Method and apparatus for indicating mileage corresponding to remaining fuel for vehicles
US4400779A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 1, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Apr 1, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F9/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for indicating mileage corresponding to remaining fuel for vehicles includes a microprocessor connected to receive input signals respectively indicating a traveled distance and a consumed fuel quantity in a predetermined short period. During such time when quantity of fuel remaining in the tank is above a certain threshold level, the mileage corresponding to the remaining fuel is calculated by multiplying the remaining fuel quantity by a fuel consumption (Km/l) which substantially corresponds to the average fuel consumption during a period between two recent successive fillings of the fuel tank. After the remaining quantity of fuel has reduced below the threshold level, the value of the fuel consumption is updated by increasing the weight of the momentary fuel consumption which reflects the actual running condition. The microprocessor repeatedly calculates the mileage at predetermined intervals and the numerical value of the calculated mileage corresponding to the remaining fuel is displayed on a display unit digitally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.