US4711218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acceleration enrichment fuel control
Assignee: Motors Liquidation Co
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Filing: 1987-02-05
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Granted: 1987-12-08
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Expires: 2007-02-05
Abstract
Abstract Acceleration enrichment for an internal combustion engine is provided in response to the rate of change of an unfiltered measurement of throttle position at the lower engine speeds and in response to the rate of change of a filtered measurement of throttle position at the higher engine speeds.
Inventors
- 👤 Daniel F. Kabasin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:45
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/10; F02D41/045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A fuel supply system for an internal combustion engine having a throttle for controlling its air input, the engine being characterized in that its steady state operating fuel requirements vary from its transient operating fuel requirements, the fuel supply system comprising: means for measuring engine speed; means for measuring throttle position; means for filtering the measured throttle position; means for sensing an engine transient operating condition representing an engine acceleration enrichment fuel requirement in response to (A) the rate of change in the measured throttle position when the engine speed is less than a predetermined threshold and (B) the rate of change in the filtered throttle position when the engine speed is greater than the predetermined threshold; and means for supplying acceleration enrichment fuel to the engine when an engine transient operating condition is sensed, whereby the transient operating fuel requirements of the engine are provided in response to changes in the throttle position over the full operating speed range of the engine.
Claim 2
Dependent Claim
163 words
A fuel supply system for an internal combustion engine having a throttle for controlling its air input, the engine being characterized in that its steady state operating fuel requirements vary from its transient operating fuel requirements, the fuel supply system comprising: means for measuring engine speed; means for measuring throttle position; means for filtering the measured throttle position; means for sensing an engine transient operating condition representing an engine acceleration enrichment fuel requirement in response to (A) the rate of change in the measured throttle position when the engine speed is less than a predetermined threshold and (B) the rate of change in the filtered throttle position when the engine speed is greater than the predetermined threshold; and means for supplying acceleration enrichment fuel to the engine when an engine transient operating condition is sensed, whereby the transient operating fuel requirements of the engine are provided in response to changes in the throttle position over the full operating speed range of the engine.
Claim 3
Independent Claim
159 words
The method of supplying the acceleration transient fuel requirements of an internal combustion engine having a throttle for controlling its air input, the engine being characterized in that its steady state operating fuel requirements vary from its transient operating fuel requirements, the method comprising the steps of: measuring engine speed; measuring throttle position; filtering the measured throttle position; sensing an engine transient operating condition representing an engine acceleration enrichment fuel requirement in response to (A) the rate of change in the measured throttle position when the engine speed is less than a predetermined threshold and (B) the rate of change in the filtered throttle position when the engine speed is greater than the predetermined threshold; and supplying acceleration enrichment fuel to the engine when an engine transient operating condition is sensed, whereby the transient operating fuel requirements of the engine are provided in response to changes in the throttle position over the full operating speed range of the engine.
Claim 4
Independent Claim
159 words
The method of supplying the acceleration transient fuel requirements of an internal combustion engine having a throttle for controlling its air input, the engine being characterized in that its steady state operating fuel requirements vary from its transient operating fuel requirements, the method comprising the steps of: measuring engine speed; measuring throttle position; filtering the measured throttle position; sensing an engine transient operating condition representing an engine acceleration enrichment fuel requirement in response to (A) the rate of change in the measured throttle position when the engine speed is less than a predetermined threshold and (B) the rate of change in the filtered throttle position when the engine speed is greater than the predetermined threshold; and supplying acceleration enrichment fuel to the engine when an engine transient operating condition is sensed, whereby the transient operating fuel requirements of the engine are provided in response to changes in the throttle position over the full operating speed range of the engine.
Claim 5
Independent Claim
116 words
A system for detecting a transient operating condition of an internal combustion engine to initiate acceleration fuel enrichment, the engine having a throttle for controlling its air input, the system comprising, in combination: means for measuring engine speed; means for measuring throttle position; means for filtering the measured throttle position; means for indicating a transient operating condition while the engine speed is less than a predetermined speed when the rate of change in the measured throttle position exceeds a first predetermined rate; and means for indicating a transient operating condition while the engine speed is greater than the predetermined speed when the rate of change in the filtered measured throttle position exceeds a second predetermined rate.
Claim 6
Independent Claim
116 words
A system for detecting a transient operating condition of an internal combustion engine to initiate acceleration fuel enrichment, the engine having a throttle for controlling its air input, the system comprising, in combination: means for measuring engine speed; means for measuring throttle position; means for filtering the measured throttle position; means for indicating a transient operating condition while the engine speed is less than a predetermined speed when the rate of change in the measured throttle position exceeds a first predetermined rate; and means for indicating a transient operating condition while the engine speed is greater than the predetermined speed when the rate of change in the filtered measured throttle position exceeds a second predetermined rate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |