Patent ID: 11906985
Assignee: AVENTICS GMBH
Field: Control (Instruments)
Classification: CPC G  F | IPC F  G

Claim 5:
6. A method for controlling a pressure of a fluid by a valve assembly, the method comprising:
controlling an opening cross section of a proportional valve of the valve using an actuator;
sensing, using a sensor, a valve output pressure of the proportional valve, wherein a switching valve of the valve assembly is arranged parallel to the proportional valve, wherein an opening cross section of the switching valve is smaller than a maximum opening cross section of the proportional valve;
automatically calculating at a running time, using a digital controlling device, a working pressure achievable as a maximum with the proportional valve when the proportional valve is at a maximum opening cross section based on a currently given valve output pressure and a current position of the actuator;
comparing the calculated working pressure with a predefinable target working pressure; and
generating a manipulated variable for an additional opening of the switching valve when the calculated maximum achievable working pressure falls below a predefinable target working pressure by a determinable deviation value.