Displacement control apparatus for variable displacement compressor, displacement control method and compressor module
US6484520B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Feb 27, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B27/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A displacement control apparatus controls the displacement of a variable displacement controller. A drive shaft of the compressor is driven by an engine. Torque acting on the drive shaft represents the displacement. The apparatus includes a control valve, an air conditioner controller and a compressor controller. The control valve changes the compressor displacement. The air conditioner controller produces a torque setting signal, which represents a target torque, to the compressor controller. The compressor controller changes the valve opening based on the torque setting signal such that the actual load torque matches the target torque value. Accordingly, the compressor is controlled according to the torque. The air conditioner controller may send the torque setting signal to an engine controller, which eliminates the need for load torque maps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.