Pressure shifted valve timing
Abstract
A hydraulic pump-motor includes a cylinder block including a plurality of fluid chambers, a piston in each of the fluid chambers, a cam, a fixed valve area profile, and a timing adjustment actuator. The cam includes a cam surface that engages the pistons and drives movement of the pistons relative to the fluid chambers in response to relative rotation between the cam and the fluid chambers. The fixed valve area profile is configured to control fluid flows between the fluid chambers and first and second ports. The timing adjustment actuator is configured to adjust an angular orientation of the fixed valve area profile relative to an angular orientation of the cam based on a pressure differential between a pressure at the first port and a pressure at the second port.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 2222340
- Patent Number(s):
- 11761357
- Application Number:
- 17/471,645
- Assignee:
- Regents of the University of Minnesota (Minneapolis, MN)
- DOE Contract Number:
- EE0008335
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 09/10/2021
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Boyce-Erickson, Grey C., Van de Ven, James D., and Chase, Thomas R. Pressure shifted valve timing. United States: N. p., 2023.
Web.
Boyce-Erickson, Grey C., Van de Ven, James D., & Chase, Thomas R. Pressure shifted valve timing. United States.
Boyce-Erickson, Grey C., Van de Ven, James D., and Chase, Thomas R. Tue .
"Pressure shifted valve timing". United States. https://www.osti.gov/servlets/purl/2222340.
@article{osti_2222340,
title = {Pressure shifted valve timing},
author = {Boyce-Erickson, Grey C. and Van de Ven, James D. and Chase, Thomas R.},
abstractNote = {A hydraulic pump-motor includes a cylinder block including a plurality of fluid chambers, a piston in each of the fluid chambers, a cam, a fixed valve area profile, and a timing adjustment actuator. The cam includes a cam surface that engages the pistons and drives movement of the pistons relative to the fluid chambers in response to relative rotation between the cam and the fluid chambers. The fixed valve area profile is configured to control fluid flows between the fluid chambers and first and second ports. The timing adjustment actuator is configured to adjust an angular orientation of the fixed valve area profile relative to an angular orientation of the cam based on a pressure differential between a pressure at the first port and a pressure at the second port.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2023},
month = {9}
}
Works referenced in this record:
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patent-application, March 2012
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Valve Timing and Area Profile Selection for Hydraulic Pumps and Motors
conference, September 2020
- Boyce-Erickson, Grey C.; Chase, Thomas R.; Van de Ven, James D.
- BATH/ASME 2020 Symposium on Fluid Power and Motion Control
Compressed gas energy storage system
patent, September 2017
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- US Patent Document 9,759,239
High-Efficiency Energy-Conversion Based on Fluid Expansion and Compression
patent-application, January 2012
- McBride, Troy O.; Scott, Michael Neil; Modderno, Jeffrey
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