Invention Grant
- Patent Title: Variable displacement compressor with an oil check valve
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Application No.: US14533686Application Date: 2014-11-05
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Publication No.: US10066618B2Publication Date: 2018-09-04
- Inventor: Matthew R. Warren
- Applicant: MAHLE International GmbH
- Applicant Address: DE Stuttgart
- Assignee: MAHLE International GmbH
- Current Assignee: MAHLE International GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Brinks Gilson & Lione
- Main IPC: F04B1/26
- IPC: F04B1/26 ; F04B53/10 ; F16K15/04 ; F04B27/18 ; F04B39/00

Abstract:
A variable displacement compressor includes a control valve and a check valve. The control valve is in fluidic communication with a discharge chamber of the compressor and a crankcase of the compressor. The check valve is interposed between the control valve and the discharge chamber. The check valve is configured to allow flow from the discharge chamber to the control valve and to prevent flow from the control valve to the discharge chamber. The check valve includes a ball and a spring. The spring is configured to urge the ball toward a closed position. The spring is characterized by a rate of the spring and a free-length of the spring, and the rate and the free-length are selected to minimize de-stroke noise caused by a rapid change of the compressor operation to a low displacement state.
Public/Granted literature
- US20160123321A1 VARIABLE DISPLACEMENT COMPRESSOR WITH AN OIL CHECK VLAVE Public/Granted day:2016-05-05
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