Invention Grant
- Patent Title: Method for controlling pressure in a hydraulic actuator
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Application No.: US14786330Application Date: 2014-04-22
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Publication No.: US09670943B2Publication Date: 2017-06-06
- Inventor: Ralf Gomm , Dale Vanderlaan
- Applicant: Parker-Hannifin Corporation
- Applicant Address: US OH Cleveland
- Assignee: Parker-Hannifin Corporation
- Current Assignee: Parker-Hannifin Corporation
- Current Assignee Address: US OH Cleveland
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- International Application: PCT/US2014/034987 WO 20140422
- International Announcement: WO2014/176256 WO 20141030
- Main IPC: F15B21/10
- IPC: F15B21/10 ; F15B11/10 ; F15B7/00

Abstract:
In conventional load-sense systems, there is a delay between a hydraulic function being impeded by an external force and further motion of the function. This is typically due to cavitation on the low pressure side of the pump. Electro-hydraulic systems, however, typically respond very quickly because the low pressure side of the pump may be pressurized because the low-pressure side of the actuator may feed directly to the pump rather than going to tank. Thus, an operator cannot as easily rely on feedback for when a function has encountered an external load. This may result in loss of vehicle traction or other drawbacks. Therefore, provided is a system and method for mimicking a load-sense system's responsiveness using an electro-hydrostatic system via an induced passive or active time-delay.
Public/Granted literature
- US20160091004A1 METHOD FOR CONTROLLING PRESSURE IN A HYDRAULIC ACTUATOR Public/Granted day:2016-03-31
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