Patent ID: 11965498
Assignee: ZF CV SYSTEMS EUROPE BV
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 5:
6. A method for operating a pressure control system having a multi-stage compressor, the method comprising:
operating in an open mode in which a pressure medium for the multi-stage compressor is drawn from an ambient environment by: flowing the pressure medium into the multi-stage compressor from the ambient environment; compressing the pressure medium with a first stage of the multi-stage compressor and a second stage of the multi-stage compressor that compresses an output of the first stage of the multi-stage compressor; and outputting the compressed pressure medium from the multi-stage compressor; and
operating in a closed mode in which the pressure medium for the multi-stage compressor is drawn from the pressure control system by: flowing the compressed pressure medium into the first stage of the multi-stage compressor from at least one of a pressure medium reservoir or a pressure medium chamber of the pressure control system; compressing the compressed pressure medium with the first stage of the multi-stage compressor to generate a further compressed pressure medium; and outputting the further compressed pressure medium from the multi-stage compressor without compressing the further compressed pressure medium with the second stage of the multi-stage compressor,
wherein the first compression stage and the second compression stage of the multistage compressor are driven by a single motor.