Patent ID: 11933528
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 11:
12. The system of claim 11 wherein the system control module is configured to determine that the refrigerant is not a saturated liquid based on the pressure differential by estimating a density correction factor Δ from equation (1):

m=A√(2(1+Δ)ρ(Pin−Pout)), where: m represents expansion valve mass flow rate;
A represents expansion valve effective flow area;
ρ represents liquid refrigerant density at saturation condition;
Pin represents pressure at the expansion valve inlet; and
Pout represents pressure at the expansion valve outlet; and
wherein the system control module further comprises an estimation module, including a data processor, for estimating the density correction factor A.