowable generation torque change amount and the estimated generation torque change amount calculated for each same unit time is larger than the permission determination threshold value.