Apparatus and method for detecting intake air mass flow rate
US4589279A · kind A · utility
18Cited by
11References
4Claims
0Family size
Assignee
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Key dates
| Filing date | May 13, 1985 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | May 13, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3287
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for detecting an intake air mass flow rate using a Karman vortex air flow arranged in an intake passage of an internal combustion engine, in accordance with the formula: EQU .gamma.(x)=.gamma.(760).times.V.sub.p (x)/V.sub.p (760) where .gamma.(x) is an intake air density to be obtained; .gamma.(760) is the air density under standard atmospheric pressure, V.sub.p (x) is the amplitude value of the analog signal obtained from the Karman vortex air flow sensor; and V.sub.p (760) is the amplitude value of the analog signal under standard atmospheric pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.