Screw compressor for a utility vehicle

Patent metadata

Field	Value
Publication number	US-11085447-B2
Application number	US-201716331267-A
Country	US
Kind code	B2
Filing date	Sep 19, 2017
Priority date	Sep 21, 2016
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A screw compressor system for a utility vehicle includes at least one screw compressor and at least one control and/or regulation unit for controlling and regulating the screw compressor. The control and/or regulation unit is designed such that the screw compressor is prevented, for a determined period of time, from re-starting after being stopped.

First claim

What is claimed is:

1. A screw compressor system for a utility vehicle, comprising:
at least one screw compressor;
an open-loop and/or closed-loop control unit for open-loop and/or closed-loop drive control of the screw compressor, wherein the open-loop and/or closed-loop control unit is configured such that the screw compressor is, after a stoppage, prevented from restarting for a predetermined time period;
at least one relief valve, wherein the relief valve is dimensioned such that an interior of the screw compressor can, within the time period, be relieved of pressure to a pressure which is close to atmospheric pressure or which is approximately atmospheric pressure; and
a minimum pressure valve, a bypass line, an air feed, and an air inlet, wherein the bypass line is disposed upstream of the minimum pressure valve and the bypass line leads to the relief valve, wherein air can be returned into a region of the air inlet via the relief valve, which is activated by a connection to the air feed.

2. The screw compressor system as claimed in claim 1 , wherein
the open-loop and/or closed-loop control unit is a constituent part of the screw compressor.

3. The screw compressor system as claimed in claim 1 , wherein
the open-loop and/or closed-loop control unit is a constituent part of a drive of an air treatment system of the utility vehicle.

4. The screw compressor system as claimed in claim 1 , wherein
the open-loop and/or closed-loop control unit is a constituent part of an engine or vehicle controller of the utility vehicle.

5. The screw compressor system as claimed in claim 1 , wherein
the open-loop and/or closed-loop control unit is in a form of a separate open-loop and/or closed-loop control unit.

6. The screw compressor system as claimed in claim 1 , wherein
the time period amounts to at least approximately 10 seconds.

7. The screw compressor system as claimed in claim 1 , wherein
the time period amounts to at least approximately 15 seconds.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Hebrard Gilles
• Marescot Jean-Baptiste
• Mellar Joerg
• Weinhold Thomas
• Koeck Engelbert

Classifications

• F04C18/16 Primary

  with helical teeth, e.g. chevron-shaped, screw type {(for non-parallel axes of movement F04C18/48)} · CPC title

• F04C28/24

  characterised by using valves controlling pressure or flow rate, e.g. discharge valves {or unloading valves}(F04C28/10 takes precedence) · CPC title

• F04C2270/80

  Diagnostics · CPC title

• F04C28/28

  Safety arrangements; Monitoring · CPC title

• F04C2210/221

  Air · CPC title