Method of estimating inertia moment of engine, method of estimating engine load, and method of and apparatus for controlling engine
AssigneeDenso Corporation
InventorKatsuhiko Hirano
Life of this patent
Estimating the term…
Abstract
An inertia-related engine speed fluctuation is computed when the engine is rotated without ignition. A load-related engine speed fluctuation is computed when the engine is rotated with ignition and combustion. The inertia-related engine speed fluctuation is indicative of an inertia moment that is variable in accordance with equipments connected with the engine. The load-related engine speed fluctuation is indicative of an engine load. When estimating the engine load, the inertia-related engine speed fluctuation is considered for removing an influence of the inertia moment on the engine load. The estimated engine load is used for controlling the engine. It is possible to consider the inertia moment into an engine control.
Claims23
An apparatus for controlling an engine, comprising:
- means for controlling an ignition device for selectively stopping ignition so that the engine is in a no ignition rotation in which the engine rotates without ignition;
- means for obtaining an engine speed fluctuation based on detected engine speed;
- and
- means for estimating an inertia moment of the engine based on an inertia-related engine speed fluctuation which is the engine speed fluctuation obtained around a compression top dead center of the engine by the obtaining means when the engine is rotated without ignition.
An apparatus for controlling an engine, comprising:
- means for controlling an ignition device for selectively stopping ignition so that the engine is in a no ignition rotation in which the engine rotates without ignition;
- means for obtaining an engine speed fluctuation based on detected engine speed;
- and
- means for estimating an engine load based on an inertia-related engine speed fluctuation which is the engine speed fluctuation obtained around a compression top dead center of the engine by the obtaining means when the engine is rotated without ignition and a load-related engine speed fluctuation which is the engine speed fluctuation obtained by the obtaining means when the engine is rotated with ignition.
A method of estimating an inertia moment of an engine, comprising:
- controlling an ignition device for stopping ignition so that the engine is in a no ignition rotation in which the engine rotates without ignition;
- obtaining an engine speed fluctuation based on detected engine speed;
- and
- estimating an inertia moment of the engine based on an inertia-related engine speed fluctuation which is the engine speed fluctuation obtained around a compression top dead center of the engine by the obtaining means when the engine is rotated without ignition.
A method of estimating an engine load, comprising:
- controlling an ignition device for selectively stopping ignition so that the engine is in a no ignition rotation in which the engine rotates without ignition;
- obtaining an engine speed fluctuation based on detected engine speed;
- and
- estimating an engine load based on an inertia-related engine speed fluctuation which is the engine speed fluctuation obtained around a compression top dead center of the engine by the obtaining step when the engine is rotated without ignition and a load-related engine speed fluctuation which is the engine speed fluctuation obtained by the obtaining step when the engine is rotated with ignition.
A method of controlling an engine, comprising:
- controlling an ignition device for selectively stopping ignition so that the engine is in a no ignition rotation in which the engine rotates without ignition;
- obtaining an engine speed fluctuation based on detected engine speed;
- estimating an engine load based on an inertia-related engine speed fluctuation which is the engine speed fluctuation obtained around a compression top dead center of the engine by the obtaining step when the engine is rotated without ignition and a load-related engine speed fluctuation which is the engine speed fluctuation obtained by the obtaining step when the engine is rotated with ignition;
- and
- controlling ignition timing or fuel amount based on the engine toad estimated in the estimating step.
An apparatus for controlling an engine, comprising:
- means for controlling an ignition device for selectively stopping ignition so that the engine is in a no ignition rotation in which the engine rotates without ignition;
- means for obtaining an inertia-related engine speed characteristic which appears on the engine speed when the engine is rotated without ignition;
- means for controlling the engine based on an inertia moment indicated by the inertia-related engine speed characteristic.
Dependencies are inferred from the claim text.