SYSTEM AND METHOD FOR SAMPLING AND PROCESSING MASS AIR FLOW SENSOR DATA

摘要

A vehicle includes an engine having cylinders in fluid communication with an intake air flow, a mass air flow (MAF) sensor positioned with respect to the intake air flow which outputs a pulse train signal describing the frequency of the intake air flow, and a controller. The controller includes a calibrated non-linear conversion curve recorded in memory. The controller executes a method to convert the frequency data into a corresponding mass air flow using the calibrated non-linear conversion curve, determines the instantaneous mass air flow value at each leading or trailing edge of the pulse train signal, and accumulates the instantaneous mass air flow values over a calibrated duration. A time-weighted average of the accumulated mass air flow values is then used to execute a control action. The controller includes a host computer device and memory storing the curve and instructions for executing the method.

主权项

1. A vehicle comprising:
an internal combustion engine having a plurality of cylinders each in fluid communication with an intake air flow; a mass air flow (MAF) sensor positioned with respect to the intake air flow, wherein the MAF sensor is configured to output a pulse train signal describing a frequency or period of the intake air flow; and a controller in communication with the MAF sensor that includes a processor and tangible, non-transitory memory on which is recorded a calibrated non-linear conversion curve; wherein the controller is configured to translate the frequency or period data into a corresponding mass air flow using the calibrated non-linear conversion curve, determine the instantaneous mass air flow value at each leading or trailing edge of the pulse train signal, accumulate the instantaneous mass air flow values over a calibrated duration, calculate a time-weighted average of the accumulated mass air flow values, and execute a control action with respect to the vehicle using the time-weighted average.