Method and system for controlling ignition timing for internal combustion engine
First Claim
1. An ignition timing control system for an internal combustion engine comprising:
- basic ignition timing setting means for setting a basic ignition timing of the engine;
means for setting a target value of an engine speed while the engine is in idling condition;
correcting means for determining an ignition timing correction value depending upon a difference between said target value and a detected engine speed and correcting the basic ignition timing with said ignition timing correction value; and
control means for controlling said engine with the corrected ignition timing after the engine speed becomes higher than or equal to a predetermined value.
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Accused Products
Abstract
In a control system for an ignition timing of an internal combustion engine and a control method for the ignition timing, a basic ignition timing of the engine is set, an engine speed is detected, a target value of the engine speed is set while the engine is in idling condition, an ignition timing correction amount is determined depending upon a difference of the target value and a detected engine speed while the engine is in idling condition, the basic ignition timing is corrected with the correction amount, and after the engine speed becomes higher than or equal to a predetermined value, the engine is controlled with the corrected ignition timing.
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Citations
36 Claims
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1. An ignition timing control system for an internal combustion engine comprising:
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basic ignition timing setting means for setting a basic ignition timing of the engine; means for setting a target value of an engine speed while the engine is in idling condition; correcting means for determining an ignition timing correction value depending upon a difference between said target value and a detected engine speed and correcting the basic ignition timing with said ignition timing correction value; and control means for controlling said engine with the corrected ignition timing after the engine speed becomes higher than or equal to a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13, 14, 15, 16, 17, 18, 19, 20, 25, 26, 31, 33)
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8. An ignition timing control system for an internal combustion engine comprising:
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basic ignition timing setting means for setting a basic ignition timing of the engine; driving condition detecting means including a sensor for detecting an engine speed; means for setting a target value of an engine speed while the engine is in idling condition; correcting means for determining an ignition timing correction value depending upon a difference between said target value and a detected engine speed and correcting the basic ignition timing with said ignition timing correction value; monitoring means for detecting variation speed of taking-up of the engine speed upon starting-up of said engine; and control means for controlling said engine with the corrected ignition timing after the engine speed becomes higher than or equal to a predetermined value. - View Dependent Claims (9, 10, 11, 12)
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21. An ignition timing control system for an internal combustion engine comprising:
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basic ignition timing setting means for setting a basic ignition timing of the engine; driving condition detecting means including a sensor for detecting an engine speed; means for setting a target value of an engine speed while the engine is in idling condition; correcting means for determining an ignition timing correction value depending upon a difference between said target value and a detected engine speed and correcting the basic ignition timing with said ignition timing correction value; monitoring means for detecting variation speed of taking-up of the engine speed upon starting-up of said engine; correction amount variation speed restricting means for setting variation of said ignition timing correction amount to said maximum variation amount when variation amount of said ignition timing correction amount per predetermined period or per predetermined engine speed is greater than predetermined maximum variation amount; means for detecting lowering speed variation of said engine speed; and correction restricting means for restricting the correction amount of said ignition timing or inhibiting correction when said lowering speed variation is greater than or equal to the predetermined value and said engine speed is higher than said predetermined engine speed, said correction restricting means preferentially functioning before operation of said correction amount variation speed restricting means. - View Dependent Claims (22, 23, 24, 32)
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27. An ignition timing control system for an internal combustion engine comprising:
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basic ignition timing setting means for setting a basic ignition timing of the engine; driving condition detecting means including a sensor for detecting an engine speed; means for setting a target value of an engine speed while the engine is in idling condition; correcting means for determining an ignition timing correction value depending upon a difference between said target value and a detected engine speed and correcting the basic ignition timing with said ignition timing correction value; monitoring means for detecting variation speed of taking-upon of the engine speed upon starting-up said engine; correction amount variation speed restricting means for setting variation of said ignition timing correction amount to said maximum variation amount when variation amount of said ignition timing correction amount per predetermined period or per predetermined engine speed is greater than predetermined maximum variation amount; one of valve open speed detecting means for detecting valve opening speed of a throttle valve of said engine, load increasing speed detecting means for detecting increasing speed of an engine load, and engine speed variation detecting means for detecting increasing speed of the engine speed; acceleration judgment means for detecting accelerating state of the engine on the basis of the result of detection of any one of said valve open speed detecting means, said load increasing speed detecting means and said engine speed variation detecting means, and correction restricting means for restricting correction amount or inhibiting correction when accelerating condition is judged; and correction restricting means for restricting the correction amount of said ignition timing or inhibiting correction when said lowering speed variation is greater than or equal to the predetermined value and said engine speed is higher than said predetermined engine speed, said correction restricting means preferentially functioning before operation of said correction amount variation speed restricting means. - View Dependent Claims (28, 29, 30)
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34. A method for controlling an ignition timing of an internal combustion engine comprising the steps of:
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setting a basic ignition timing of the engine; detecting an engine speed; setting a target value of the engine speed when the engine is in idling condition; determining an ignition timing correction value detecting upon a difference between said target value and the engine speed while the engine is in idling condition; correcting the value of said basic ignition timing with said correction value; and controlling the engine with the corrected ignition timing when the engine speed becomes higher than or equal to a predetermined value. - View Dependent Claims (35, 36)
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Specification