US5315976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Error-corrected closed-loop control system
Assignee: Robert Bosch GmbH
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Filing: 1991-09-16
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Granted: 1994-05-31
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Expires: 2011-09-16
Abstract
Abstract A method for operating an closed-loop control system for injecting fuel into an internal combustion engine, with the control system having an error correcting capability for deviations that occur in the control signal being processed by the control system, and with the control system having a controlling element, which is embodied as a precontrol, PI-controller that are operated in parallel, and a non-volatile memory for storing deviation signals.
Inventors
- 👤 Manfred Birk
- 👤 Reinhard Fenchel
- 👤 Norbert Muller
- 👤 Wolf Wessel
- 👤 Hans-Christian Engelbrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/36; G05B11/42; F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/30; F02D41/38; F02B; F02B3/00; F02B3/06; F02D2250/00; F02D2250/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
163 words
A method for operating an closed-loop control system for injecting fuel into an internal combustion engine, with the control system being capable of correcting errors caused by deviations that occur due to operating tolerances of injection system components,. and with a controlling element (7), operating as a precontrol (8), and a controller (2) being operated in parallel in the control system, the method comprising: determining a first deviation signal value (A) substantially in a middle of a regulating range for fuel injection control; determining a second deviation signal value (M) substantially near one of the end points of the regulating range for fuel injection control; storing the first and second deviation signals (A, M) in a non-volatile memory; and feeding the first and second deviation signals to the control system as correction signals for a fuel injection signal being processed by the control system, with the corrections to the fuel injection signal being contemporaneous with a particular operations point of the controller (2).
Claim 2
Independent Claim
163 words
A method for operating an closed-loop control system for injecting fuel into an internal combustion engine, with the control system being capable of correcting errors caused by deviations that occur due to operating tolerances of injection system components,. and with a controlling element (7), operating as a precontrol (8), and a controller (2) being operated in parallel in the control system, the method comprising: determining a first deviation signal value (A) substantially in a middle of a regulating range for fuel injection control; determining a second deviation signal value (M) substantially near one of the end points of the regulating range for fuel injection control; storing the first and second deviation signals (A, M) in a non-volatile memory; and feeding the first and second deviation signals to the control system as correction signals for a fuel injection signal being processed by the control system, with the corrections to the fuel injection signal being contemporaneous with a particular operations point of the controller (2).
Claim 3
Dependent Claim
14 words
The method according to claim 1, wherein the controller (2) is a PI-controller (4).
Claim 4
Dependent Claim
30 words
The method according to claim 1 or 2, wherein the first deviation signal value (A) represents a cumulative error and the second deviation signal value (M) represents a multiplicative error.
Claim 5
Dependent Claim
43 words
The method according to claim 3, wherein the feeding step further comprises cumulatively feeding to the closed-loop control system (1) the first deviation signal value associated with the cumulative error, and multiplicatively feeding the second deviation signal value associated with the multiplicative error.
Claim 6
Dependent Claim
32 words
The method according to claim 2, wherein the method further includes transmitting the first deviation signal value (A) to a first summing point (10) at an output (9) of the precontrol (8).
Claim 7
Dependent Claim
36 words
The method according to claim 2, wherein the method further includes transmitting the second deviation signal value (M) to a multiplication point (15) at an input of a controlled system (3) of the closed-loop control system.
Claim 8
Dependent Claim
59 words
The method according to claim 2, wherein the method further includes determining by interpolation intermediate deviation signal values for the first and second deviation signals that lay between the end points of a control loop for a particular controller operations point existing at a given time, with the intermediate deviation signal values being fed the closed-loop control system (1).
Claim 9
Dependent Claim
21 words
The method according to claim 2, wherein gain of the precontrol (8) corresponds to a reverse average of controlled system gain.
Claim 10
Dependent Claim
67 words
The method according to claim 2, wherein the method further includes inputting a signal output from a second summing point (6) to the PI-controller (4), with a setpoint signal (SB soll ) with a positive sign, and an actual signal (SB ist ) with a negative sign coming from an output (18) of a controlled system (3), being fed as inputs to the second summing point (6).
Claim 11
Dependent Claim
46 words
The method according to claim 9, wherein the setpoint signal (SB soll ) pertains to a start-of-injection setpoint signal, and the actual signal (SB ist ) pertains to a start-of-injection actual signal for injecting fuel into an internal combustion engine, preferably a self-igniting internal combustion engine.
Claim 12
Dependent Claim
22 words
The method according to claim 2, wherein the method further includes inputting a setpoint signal (SB soll ) to the precontrol (8).
Claim 13
Independent Claim
39 words
The method according to claims 2, 9, or 11, wherein the method further includes feeding with a positive sign an output (9) of the precontrol (8) and an output of the PI-controller (4) to a third summing point (13).
Claim 14
Dependent Claim
20 words
The method according to claim 6, wherein a controlled system (3) includes an injection pump of an internal combustion engine.
Claim 15
Independent Claim
31 words
The method according to claims 9, 10, and 11, wherein a setpoint signal (SB soll ) represents a characteristics field value formed from predetermined operating parameters of the internal combustion engine.
Claim 16
Dependent Claim
14 words
The method according to claim 7, wherein the interpolating step further includes linear interpolating.
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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) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |