Position based air/fuel ratio calculation in an internal combustion engine
AssigneeKohler Co.
InventorsIsaac S. Frampton, Robert J. Danforth, III
Life of this patent
Estimating the term…
Abstract
Some embodiments relate to an internal combustion engine that includes a combustion chamber and a rotating component. The internal combustion engine further includes a sensing system that detects an angular position of the rotating component. A controller calculates a ratio between air and fuel in the combustion chamber based on the detected position of the rotating component. As an example, the rotating component may be a crankshaft where the controller calculates a speed of the crankshaft and an acceleration of the crankshaft based on the detected position of the crankshaft.
Claims18
An internal combustion engine comprising:
- a combustion chamber that includes air and fuel;
- a rotating component;
- a sensing system that detects an angular position of the rotating component;
- and
- a controller that determines a burn rate of the air and the fuel in the combustion chamber based on the angular position of the rotating component and calculates a ratio between air and fuel in the combustion chamber based on the burn rate.
A method comprising:
- receiving data indicating a volume of a combustion chamber;
- determining a burn rate based on the volume of the combustion chamber and an amount of heat released from the combustion chamber;
- and
- calculating, with a processor, a ratio between air and fuel in the combustion chamber based on the volume of the combustion chamber and the burn rate.
A method comprising:
- calculating momentary expansion acceleration of an air and fuel mixture in a combustion chamber;
- estimating a burn rate based on an amount of heat released from the air and fuel mixture in the combustion chamber based on the momentary expansion acceleration of the air and fuel mixture;
- and
- calculating a ratio between air and fuel in the combustion chamber based on the burn rate.
Dependencies are inferred from the claim text.