Hydraulic pump malfunction diagnosing device
US10132307B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 11, 2015 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Aug 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A malfunction diagnosing device that includes pistons arranged in a circumferential direction and discharges oil with rotation in the circumferential direction is provided, including: a pressure sensor for detecting a pressure value of oil discharged from a hydraulic pump in rotation; a speed sensor for detecting a rotation phase of the hydraulic pump at a time when a pressure value of oil is detected by the pressure sensor; a phase calculation part; and a rendering part for rendering a model of a relationship between pressure values of oil detected by the pressure sensor and rotation phases of the hydraulic pump detected by the speed sensor and the phase calculation part to thereby obtain pulsating waveform data. This makes it possible to diagnose a malfunction of the hydraulic pump without influence of a change in a rotation speed of the hydraulic pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.