Method and apparatus for measuring engine mass air flow
US4860222A · kind A · utility
19Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Jan 25, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A microprocessor based fuel control for automotive vehicle engines samples the measured air flow rate at fixed intervals and calculates the air mass flow for a cylinder interval which varies with engine speed. A sensor on the engine detects cylinder position for the cylinder interval determination. An independent clock controls the air flow rate sampling periods. During each cylinder interval the air flow rate is integrated for each whole sampling period and is approximated for each partial period at the boundaries of the cylinder interval. The results are summed to obtain the mass air flow for the cylinder interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.