Air/fuel ratio control using a display interface
AssigneeCaterpillar Inc.
InventorsGreg Hasler, Dave Zwetz
Life of this patent
Estimating the term…
Abstract
A method and apparatus for controlling an air/fuel ratio of an internal combustion engine having a programmable air/fuel ratio control. The method and apparatus includes pre-programming a coarse air/fuel ratio setting, determining a condition of the air/fuel ratio being at an undesired value, and programming a fine air/fuel ratio setting using a display interface.
Claims17
A method for controlling an air/fuel ratio of an internal combustion engine having a programmable air/fuel ratio control, including the steps of:
- pre-programming a coarse air/fuel ratio setting;
- determining a condition of the air/fuel ratio being at an undesired value;
- and
- programming a fine air/fuel ratio setting using a display interface.
An apparatus for controlling an air/fuel ratio of an internal combustion engine, comprising:
- a programmable controller electrically connected to the engine;
- a coarse air/fuel ratio setting programmed into the controller;
- a display electrically connected to the controller;
- and
- an input device interfaced with the display to provide input of a fine air/fuel ratio to the controller.
A display interface for providing control of an air/fuel ratio of an internal combustion engine, comprising:
- a display indication of a range from a maximum to a minimum air/fuel ratio;
- and
- an input interface connected to the display for selecting a fine air/fuel ratio from within the range.
A method for providing operator control of an air/fuel ratio of an engine having a pre-programmed coarse air/fuel ratio setting, including the steps of:
- visually monitoring an amount of smoke being emitted from the engine;
- determining a condition of an undesired value of air/fuel ratio as a function of the monitored smoke;
- and
- inputting into a display interface a fine air/fuel ratio setting to adjust the coarse air/fuel ratio setting to a desired value.
A method for controlling an air/fuel ratio of an internal combustion engine having a programmable air/fuel ratio control, including the steps of:
- programming a three-dimensional maximum air/fuel ratio map as a function of engine speed, engine boost pressure, and fuel delivery;
- programming a three-dimensional minimum air/fuel ratio map as a function of engine speed, engine boost pressure, and fuel delivery;
- and
- determining a range from the maximum to the minimum air/fuel ratio maps.
Dependencies are inferred from the claim text.