Brushless DC motor control and methods of operating a fuel pump
US10286345B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2016 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Mar 16, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/808
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fuel filter assembly incorporates a BLDC motor and control circuit configured to operate at a first rotational speed upon startup and switch to a second rotational speed when measured variables indicate that the filter assembly is filled with fuel. The first rotational speed is initiated as a default when power is applied to the control circuit. If the filter assembly has been serviced, it must be primed before resuming normal operation. The first rotational speed is significantly higher than the second rotational speed to reduce the amount of time necessary to prime the filter assembly. The control circuit is arranged to monitor a variable which corresponds to the torque necessary to drive the pump. When the pump is filled with air prior to priming, lower torque is required to drive the pump, which corresponds to lower current draw and power consumption at the BLDC motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.