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US5383086A
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System and method for triggering an inductive consumer
Assignee: Robert Bosch GmbH
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Filing: 1992-12-02
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Granted: 1995-01-17
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Expires: 2012-12-02
Abstract
Abstract In a system for triggering an inductive consumer, particularly a consumer for controlling an internal combustion engine, the consumer is coupled via a circuit element to a voltage source. A control means triggers the circuit element in the switching mode for a preselected ON duration. Furthermore, means are provided for measuring the current flowing through the inductive consumer. To measure an actual current value, a first current value is measured shortly after the closing operation, and a second current value is measured immediately before the opening operation.
Inventors
- 👤 Juergen Wietelmann
- 👤 Thomas Rueping
- 👤 Norbert Mueller
- 👤 Wolfgang Duehlmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:45
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/20; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06; F02D2041/202; F02D2041/2031; F02D2041/2058
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
113 words
A system for triggering an inductive consumer and for determining an effective current flowing through the inductive consumer, comprising: a switching circuit element, the switching circuit element coupling the inductive consumer to a voltage source; means for selectively triggering the switching circuit element to switch the switching circuit element between a closing operation and an opening operation; means for determining a first current flow through the inductive consumer a predetermined time period after the closing operation, for determining a second current flow through the inductive consumer a predetermined time period before the opening operation, and for determining an effective current flow through the inductive consumer based upon the first and second current flows.
Claim 2
Independent Claim
113 words
A system for triggering an inductive consumer and for determining an effective current flowing through the inductive consumer, comprising: a switching circuit element, the switching circuit element coupling the inductive consumer to a voltage source; means for selectively triggering the switching circuit element to switch the switching circuit element between a closing operation and an opening operation; means for determining a first current flow through the inductive consumer a predetermined time period after the closing operation, for determining a second current flow through the inductive consumer a predetermined time period before the opening operation, and for determining an effective current flow through the inductive consumer based upon the first and second current flows.
Claim 3
Dependent Claim
30 words
The system according to claim 1, wherein the means for determining the actual current flow includes means for determining an average current flow of the first and second current flows.
Claim 4
Dependent Claim
43 words
The system according to claim 2, wherein the means for determining the actual current flow further includes means for correcting the determined average current flow based upon at least one of a preselected 0N duration, a supply voltage level, and a coolant temperature.
Claim 5
Dependent Claim
24 words
The system according to claim 3, wherein the correcting means further includes means for multiplying the determined average current flow by a correction factor.
Claim 6
Dependent Claim
21 words
The system according to claim 1, further comprising means for comparing the determined actual current flow to a preselected threshold value.
Claim 7
Dependent Claim
30 words
The system according to claim 5, wherein the switching circuit element is triggered as a function of the comparison between the determined actual current flow and the preselected threshold value.
Claim 8
Dependent Claim
20 words
The system according to claim 1, wherein the first current flow is determined approximately 80 microseconds after the closing operation.
Claim 9
Independent Claim
100 words
A method of triggering an inductive consumer and for determining an effective current flowing through the inductive consumer, comprising the steps of: selectively triggering a switching circuit element coupled to the inductive consumer to switch the switching circuit element between a closing operation and an opening operation; determining a first current flow through the inductive consumer a predetermined time period after the closing operation; determining a second current flow through the inductive consumer a predetermined time period before the opening operation; and determining an effective current flow through the inductive consumer based upon the determined first and second current flows.
Claim 10
Independent Claim
100 words
A method of triggering an inductive consumer and for determining an effective current flowing through the inductive consumer, comprising the steps of: selectively triggering a switching circuit element coupled to the inductive consumer to switch the switching circuit element between a closing operation and an opening operation; determining a first current flow through the inductive consumer a predetermined time period after the closing operation; determining a second current flow through the inductive consumer a predetermined time period before the opening operation; and determining an effective current flow through the inductive consumer based upon the determined first and second current flows.
Claim 11
Dependent Claim
31 words
The method according to claim 8, wherein the step of determining the actual current flow includes the step of determining an average current flow of the first and second current flows.
Claim 12
Dependent Claim
44 words
The method according to claim 9, wherein the step of determining the actual current flow further includes the step of correcting the determined average current flow based upon at least one of a preselected 0N duration, a supply voltage level, and a coolant temperature.
Claim 13
Dependent Claim
24 words
The method according to claim 10, wherein the correcting step includes the step of multiplying the determined average current flow by a correction factor.
Claim 14
Dependent Claim
22 words
The method according to claim 8, further comprising the step of comparing the determined actual current flow to a preselected threshold value.
Claim 15
Dependent Claim
33 words
The method according to claim 12, wherein the triggering of the switching circuit element is performed as a function of the comparison between the determined actual current flow and the preselected threshold value.
Claim 16
Dependent Claim
20 words
The method according to claim 8, wherein the first current flow is determined approximately 80 microseconds after the closing operation.
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) | 1998-01-16 | 1998-07-18 | 1999-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-16 | 2002-07-18 | 2003-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-16 | 2006-07-18 | 2007-01-17 | $7700.00 | Window Closed / Lapsed |