Engine air amount prediction based on engine position
AssigneeFord Global Technologies, LLC
InventorsDonald James Lewis, John D. Russell
Life of this patent
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Abstract
A system and method to predict engine air amount for an internal combustion engine is described. Included is a method to predict a change in engine air amount based on engine position. This method especially suited to engine starts, where engine air amount is difficult to predict due to low engine speed and limited sensor information. The system and method provides the prediction of engine air amount without extensive models or calibration. Fuel is supplied based on the predicted engine air amount.
Claims15
1-10. (cancelled)
A fuel injection controlling method for an internal combustion engine, comprising:
- during a first mode:
- counting a number cylinder events from a start of an operation of the internal combustion engine;
- calculating a first air quantity based at least on said counted number of cylinders;
- and
- adjusting delivered fuel based on said first air quantity;
- and
- during a second mode:
- calculating a second air quantity based at least on engine speed;
- and
- adjusting delivered fuel based on said second air quantity.
A fuel injection controlling method for an internal combustion engine, comprising:
- during a first mode:
- counting a number cylinder events from a start of an operation of the internal combustion engine;
- calculating a first air quantity based at least on said counted number of cylinders;
- and
- adjusting delivered fuel based on said first air quantity;
- during a second mode:
- calculating a second air quantity based at least on engine speed;
- and
- adjusting delivered fuel based on said second air quantity;
- and
- during a third mode:
- calculating a third air quantity based at least on at least a manifold pressure sensor;
- and
- adjusting delivered fuel based on said third air quantity.
A computer readable storage medium having stored data representing instructions executable by a computer to control fuel injection for an internal combustion engine, said storage medium comprising:
- instructions for calculating a first air quantity based at least on at least a manifold pressure sensor and adjusting delivered fuel based on said first air quantity during a first mode;
- and
- instructions for counting a number cylinder events from a start of an operation of the internal combustion engine, calculating an second air quantity based at least on said counted number of cylinders, and adjusting delivered fuel based on said second air quantity during a second mode occurring after said first mode.
A computer readable storage medium having stored data representing instructions executable by a computer to control fuel injection for an internal combustion engine, said storage medium comprising:
- instructions for calculating a first air quantity based at least on at least a manifold pressure sensor and adjusting delivered fuel based on said first air quantity during a first mode;
- instructions for counting a number cylinder events from a start of an operation of the internal combustion engine, calculating an second air quantity based at least on said counted number of cylinders, and adjusting delivered fuel based on said second air quantity during a second mode occurring after said first mode;
- and
- instructions for calculating a third air quantity based at least on a change in engine speed and adjusting delivered fuel based on said third air quantity during a third mode occurring after said second mode.
Dependencies are inferred from the claim text.