Back to results
US 2019/0093582 A1Published application
Active tuning system for engine control unit using airflow meter table
AssigneeHondata, Inc.
InventorDerek Stevens
Life of this patent
Estimating the term…
Abstract
A method for an engine control unit to conduct real time updating of data tables based on feedback from the air flow sensor without external computing. The air fuel ratio is based on information received from an air flow meter, where a look-up table is actively tuned for the air flow calibration instead of the volumetric efficiency tables. Here, the look-up table involves a single dimension value so the calculations are simpler than more complex evaluations previously set forth.
Claims2
A method for updating an automotive fuel injection system of a combustion engine during active tuning, comprising:
- reading an air flow meter for determining a measured air flow entering the combustion engine;
- recalling a target lambda (air-to-fuel ratio) value using the lambda value from one of a look-up table and an engine control unit calculated value;
- determining if a difference between a current lambda value and the target lambda value is present;
- adjusting the look-up table lambda adjustment value based on the difference between the current lambda value and the target lambda value;
- replacing the lambda adjustment value for the air flow in the look-up table with the adjusted lambda value;
- and
- wherein the air to fuel table values are checked when updating to ensure that successive values are larger than the preceding values.
4 more elements
(canceled)
Dependencies are inferred from the claim text.