{
  "$type": "site.standard.document",
  "description": "A motor vehicle includes a heat pump with an expansion valve and a controller that is configured to control a position of the expansion valve based, at least in part, on a superheat target, and utilize differences between an expected position of the expansion valve and a controlled position of the…",
  "path": "/patents/1381248",
  "publishedAt": "2026-04-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60H1/3213",
    "Ford Global Technologies, LLC"
  ],
  "textContent": "A motor vehicle includes a heat pump with an expansion valve and a controller that is configured to control a position of the expansion valve based, at least in part, on a superheat target, and utilize differences between an expected position of the expansion valve and a controlled position of the expansion valve to estimate a refrigerant level of the heat pump and/or a remaining useful life of the heat pump. The controller is optionally configured to determine a plurality of estimated refrigerant levels during closed loop control of the heat pump system and utilize the plurality of estimated refrigerant levels to determine a trend in refrigerant level over time.",
  "title": "REFRIGERANT LOSS PROGNOSTIC STRATEGY FOR HEAT PUMPS OF VEHICLES"
}