Method and apparatus for controlling vehicular air-conditioning system
US5983650A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Sep 2, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D29/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In order to effectively perform on/off control for an air-conditioning system carried on an automobile during idling operation of the automobile, if a state, in which a difference between a target idling number of revolution and a net idling number of revolution is larger than a preset difference value, is continued for a preset period of time, then an electromagnetic clutch is disconnected, and a compressor is allowed to be in an operation stop state. After that, if the difference is smaller than the preset difference value, and a state, in which the difference is smaller than the preset difference value, is continued for a preset period of time, then the electromagnetic clutch is connected, and the compressor is restored to be in an operating state. By doing so, it is possible to previously avoid the occurrence of vibration of the vehicle body due to vibration of the engine, and the occurrence of booming noise in the vehicle's cabin caused by the vibration. The air-conditioning system is automatically restored to be in the operating state when it is judged that the state of the engine is restored. Therefore, the convenience of use of the air-conditioning system is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.