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US 10,866,019 B2Granted
Method and system for operating a heat pump of a vehicle
AssigneeFord Global Technologies, LLC
InventorsTimothy Noah Blatchley, James George Gebbie, Clay Wesley Maranville, Angel Fernando Porras
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Abstract
Methods and systems for providing control of a heat pump of a motor vehicle are presented. In one operating mode, speed of a heat pump compressor is controlled responsive to an outlet pressure of the heat pump compressor. In a second operating mode, speed of the heat pump compressor is controlled responsive to a pressure ratio between an inlet and an outlet of the heat pump compressor.
Claims11
A vehicle system, comprising:
- a refrigerant loop including a compressor;
- an interior heat exchanger in fluid communication with the compressor;
- an exterior heat exchanger in fluid communication with the compressor;
- a first pressure sensor coupled to a conduit at an outlet side of the compressor;
- and
- a controller including executable instructions stored in non-transitory memory to:
- while the exterior heat exchanger is operating under a first condition as an evaporator and while a flow of refrigerant to the interior heat exchanger is inhibited, adjust a speed of the compressor in a first mode based on a pressure ratio across an outlet of the compressor and an inlet of the compressor;
- and
- while the exterior heat exchanger is operating as a condenser and while the interior heat exchanger is operating as an evaporator, adjust the speed of the compressor in a second mode based on a pressure at the outlet of the compressor and not a pressure at the inlet of the compressor;
- where the first mode is different from the second mode.
7 more elements
Dependencies are inferred from the claim text.