Apparatus for determining failure of electromagnetic clutch
US6665162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2001 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Feb 1, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/7061
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus for determining a failure of an electromagnetic clutch, which is capable of properly determining whether or not a failure, a typically a layer short-circuit, has occurred due to a change in a resistance value of a solenoid coil of the electromagnetic clutch. The electromagnetic clutch is configured such that the engagement force thereof is varied according to an amount of current flowing through the coil. An output control value for control of the amount of current is calculated by feedback control such that an actual amount of current actually flowing through the coil becomes equal to a desired amount of current. A predetermined reference control value is stored which defines a standard for the output control value and has a standard relationship with respect to the amount of current. The actual amount of current is detected. The calculated output control value is compared with the predetermined reference control value corresponding to the detected actual amount of current. It is determined based on a result of the comparison by the comparison means whether or not the electromagnetic clutch has failed due to a change in a resistance value of the coil of the solenoid t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.