Method and apparatus for trimming an internal combustion engine
First Claim
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1. A fuel injection control system for trimming an engine in a steady state so that a plurality of injectors contained therein operate in a pre-selected mode, the apparatus comprising:
- an engine speed sensor;
an engine load sensor;
an electronic control module in electrical communication with the engine speed sensor and the engine load sensor;
wherein the electronic control module is operable, upon determining that the engine speed and load are in a steady state, to select a previously unselected injector;
to determine the operating mode of the selected injector;
to record the operating mode of the selected injector;
to sequentially repeat the operations of selecting a previously unselected injector;
to determine the operating mode of the selected injector and record the operating mode of the selected injector for each of the plurality of injectors;
to compare the recorded operating mode of each injector to the pre-selected operating mode to determine which of the selected injectors is not operating in the pre-selected operating mode; and
to change the detected operating mode to the pre-selected mode for each of the injectors determined to be operating in other than the pre-selected operating mode.
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Abstract
A fuel injection control system and method for trimming an internal combustion engine during a fuel injection event based upon engine operating conditions, the control system including an electronic controller in electrical communication with the engine, the controller being operable to detect the operating mode of each injector of the engine and alter each injector operating mode as desired.
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Citations
15 Claims
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1. A fuel injection control system for trimming an engine in a steady state so that a plurality of injectors contained therein operate in a pre-selected mode, the apparatus comprising:
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an engine speed sensor;
an engine load sensor;
an electronic control module in electrical communication with the engine speed sensor and the engine load sensor;
wherein the electronic control module is operable, upon determining that the engine speed and load are in a steady state, to select a previously unselected injector;
to determine the operating mode of the selected injector;
to record the operating mode of the selected injector;
to sequentially repeat the operations of selecting a previously unselected injector;
to determine the operating mode of the selected injector and record the operating mode of the selected injector for each of the plurality of injectors;
to compare the recorded operating mode of each injector to the pre-selected operating mode to determine which of the selected injectors is not operating in the pre-selected operating mode; and
to change the detected operating mode to the pre-selected mode for each of the injectors determined to be operating in other than the pre-selected operating mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for trimming an engine having at least one injector controllable by an electronic control signal, the engine having an engine speed and load, the method comprising:
detecting an operating mode of each injector. - View Dependent Claims (10, 11, 12, 13, 14, 15)
Specification