Patent ID: 8424372
Filing Date: 2013-04-23
Classification: F02B,F02D,F02M,G01F

Abstract:
1. A method of establishing a mass flow rate of air entering an internal combustion engine, the method comprising: establishing an input voltage by an energy supply device to energize a mass-air-flow sensor configured to respond to the mass flow rate of air entering the engine; generating an output frequency via the mass-air-flow sensor in response to the mass flow rate of air entering the engine; determining the mass flow rate of air entering the engine using the generated output frequency; comparing the generated output frequency with a predetermined threshold output frequency that corresponds to the established input voltage; selecting the determined mass flow rate of air as the established mass flow rate of air entering the engine if the generated output frequency is at or below the predetermined threshold output frequency; and selecting a predetermined alternative algorithm to generate the established mass flow rate of air entering the engine if the generated output frequency is above the predetermined threshold output frequency.