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

Claim 0:
1. A valve assembly for controlling a pressure of a fluid, comprising:
an actuator;
a proportional valve operably connected to the actuator, the proportional valve having an opening cross section that can be continuously varied by the actuator;
a sensor operably connected to the proportional valve and configured to sense a valve output pressure of the proportional valve;
a digital controlling device; and
a switching valve arranged parallel to the proportional valve and having an opening cross section,
wherein the opening cross section of the switching valve is smaller than a maximum opening cross section of the proportional valve,
wherein, during a running time, the digital controlling device is configured to automatically calculate a working pressure achievable as a maximum with the proportional valve when the proportional valve is configured at the maximum opening cross section based on a currently given valve output pressure from the sensor and a current position of the actuator, and
wherein the digital controlling device is further configured to open the switching valve when the calculated maximum achievable working pressure falls below a predefinable target working pressure by a determinable deviation value.