US4852537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition timing control apparatus for internal combustion engine
Assignee: Hitachi Ltd
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Filing: 1987-05-21
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Granted: 1989-08-01
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Expires: 2007-05-21
Abstract
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.
Inventors
- 👤 Masami Nagano
- 👤 Takeshi Atago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:18
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/1502; F02P5/1504; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
171 words
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.
Claim 2
Dependent Claim
171 words
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.
Claim 3
Dependent Claim
155 words
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 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.
Claim 4
Dependent Claim
155 words
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 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.
Claim 5
Dependent Claim
26 words
An ignition timing control apparatus according to claim 2, wherein said predetermined period of time is determined on the basis of the value of the acceleration.
Claim 6
Dependent Claim
32 words
An ignition timing control apparatus according to claim 1, wherein said ignition timing correction quantity determining means determines the ignition timing correction quantity on the basis of the value of the acceleration.
Claim 7
Dependent Claim
163 words
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 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.
Claim 8
Dependent Claim
163 words
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 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.
Claim 9
Dependent Claim
158 words
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 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.
Claim 10
Dependent Claim
158 words
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 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.
Claim 11
Dependent Claim
22 words
An ignition timing control apparatus according to claim 2, wherein said predetermined period of time is determined depending on the gear position.
Claim 12
Dependent Claim
155 words
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 quantity of ignition timing advance and said quantity of ignition timing retardation differ from each other.
Claim 13
Dependent Claim
155 words
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 quantity of ignition timing advance and said quantity of ignition timing retardation differ from each other.
Claim 14
Dependent Claim
167 words
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, 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.
Claim 15
Dependent Claim
167 words
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, 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.
Claim 16
Dependent Claim
39 words
An ignition timing control apparatus according to claim 1, wherein, when the engine is rotating at a speed higher than a predetermined value at starting time of acceleration although the acceleration is detected, the ignition timing is not corrected.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |