Patent ID: 9403416
Filing Date: 2016-08-02
CPC Classification: B60H,F25B,G01M

Claim Text:
1. A method for detecting a fault in a cooling circuit of a motor vehicle that includes in a flow direction of a refrigerant, a compressor, a condenser, an expansion device, and an evaporator, the method comprising: (a) measuring a first refrigerant pressure when the compressor is turned off; (b) turning on the compressor; (c) measuring a second refrigerant pressure after a predetermined time interval, wherein the predetermined time interval is sufficient to allow the compressor to establish a constant pressure in the cooling circuit; (d) forming a differential value from the second refrigerant pressure and the first refrigerant pressure; and (e) comparing the differential value with at least one reference value for detecting a fault in the cooling circuit.