Diagnostic apparatus for fuel pump
US11371511B2 · kind B2 · utility
0Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2020 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Jan 29, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/80
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A diagnostic apparatus for a fuel pump diagnoses the state of a fuel pump based on: a correlation between a pump rotational speed that is a rotational speed of the motor and fuel pressure that is pressure of the fuel discharged from the fuel pump; and an initial correlation that is the correlation in an initial actuation period from when the fuel pump is energized for the first time to when a specified period has elapsed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.