Electronic control strategy for A/C compressor
US6675592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Feb 2, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/21173
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for controlling a vehicle air-conditioning system for cooling an interior of a vehicle is disclosed. The vehicle air conditioning system has a compressor coupled to an electronic control valve. The method includes reading a user manipulatable switch, determining a desired vehicle interior temperature based on the read user manipulatable switch, reading a plurality of sensors indicative of an interior and an exterior climate of the vehicle, determining a heat load on the vehicle air conditioning system, determining a desired evaporator discharge temperature, evaluating a humidity level inside the vehicle by determining a humidity ratio, filtering the updated electronic control valve duty cycle to obtain a new electronic control valve duty cycle based on the desired evaporator discharge temperature, and sending the new electronic control valve duty cycle to a compressor controller, wherein the controller is in communication with the electronic control valve and commands the valve to operate at the new duty cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.