Diagnostic system and method to temporarily adjust fuel quantity delivered to a fuel injected engine
First Claim
1. A system to regulate fuel delivered to a fuel injected engine, comprising:
- an electronic control unit (ECU) connected to a plurality of sensors and capable of receiving data from each of the plurality of sensors and connected to a plurality of engine components of a fuel injected engine, wherein the plurality of engine components include a number of fuel injectors;
a service computer connected to the engine control unit having therein a computer readable storage medium having thereon a computer program that when executed causes the service computer to transmit signals to the ECU to temporarily control fuel quantity delivered to the fuel injected engine by changing at least one term of the third-order polynomial that defines fuel flow to a respective cylinder.
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Accused Products
Abstract
The present invention provides a system and method to adjust temporarily the quantity of fuel delivered to the cylinders of a fuel injected engine. The present invention allows a service technician to temporarily adjust the quantity of fuel being delivered to each cylinder or all cylinders of an internal combustion engine. The system includes an internal combustion engine having therein an electronic control unit capable of controlling the fuel quantity delivered to each cylinder and a general service computer connectable thereto and capable of transmitting data to the ECU. When instructed by the service technician, the service computer sends signals to the ECU to adjust fuel injector data to the fuel injectors of so as to increase or decrease the amount of fuel being delivered to the fuel injected engine.
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Citations
31 Claims
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1. A system to regulate fuel delivered to a fuel injected engine, comprising:
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an electronic control unit (ECU) connected to a plurality of sensors and capable of receiving data from each of the plurality of sensors and connected to a plurality of engine components of a fuel injected engine, wherein the plurality of engine components include a number of fuel injectors;
a service computer connected to the engine control unit having therein a computer readable storage medium having thereon a computer program that when executed causes the service computer to transmit signals to the ECU to temporarily control fuel quantity delivered to the fuel injected engine by changing at least one term of the third-order polynomial that defines fuel flow to a respective cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A diagnostic machine to modify fuel flow in a fuel injected engine of an outboard motor, comprising:
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a communication interface connectable to an ECU of an outboard motor having a fuel injected engine;
a processor connected to the communication interface capable of receiving fuel injector data from the ECU and transmitting an adjustment value to the ECU;
a computer readable storage medium having thereon a computer program that when executed by the processor causes the processor to determine the adjustment value, wherein the adjustment value is indicative of a change in fuel injector firing time of at least one identified fuel injector; and
wherein the computer program when executed causes the processor to receive fuel injector coefficients from the ECU and create a modified pulse width to modify fuel flow to at least one cylinder and the fuel flow to the at least one cylinder is defined by a third-order polynomial. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method to adjust fuel quantity delivered to a fuel injected engine comprising the steps of:
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(A) connecting a diagnostic machine to an ECU of a fuel injected engine;
(B) selecting at least one injector having an injector pulse width associated therewith;
(C) modifying the injector pulse width based upon at least one user input;
(D) transmitting the modified injector pulse width of the at least one injector to the ECU of the fuel injected engine; and
wherein the at least one injector has a fuel flow defined by a third-order polynomial. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A method to adjust fuel quantity delivered to a fuel injected engine of an outboard motor comprising the steps of:
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receiving operating parameters of a fuel injected engine;
determining fuel flow based on the operating parameters of the fuel injected engine;
modifying the fuel flow of at least one injector to temporarily adjust the fuel quantity delivered to the fuel injected engine;
wherein the step of modifying the fuel flow includes the step of adjusting a pulse width for the at least one injector and applying the adjusted pulse width to the fuel; and
changing at least one term of a third-order polynomial. - View Dependent Claims (28)
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29. A system to adjust fuel injector data of a fuel injected engine incorporated in an outboard motor comprising:
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means for communicating with an ECU of a fuel injected engine;
means for identifying and selecting at least one engine cylinder having an injector pulse width associated therewith;
means for receiving at least one user input;
means for modifying the injector pulse width by changing at least one term of a third-order polynomial; and
means for communicating the modified injector pulse width to the ECU of the fuel injected engine.
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30. A method to adjust fuel quantity delivered to a fuel injected engine comprising the steps of:
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connecting a diagnostic machine to an ECU of a fuel injected engine;
selecting at least one injector having an injector pulse width associated therewith;
modifying the injector pulse width based upon at least one user input; and
transmitting the modified injector pulse width of the at least one injector to the ECU of the fuel injected engine, wherein the at least one injector has a fuel flow defined by a third-order polynomial. - View Dependent Claims (31)
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Specification