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US4249498A
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Apparatus for correcting a fuel apportionment signal in an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1979-03-27
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Granted: 1981-02-10
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Expires: 1999-03-27
Abstract
Abstract Apparatus for correcting the fuel apportionment signal in an internal combustion engine during an alteration in quantity of the fuel which includes a first storage device charged according to the rpm, the storage value of which determines the content of a second storage device in accordance with certain time intervals and according to a specific function and the alteration signal of the second storage device is used for the correction of the fuel apportionment signal.
Inventors
- 👤 Ulrich Drews
- 👤 Hans Schnurle
- 👤 Michael Horbelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:42
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
Apparatus for correcting a fuel apportionment signal in an internal combustion engine during a change in quantity comprising, in combination, a first storage device, means for charging said first storage device in accordance with rpm to provide a stored value, a second storage device for providing a periodic alteration signal, means including said stored value for determining the content of said second storage device during certain time intervals and according to a certain function and means including the alteration signal of said second storage device for correcting the fuel apportionment signal.
Claim 2
Dependent Claim
91 words
Apparatus for correcting a fuel apportionment signal in an internal combustion engine during a change in quantity comprising, in combination, a first storage device, means for charging said first storage device in accordance with rpm to provide a stored value, a second storage device for providing a periodic alteration signal, means including said stored value for determining the content of said second storage device during certain time intervals and according to a certain function and means including the alteration signal of said second storage device for correcting the fuel apportionment signal.
Claim 3
Dependent Claim
27 words
Apparatus in accordance with claim 1 wherein the time interval for the signal change of said second storage device is held constant or depends on operating characteristics.
Claim 4
Dependent Claim
30 words
Apparatus in accordance with claim 2 wherein the time interval for the signal change of said second storage device is at least dependent on the rpm and/or on the load.
Claim 5
Dependent Claim
27 words
Apparatus in accordance with claim 1 wherein the function of the signal change of the second storage device is different depending on the direction of the change.
Claim 6
Dependent Claim
24 words
Apparatus in accordance with claim 4 wherein an exponential function is provided as the function of the signal change of said second storage device.
Claim 7
Dependent Claim
29 words
Apparatus in accordance with claim 5 wherein the charging of said first storage device is repeated after certain edges of the rpm transducer signal and follows an exponential function.
Claim 8
Dependent Claim
42 words
Apparatus in accordance with claim 6 including a pulse generator, a correction unit for the injection pulse and means for feeding the change signal of said second storage device to said pulse generator and/or to said correction unit for the injection pulse.
Claim 9
Dependent Claim
116 words
Apparatus for correcting a fuel apportionment signal in an internal combustion engine during a change in required fuel quantity including: a first electrical storage device; a first means for charging the first electrical storage device in accordance with engine rpm pulses; a second electrical storage device having a charge to provide an alteration signal; a second means for charging the second electrical storage device in accordance with engine rpm pulses; wherein the alteration signal is dependent on the charge of the first electrical storage device during predetermined time intervals and according to pre-determined functions; and further wherein the pulses of the first charging means are phase-shifted with respect to the pulses of the second charging means.
Claim 10
Dependent Claim
116 words
Apparatus for correcting a fuel apportionment signal in an internal combustion engine during a change in required fuel quantity including: a first electrical storage device; a first means for charging the first electrical storage device in accordance with engine rpm pulses; a second electrical storage device having a charge to provide an alteration signal; a second means for charging the second electrical storage device in accordance with engine rpm pulses; wherein the alteration signal is dependent on the charge of the first electrical storage device during predetermined time intervals and according to pre-determined functions; and further wherein the pulses of the first charging means are phase-shifted with respect to the pulses of the second charging means.
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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |