US4993389A
Expired / Lapsed
US
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Electronic control device for controlling the fuel quantity of an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1987-08-12
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Granted: 1991-02-19
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Expires: 2007-08-12
Abstract
Abstract A device for the electronically controlled influencing of actuating devices of an internal combustion engine is proposed in which actuating devices can be influenced by comparing differentiated sensor signals with predeterminable threshold values. The actuating devices are directly accessed without a detour via any regulating devices. The system corresponding to the method thus becomes very simple and inexpensive in its construction. Control-loop-related oscillations are avoided by the direct influencing of the actuating device.
Inventors
- 👤 Frank Ahlborn
- 👤 Wolfgang Duhlmeyer
- 👤 Volker Schafer
- 👤 Albrecht Sieber
- 👤 Rainer Buck
- 👤 Herbert Kaberer
- 👤 Alf Loffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:25
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/04; F02D41/10; F02D41/107; F02D41/1497; F02D41/1498; F02D2200/00; F02D2200/02; F02D2200/10; F02D2200/1012; F02D2200/1015; F02D2250/00; F02D2250/28
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
134 words
Electronic control device for modulating the fuel quantity of an internal combustion engine, the device having an electrically driveable actuating device which is driven in dependence upon operating conditions of the internal combustion engine, and the device furthermore having sensors for a speed signal which is differentiated at least once during its further processing with the fuel quantity being modulated in dependence upon the differentiated speed signal in such a manner that bucking vibrations are counteracted, characterized in that the fuel quantity metered to the internal combustion engine is reduced when the first derivative of the speed signal exceeds a first threshold (S1); and, in that the reduction is ended when the first derivative of the speed signal drops below a second threshold (S2) with the second threshold being greater than the first threshold.
Claim 2
Dependent Claim
134 words
Electronic control device for modulating the fuel quantity of an internal combustion engine, the device having an electrically driveable actuating device which is driven in dependence upon operating conditions of the internal combustion engine, and the device furthermore having sensors for a speed signal which is differentiated at least once during its further processing with the fuel quantity being modulated in dependence upon the differentiated speed signal in such a manner that bucking vibrations are counteracted, characterized in that the fuel quantity metered to the internal combustion engine is reduced when the first derivative of the speed signal exceeds a first threshold (S1); and, in that the reduction is ended when the first derivative of the speed signal drops below a second threshold (S2) with the second threshold being greater than the first threshold.
Claim 3
Dependent Claim
39 words
Electronic control device of claim 1, characterized in that, for the case wherein the second threshold (S2) is not reached, the reduction of the fuel quantity is ended when there again is a drop below the first threshold (S1).
Claim 4
Dependent Claim
59 words
Electronic control device of claim 1, said speed signal being differentiated at least a second time to form a second derivative thereof, and characterized in that the fuel quantity to be metered to the internal combustion engine is only then modulated when the absolute value of the second derivative of the speed signal is greater than a threshold (S5).
Claim 5
Dependent Claim
44 words
Electronic control device according to claim 1, comprising an arrangement for recognizing sign changes in sensor signals, characterized in that the fuel quantity to be metered to the internal combustion engine is modulated when the first derivative of the speed signal changes its sign.
Claim 6
Dependent Claim
22 words
Electronic control device according to claim 1, wherein the thresholds for the differentiated speed signal are controlled in dependence upon operating parameters.
Claim 7
Dependent Claim
29 words
Electronic control device according to claim 5, wherein the speed or the first derivative of the speed or the second derivative of the speed are used as operating parameters.
Claim 8
Dependent Claim
21 words
Electronic control device according to claim 1, wherein the speed signal is derived from the signal of an air mass sensor.
Claim 9
Dependent Claim
19 words
Electronic control device according to claim 1, wherein the fuel quantity is modulated only within a predeterminable speed range.
Claim 10
Dependent Claim
21 words
Electronic control device according to claim 1, wherein the speed signals are divided with a variable dividing ratio before the evaluation.
Claim 11
Dependent Claim
136 words
Electronic control device for modulating the fuel quantity of an internal combustion engine, the device having an electrically driveable actuating device which is driven in dependence upon operating conditions of the internal combustion engine, and the device furthermore having sensors for a speed signal which is differentiated at least once during its further processing with the fuel quantity being modulated independence upon the differentiated speed signal in such a manner that bucking vibrations are counteracted, characterized in that the fuel quantity metered to the internal combustion engine is increased when the first derivative of the speed signal drops below a first threshold (S3); and, in that the increase of the fuel quantity is ended when the first derivative of speed signal exceeds a second threshold (S4) with the second threshold being less than the first threshold.
Claim 12
Dependent Claim
136 words
Electronic control device for modulating the fuel quantity of an internal combustion engine, the device having an electrically driveable actuating device which is driven in dependence upon operating conditions of the internal combustion engine, and the device furthermore having sensors for a speed signal which is differentiated at least once during its further processing with the fuel quantity being modulated independence upon the differentiated speed signal in such a manner that bucking vibrations are counteracted, characterized in that the fuel quantity metered to the internal combustion engine is increased when the first derivative of the speed signal drops below a first threshold (S3); and, in that the increase of the fuel quantity is ended when the first derivative of speed signal exceeds a second threshold (S4) with the second threshold being less than the first threshold.
Claim 13
Dependent Claim
39 words
Electronic control device of claim 10, characterized in that for the case wherein the second threshold (S4) is not reached, the increasing of the fuel quantity is then ended when there again is a drop below the firs threshold.
Claim 14
Dependent Claim
20 words
Electronic control device of claim 10, wherein the speed signal is derived from the signal of an air mass sensor.
Claim 15
Dependent Claim
18 words
Electronic control device of claim 10, wherein the fuel quantity is modulated only within a predeterminable speed range.
Claim 16
Dependent Claim
20 words
Electronic control device of claim 10, wherein the speed signals are divided with a variable dividing ratio before the evaluation.
Claim 17
Dependent Claim
14 words
Electronic control device of claim 11, wherein the speed signals are filtered before differentiation.
Claim 18
Dependent Claim
15 words
Electronic control device of claim 15, wherein a first-order Chebyshev filter is used for filtering.
References Cited (Backward Citations)
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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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |