US4487189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism for fuel metering of a combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1983-03-22
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Granted: 1984-12-11
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Expires: 2003-03-22
Abstract
Abstract A control mechanism for a fuel metering system in a combustion engine is proposed which makes possible a start control defined as load-independent or as nearly load-independent. It is the purpose of the control mechanism to avoid possible false interpretations of the load signal during extremely low rpm. The control mechanism comprises a function generator which, dependent on operational characteristics, determines or co-determines the signal at the load input of a signal processing stage of the fuel metering apparatus during start-up.
Inventors
- 👤 Michael Horbelt
- 👤 Herbert Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:55
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06; F02D41/062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
A control system for a fuel metering system of an internal combustion engine having a pulse generator to which load and rpm signals are supplied from an rpm sensor and a load sensor for forming an injection signal, a function generator for simulating a load signal, and a switching means responsive to a start-up operation for coupling said function generator to the load signal input of said pulse generator, whereby said simulated load signal from said function generator can be coupled to said signal from said load sensor.
Claim 2
Dependent Claim
88 words
A control system for a fuel metering system of an internal combustion engine having a pulse generator to which load and rpm signals are supplied from an rpm sensor and a load sensor for forming an injection signal, a function generator for simulating a load signal, and a switching means responsive to a start-up operation for coupling said function generator to the load signal input of said pulse generator, whereby said simulated load signal from said function generator can be coupled to said signal from said load sensor.
Claim 3
Dependent Claim
34 words
A control system as defined in claim 1, wherein the function generator determines the signal at the load input of said pulse generator during a starting operation until a predetermined rpm has been reached.
Claim 4
Dependent Claim
21 words
A control system as defined in claim 2, wherein said function generator emits a constant initial signal during the starting operation.
Claim 5
Dependent Claim
26 words
A control system as defined in claim 3, wherein the initial signal of said function generator has a low potential, at least during the starting operation.
Claim 6
Dependent Claim
42 words
A control system as defined in claim 1, wherein said switching means includes a signal coupling point, and the signal at said signal coupling point is dependent on the load signal as well as on the initial signal of said function generator.
Claim 7
Dependent Claim
23 words
A control system as defined in claim 2, wherein the initial signal of said function generator is at a minimum dependent on rpm.
Claim 8
Dependent Claim
23 words
A control system as defined in claim 2, wherein the initial signal of said function generator is at a minimum dependent on temperature.
Claim 9
Dependent Claim
23 words
A control system as defined in claim 2, wherein the initial signal of said function generator is at a minimum dependent on time.
References Cited (Backward Citations)
US4148282A
Cited
US3971354A
Cited
US4134368A
Cited
US4227491A
Cited
US4327691A
Cited
US4208991A
Cited
US4246639A
Cited
US4335687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |