Method of load and speed modifying on fuel lean-out for internal combustion engines
AssigneeChrysler Corporation
InventorsChristopher P. Thomas, Gregory T. Weber, Glen E. Tallarek
Life of this patent
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Abstract
A method of load and speed modifying on fuel lean-out for an internal combustion engine includes the steps of sensing a speed of the engine, determining an engine speed modifier as a function of current sensed engine speed, sensing a manifold absolute pressure (MAP) of an intake manifold of the engine, determining an engine load modifier as a function of current sensed MAP, adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier, and applying the speed/load modifier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.
Claims6
A method of load and speed modifying on declaration fuel lean-out for an internal combustion engine, said method comprising the steps of:
- determining if conditions are right for executing said method and continuing said method if the conditions are right;
- sensing a speed of the engine;
- determining an engine speed modifier as a function of current sensed engine speed;
- sensing a manifold absolute pressure (MAP) of an intake manifold of the engine;
- determining an engine load modifier as a function of current sensed MAP;
- adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier;
- and
- applying the speed/load modifier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.
A method of load and speed modifying on fuel lean-out for an internal combustion engine, said method comprising the steps of:
- sensing a speed of the engine;
- determining an engine speed modifier as a function of current sensed engine speed;
- sensing a manifold absolute pressure (MAP) of an intake manifold of the engine;
- determining an engine load modifier as a function of current sensed MAP;
- adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier;
- and
- determining whether a throttle lean-out multiplier value is greater than or equal to a MAP lean-out multiplier;
- and
- applying the speed/load modifier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.
A method of load and speed modifying on fuel lean-out for an internal combustion engine, said method comprising the steps of:
- sensing a speed of the engine;
- determining an engine speed modifier as a function of current sensed engine speed;
- sensing a manifold absolute pressure (MAP) of an intake manifold of the engine;
- determining an engine load modifier as a function of current sensed MAP;
- adding the determined engine speed modifier and engine load modifier together to yield a speed/load modifier;
- determining whether a throttle lean-out multiplier value is greater than or equal to a MAP lean-out multiplier;
- applying the speed/load modifier to the throttle lean-out multiplier value if the throttle lean-out multiplier value is greater than or equal to the MAP lean-out multiplier value;
- applying the speed/load modifier to the MAP lean-out multiplier value if the throttle lean-out multiplier value is not greater than or equal to the MAP lean-out multiplier value;
- calculating a final proportional deceleration fuel lean-out multiplier based on the throttle lean-out multiplier and MAP lean-out multiplier values;
- and
- applying the calculated final proportional deceleration fuel lean-out multiplier value to a fuel pulsewidth value of fuel injectors for the engine and reducing the amount of fuel injected into the engine by the fuel injectors.
Dependencies are inferred from the claim text.