Variable pressure limiting for variable displacement pumps
US9416779B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Jun 29, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/09
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Method of controlling multiple variable displacement hydraulic pumps determined relative to operator commands. If non-second-pump-dominated command, a respective adjusted displacement request is determined based upon the lesser of the operator requested torque limited displacement and an adjusted torque limited displacement that calculated based upon and the torque limited displacement of the respective pump and a scaling factor calculated based upon the first relief valve set pressure and respective pump pressure. If second-pump-dominated command, the set pressure of a relief valve associated with one of the pumps is instead utilized in calculating the scaling factor in the above strategy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.