Method for adjusting engine output power to compensate for loading due to a variable capacity air conditioning compressor
US5163399A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jan 7, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M3/07
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is described for adjusting the output power delivered by an internal combustion engine to compensate for variations in engine loading induced by a variable capacity refrigerant compressor of a vehicle air conditioning system. This is accomplished by estimating the change in engine loading due to the compressor, based upon an indication of the engine intake air temperature, and then, adjusting the setting of an engine output power control mechanism, in accordance with the estimate. An estimate for the change in engine loading induced when starting or stopping the variable capacity compressor is derived from a schedule of values based upon the temperature of the engine intake air. An estimate for the change in engine loading induced by the off-idle operation of the variable capacity compressor is derived as a function of the difference between the intake air temperature and a retained previous value for the intake air temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.