System and methods for diagnosing premature refueling shutoff
US9797809B2 · kind B2 · utility
5Cited by
17References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2013 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Jul 10, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K15/035
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for localizing restrictions in a fuel system during refueling, comprising: monitoring fuel tank pressure, fuel vapor canister temperature, and evaporative leak check module pressure during a refueling event; and responsive to a premature shutoff event, indicating a location of a restriction among a plurality of locations based on whether monitored pressure and temperature changes during the refueling event are greater than respective thresholds. In this way, the cause of a premature shutoff event may be diagnosed without requiring additional sensors within the fuel system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.