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

Claim 8:
9. A control device comprising:
a requested horsepower calculation unit which calculates a requested horsepower on a basis of a driving state of a vehicle;
a requested horsepower change amount calculation unit which calculates an amount of change in requested horsepower per unit time as a requested horsepower change amount;
an estimated generation horsepower calculation unit which calculates an estimated generation horsepower estimated as being generated by a drive source of the vehicle;
an estimated generation horsepower change amount calculation unit which calculates an amount of change in estimated generation horsepower per unit time as an estimated generation horsepower 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 horsepower change amount and the estimated generation horsepower change amount, and outputs abnormality determination for the drive source, wherein
the requested horsepower calculation unit is an allowable generation horsepower calculation unit which calculates an allowable generation horsepower that is generatable by the drive source,
the requested horsepower change amount calculation unit is an allowable generation horsepower change amount calculation unit which calculates an amount of change in allowable generation horsepower per unit time as an allowable generation horsepower 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 horsepower change amount and the estimated generation horsepower 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 horsepower change amount and the estimated generation horsepower 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, and
the abnormality detection unit compares a difference abnormality detection time calculated when a difference between the estimated generation horsepower and the allowable generation horsepower is larger than a difference abnormality determination threshold value while it is determined that the abnormality detection is permitted, with a difference abnormality determination time threshold value, and determines that the difference is abnormal when the difference abnormality detection time is greater than the difference abnormality determination time threshold value.