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US5522367A
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Method and device for predicting a future load signal in connection with the control of an internal-combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1994-12-14
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Granted: 1996-06-04
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Expires: 2014-12-14
Abstract
Abstract In a method and a device for predicting a future load signal (tLPr) in connection with the control of an internal-combustion engine, a crank-angle interval (wPr) is determined from the storage of fuel before use (wEE), from the fuel-injection period (wti), and from the calculation time (wB), expressed in units of time or crank-angle units. The future load signal (tLPr) is then determined from a current main-load signal (tL), a current auxiliary-load signal (tL'), which runs ahead of the current main-load signal (tL), and from the crank-angle interval (wPr). The determination is made using a first-order low-pass filter, whose filter constant (wF) is able to be specified in dependence upon load.
Inventors
- 👤 Lutz Reuschenbach
- 👤 Hans Veil
- 👤 Christian Koehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:46
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/32; F02D41/34; F02D41/02; F02D41/04; F02D41/045; F02D41/14; F02D41/1401; F02D41/18; F02D41/182; F02D2041/1433; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
A method for controlling an internal-combustion engine, comprising the steps of: predicting a future load signal (tLPr) as a function of: a current main-load signal (tL), a current auxiliary-load signal (tL'), which runs ahead of the current mainload signal (tL), and a crank-angle interval (wPr), the crank-angle interval being dependent upon a storage of fuel before use (WEE), upon a fuel-injection period (wti), and upon a calculation time (wB); and controlling a supply of fuel to the internal-combustion engine as a function of the predicted future load signal.
Claim 2
Independent Claim
88 words
A method for controlling an internal-combustion engine, comprising the steps of: predicting a future load signal (tLPr) as a function of: a current main-load signal (tL), a current auxiliary-load signal (tL'), which runs ahead of the current mainload signal (tL), and a crank-angle interval (wPr), the crank-angle interval being dependent upon a storage of fuel before use (WEE), upon a fuel-injection period (wti), and upon a calculation time (wB); and controlling a supply of fuel to the internal-combustion engine as a function of the predicted future load signal.
Claim 3
Dependent Claim
41 words
The method according to claim 1, wherein the future load signal (tLPr) is determined with a low-pass filter, the low-pass filter including a filter constant (wF), and further comprising the step of: specifying the filter constant (wF) in dependence upon load.
Claim 4
Dependent Claim
44 words
The method according to claim 2, further comprising the steps of: reading the filter constant (wF) from a first characteristic curve when there is an increasing load; and reading the filter constant (wF) from a second characteristic curve when there is a decreasing load.
Claim 5
Dependent Claim
29 words
The method according to claim 1, wherein the,current auxiliary-load (tL') is determined from an opening angle (∝) of a throttle valve, and a speed (n) of the internal-combustion engine.
Claim 6
Dependent Claim
46 words
The method according to claim 1, wherein the current auxiliary-load signal (tL') is determined from an opening angle (∝) of a throttle valve, a speed (n) of the internal-combustion engine, and an air quantity (qLL) flowing through at least one by-pass duct to the throttle valve.
Claim 7
Dependent Claim
46 words
The method according to claim 1, wherein the current main-load signal (tL) is determined using at least one of a measured intake-manifold pressure (p) and an engine speed (n), a mass-air flow (m) detected using a mass air-flow sensor, and a filtered current auxiliary-load signal (tL').
Claim 8
Dependent Claim
29 words
The method according to claim 1, further comprising the step of: correcting the current auxiliary-load signal (tL') depending upon a temperature (T) of induced air and a barometric level.
Claim 9
Dependent Claim
43 words
The method according to claim 7, further comprising the step of: adjusting the corrected auxiliary-load signal (tLK') to the current main-load signal (tL) using an adjustment value (dtL), when the current main-load signal (tL) is not determined from the current auxiliary-load signal (tL').
Claim 10
Dependent Claim
49 words
The method according to claim 8, wherein the adjustment value (dtL) is determined by integrating a deviation between the current main-load signal (tL) and a filtered auxiliary-load signal (tLF') provided with the adjustment value (dtL), the filtered auxiliary-load signal (tLF') being determined by filtering the corrected auxiliary-load signal (tLK').
Claim 11
Dependent Claim
37 words
The method according to claim 1, wherein the current auxiliary-load signal (tL') is determined from a mass air flow (m) detected by a mass air-flow sensor, when there are small opening angles (∝) of a throttle valve.
Claim 12
Dependent Claim
63 words
The-method according to claim 1, further comprising the steps of: determining for at least one later crank-angle (w), the future load signal (tLPr) and the amount of fuel to be injected; and one of prolonging the original injection period (ti), and transmitting an additional injection pulse, when a larger amount of fuel is determined for the at least one later crank angle (w).
Claim 13
Dependent Claim
71 words
The method according to claim 1, further comprising the steps of: dividing a determined amount of fuel to be injected between a first injection pulse and a second injection pulse; releasing the first injection pulse immediately; correcting the second injection pulse based upon a result of a further determination of the future load signal (tLPr) and of the amount of fuel to be injected; and releasing the corrected second injection pulse.
Claim 14
Independent Claim
106 words
An apparatus for controlling an internal-combustion engine comprising: a circuit arrangement having means for determining: a current main-load signal (tL), a current auxiliary-load signal (tL'), which runs ahead of the current main-load signal (tL), a crank-angle interval (wPr) based upon: a storage of fuel before use (wEE), a fuel-injection period (wti), and a calculation time (wB), and a predicted future load signal (tLPr) as a function of the current main-load signal (tL), the current auxiliary-load signal (tL'), and the crank-angle interval (wPr); the circuit arrangement including means for controlling a supply of fuel to the internal-combustion engine as a function of the predicted future load signal.
Claim 15
Independent Claim
106 words
An apparatus for controlling an internal-combustion engine comprising: a circuit arrangement having means for determining: a current main-load signal (tL), a current auxiliary-load signal (tL'), which runs ahead of the current main-load signal (tL), a crank-angle interval (wPr) based upon: a storage of fuel before use (wEE), a fuel-injection period (wti), and a calculation time (wB), and a predicted future load signal (tLPr) as a function of the current main-load signal (tL), the current auxiliary-load signal (tL'), and the crank-angle interval (wPr); the circuit arrangement including means for controlling a supply of fuel to the internal-combustion engine as a function of the predicted future load signal.
Claim 16
Dependent Claim
51 words
The apparatus according to claim 13, wherein the circuit arrangement includes: a first circuit for determining the current main-load signal (tL), a second circuit for determining the current auxiliary-load signal (tL'), a third circuit for determining the crank-angle interval (wPr), and a fourth circuit for determining the future load signal (tLPr).
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) | 1999-06-04 | 1999-12-04 | 2000-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-04 | 2003-12-04 | 2004-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-04 | 2007-12-04 | 2008-06-04 | $7700.00 | Window Closed / Lapsed |