US4426980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correction device for a fuel metering system in an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1983-03-28
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Granted: 1984-01-24
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Expires: 2003-03-28
Abstract
Abstract A device is proposed for drift compensation in fuel metering systems, in which it is not the metered quantity as such which is controlled in closed-loop fashion, but rather only the position of a quantity-determining member. The object of the invention is to maintain or re-obtain the original association between the fuel quantity and the position signal of the quantity-determining member for the purpose of providing a correct indication of the load state existing at a particular time. The drift compensation is intended to be capable of being performed manually, semi-automatically, or automatically, in an additive and/or multiplicative manner. It can furthermore be realized via a preferably rpm-dependent characteristic curve. The various values may be ascertained, for instance, in connection with running-out and running-up tests.
Inventors
- 👤 Hermann Eisele
- 👤 Gerhard Stumpp
- 👤 Wolf Wessel
- 👤 Ulrich Flaig
- 👤 Fridolin Piwonka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:19
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/28; F02D43/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A drift-compensation correction device for controlling a fuel metering system having a fuel pump in an internal combustion engine in which there is an incorrect relationship between a fuel metering signal and metered fuel quantity due to fuel pump aging, comprising: means for generating set-point data signals responsive to operating parameters of said engine, said data signals including a drift signal corresponding to said incorrect relationship, means responsive to a final control element in said fuel metering system for generating actual data signals, a comparator means for comparing said actual and set-point signals, a regulating means responsive to said comparator means for providing said fuel metering signal to said final control element via an output circuit means for determing said quantity of fuel to be metered to said pump, and means supplying a correction intervention signal to said fuel metering signal corresponding to said drift signal, whereby the effect of drift in said set-point generating means due to aging of said pump is compensated for and said set-point generating means is restored to its original output rating value.
Claim 2
Dependent Claim
178 words
A drift-compensation correction device for controlling a fuel metering system having a fuel pump in an internal combustion engine in which there is an incorrect relationship between a fuel metering signal and metered fuel quantity due to fuel pump aging, comprising: means for generating set-point data signals responsive to operating parameters of said engine, said data signals including a drift signal corresponding to said incorrect relationship, means responsive to a final control element in said fuel metering system for generating actual data signals, a comparator means for comparing said actual and set-point signals, a regulating means responsive to said comparator means for providing said fuel metering signal to said final control element via an output circuit means for determing said quantity of fuel to be metered to said pump, and means supplying a correction intervention signal to said fuel metering signal corresponding to said drift signal, whereby the effect of drift in said set-point generating means due to aging of said pump is compensated for and said set-point generating means is restored to its original output rating value.
Claim 3
Dependent Claim
16 words
A correction device as defined by claim 1, wherein said corrective intervention signal being effected semiautomatically.
Claim 4
Dependent Claim
15 words
A device according to claim 1, wherein said correction intervention signal means comprises a potentiometer.
Claim 5
Dependent Claim
19 words
A device according to claim 1, wherein said correction intervention signal means comprises a characteristic curve generator, preferably rpm-dependent.
Claim 6
Dependent Claim
18 words
A device according to claim 1, wherein said fuel metering signal is additively corrected by said comparator means.
Claim 7
Dependent Claim
23 words
A correction device according to claim 1, wherein said correction intervention signal is applied to said fuel metering signal at said comparator means.
Claim 8
Dependent Claim
24 words
A correction device according to claim 1, wherein said correction intervention signal is applied to said fuel metering signal at said set-point generating means.
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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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |