Ignition timing control apparatus for internal combustion engine
First Claim
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1. An ignition timing control apparatus for an internal combustion engine for a vehicle comprising:
- (a) rotation speed detecting means for detecting the rotation speed of the engine;
(b) speed changing direction discriminating means for discriminating the changing direction of the engine rotation speed;
(c) ignition timing correction quantity determining means for determining an ignition timing correction quantity corresponding to a positive or negative increment of the engine rotation speed per unit time;
(d) acceleration detecting means for detecting the operation of the engine accelerating the vehicle; and
(e) ignition timing correcting means for correcting basic ignition timing on the basis of at least a quantity of ignition timing advance or a quantity of ignition timing retardation determined by said speed changing direction discriminating means and said ignition timing correction quantity determining means after detection of the acceleration;
wherein said ignition timing correcting means corrects said basic ignition timing such that an elastic vibration of the engine generated by a step-like increment of engine torque at the time of acceleration is eliminated.
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Abstract
Disclosed is an ignition timing control apparatus for an internal combustion engine for a vehicle in which, when an acceleration is detected, a correction quantity for ignition time advance or retardation corresponding to an increment or a decrement of and the changing direction of the rotation speed is computed to correct basic ignition timing, thereby suppressing an acceleration shock or vehicle body vibration.
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Citations
10 Claims
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1. An ignition timing control apparatus for an internal combustion engine for a vehicle comprising:
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(a) rotation speed detecting means for detecting the rotation speed of the engine; (b) speed changing direction discriminating means for discriminating the changing direction of the engine rotation speed; (c) ignition timing correction quantity determining means for determining an ignition timing correction quantity corresponding to a positive or negative increment of the engine rotation speed per unit time; (d) acceleration detecting means for detecting the operation of the engine accelerating the vehicle; and (e) ignition timing correcting means for correcting basic ignition timing on the basis of at least a quantity of ignition timing advance or a quantity of ignition timing retardation determined by said speed changing direction discriminating means and said ignition timing correction quantity determining means after detection of the acceleration; wherein said ignition timing correcting means corrects said basic ignition timing such that an elastic vibration of the engine generated by a step-like increment of engine torque at the time of acceleration is eliminated. - View Dependent Claims (4, 10)
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2. An ignition timing control apparatus for an internal combustion engine for a vehicle comprising:
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(a) rotation speed detecting means for detecting the rotation speed of the engine; (b) speed changing direction discrimination means for discriminating the changing direction of the engine rotation speed; (c) ignition timing correction quantity determining means for determining an ignition timing correction quantity corresponding to a positive or negative increment of the engine rotation speed per unit time; (d) acceleration detecting means for detecting the operation of the engine accelerating the vehicle; and (e) ignition timing correcting means for correcting basic ignition timing on the basis of at least a quantity of ignition timing advance or a quantity of ignition timing retardation determined by said speed changing direction discriminating means and said ignition timing correction quantity determining means after detection of the acceleration; wherein said ignition timing correcting means operates for a predetermined period of time after detection of the acceleration. - View Dependent Claims (3, 7)
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5. An ignition timing control apparatus for an internal combustion engine for a vehicle comprising:
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(a) rotation speed detecting means for detecting the rotation speed of the engine; (b) speed changing direction discriminating means for discriminating the changing direction of the engine rotation speed; (c) ignition timing correction quantity determining means for determining an ignition timing correction quantity corresponding to a positive or negative increment of the engine rotation speed per unit time; (d) acceleration detecting means for detecting the operation of the engine accelerating the vehicle; and (e) ignition timing correcting means for correcting basic ignition timing on the basis of at least a quantity of ignition timing advance or a quantity of ignition timing retardation determined by said speed changing direction discriminating means and said ignition timing correction quantity determining means after detection of the acceleration; wherein the ignition timing correction quantity determined by said ignition timing correction quantity determining means differs from that determined when the gear position is not neutral.
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6. An ignition timing control apparatus for an internal combustion engine for a vehicle comprising:
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(a) rotation speed detecting means for detecting the rotation speed of the engine; (b) speed changing direction discriminating means for discriminating the changing direction of the engine rotation speed; (c) ignition timing correction quantity determining means for determining an ignition timing correction quantity corresponding to a positive or negative increment of the engine rotation speed per unit time; (d) acceleration detecting means for detecting the operation of the engine accelerating the vehicle; and (e) ignition timing correcting means for correcting basic ignition timing of the basis of at least a quantity of ignition timing advance or a quantity of ignition timing retardation determined by said speed changing direction discriminating means and said ignition timing correction quantity determining means after detection of the acceleration; wherein the ignition timing correction quantity determined by said ignition timing correction quantity determining means differs depending on the gear position.
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8. An ignition timing control apparatus for an internal combustion engine for a vehicle comprising:
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(a) rotation speed detecting means for detecting the rotation speed of the engine; (b) speed changing direction discriminating means for discriminating the changing direction of the engine rotation speed; (c) ignition timing correction quantity determining means for determining an ignition timing correction quantity corresponding to a positive or negative increment of the engine rotation speed per unit time; (d) acceleration detecting means for detecting the operation of the engine accelerating the vehicle; and (e) ignition timing correcting means for correcting basic ignition timing on the basis of at least a quantity of ignition timing advance or a quantity of ignition timing retardation determined by said speed changing direction discriminating means and said ignition timing correction quantity determining means after detection of the acceleration; wherein said quantity of ignition timing advance and said quantity of ignition timing retardation differ from each other.
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9. An ignition timing control apparatus for an internal combustion engine for a vehicle comprising:
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(a) rotation speed detecting means for detecting the rotation speed of the engine; (b) speed changing direction discriminating means for discriminating the changing direction of the engine rotation speed; (c) ignition timing correction quantity determining means for determining an ignition timing correction quantity corresponding to a positive or negative increment of the engine rotation speed per unit time; (d) acceleration detecting means for detecting the operation of the engine accelerating the vehicle; and (e) ignition timing correcting means for correcting basic ignition timing on the basis of at least a quantity of ignition timing advance or a quantity of ignition timing retardation determined by said speed changing direction discriminating means and said ignition timing correction quantity determining means after detection of the acceleration; wherein, when the engine is rotating at a speed lower than a predetermined value at starting time of acceleration although the acceleration is detected, the ignition timing is not corrected.
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Specification