System and method for establishing a mass flow rate of air entering an engine
US8424372B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2011 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Sep 15, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of establishing a mass flow rate of air entering an engine includes establishing an input voltage by an energy supply device to energize a mass-air-flow sensor. The method also includes generating an output frequency via the mass-air-flow sensor in response to the mass flow rate of air entering the engine and determining the flow rate using the generated output frequency. The method additionally includes comparing the generated output frequency with a predetermined threshold output frequency that corresponds to the established input voltage. Additionally, the method includes selecting the determined flow rate as the established flow rate if the generated output frequency is at or below the predetermined threshold output frequency. Furthermore, the method includes selecting a predetermined alternative algorithm to generate the established flow rate if the generated output frequency is above the predetermined threshold output frequency. A system for establishing the mass flow rate is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.