Diagnosis and controls of a fluid delivery apparatus with hydraulic buffer
US9132442B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 10, 2012 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M63/0225
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid delivery apparatus for delivering fluid according to a fluid delivery rate command including a fluid tank, a pump, a buffer, in which a pressure sensor is positioned, an injector, a pump controller, a fluid delivery controller, and a diagnostic controller. When a motor driven pump is used, the diagnostic controller is able to detect issues by comparing a measured pressure change with an expected value calculated using pressure sensing values and the power applied to the motor. If an air driven pump is employed, pressure sensing values, fluid delivery rate commands, and pump operating status can be used for calculating compressed air volume in the pump and trapped air volume in the buffer, and for further triggering pressing and suction strokes of the air driven pump, diagnosing issues in the fluid delivery apparatus, detecting fluid level in the fluid tank, and refilling trapped air in the buffer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.