Method for judging the locked state of auxiliaries for automobiles
US5780731A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2007/0861
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system for detection of the load torque of auxiliaries of an automobile engine is utilized to detect a locked state of an air-conditioner refrigerant compressor, power-steering oil pump, etc. Namely, a first auxiliary torque in a state where the air-conditioner is operating is measured, and when this exceeds a predetermined value, a second auxiliary torque is measured in a state where the clutch of the compressor is disengaged. When the difference between them exceeds another predetermined value, it is judged that the compressor has locked. When the difference does not exceed the predetermined value, it is judged that the oil pump etc. has locked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.