Remaining fuel amount measuring apparatus for a fuel tank
US5859365A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 15, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Apr 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F22/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a remaining fuel amount measuring apparatus for a fuel tank which is suited to the fuel tank designed to suppress generation of fuel vapor, a CPU actuates a piston to supply a prescribed amount of air into a pressure adjusting chamber, thereby increasing the pressure within the pressure adjusting chamber. From the Boyle's law, the increasing rate of air before air supply is inversely proportional to the volume V of the pressure adjusting chamber. Therefore, the CPU, referring to the pressure within the pressure adjusting chamber before and after the air supply, acquires the volume V of the pressure adjusting chamber, and subtracts the volume V of the pressure adjusting chamber from the internal volume of a tank body to acquire the volume of a fuel chamber, i.e. remaining fuel amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.