Apparatus configured to estimate quantity of fuel stored in vehicle
US7942042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2009 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Jul 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/804
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus, configured to estimate quantity of fuel stored in a vehicle, includes: a fuel tank; a fuel quantity measure; a filtering processor; a filter gain setter, configured to set a filter gain; and a vehicle status detector, configured to detect which one of a starting state, a halted state, a state achieved immediately after stoppage of the vehicle, and a traveling state, wherein the filter gain setter sets: a first gain as the filter gain when the vehicle is the starting state; a second gain as the filter gain, which is larger than the first gain, when the vehicle is in the traveling state or the state achieved immediately after stoppage of the vehicle; and a third gain as a filter gain, which is larger than the first gain and smaller than the second gain, when the vehicle is in the halted state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.