US4815433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and device for controlling and/or regulating the idling speed of an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1985-07-27
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Granted: 1989-03-28
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Expires: 2005-07-27
Abstract
Abstract A method and a device for controlling and/or regulating the idling speed of an internal combustion engine is suggested, wherein changes of the operating condition of the internal combustion engine are considered by means of a precontrol being dependent from operational characteristics dimensions of the internal combustion engine, as well as being stabilized during long term changes of the operational condition of the internal combustion engine with the assistance of a correction of the precontrol. Thereby, it is differentiated between a direct correction as well as an indirect correction, for example, additive correction of the precontrol. Block diagrams are provided for both correction possibilities. Also, a plurality of criteria are stated with the assistance of which the time range of the correction may be defined. For realizing the method with the assistance of a corresponding programmed electronic computer the precontrol and the correction for the precontrol are designed in form of support locations with intermediately disposed interpolations in one exemplified embodiment.
Inventors
- 👤 Ernst Wild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:17
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/16; F02D41/04; F02D41/08; F02D41/083; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
134 words
Method for controlling and regulating the idling speed of the internal combustion engine, comprising the steps of generating operating characteristics signals which characterize an operational condition of the internal combustion engine with sensors, providing an idling speed regulator (10) having an integral component, providing a precontrol (20) of the idling speed of the internal combustion engine depending from the temperature as one of the operational values of the internal combustion engine for generating precontrol signals (KV), providing precontrol correcting means and regulating the idling speed by said regulator in dependency from the precontrol of the idling speed, wherein the precontrol is corrected in dependency from the operational condition of the internal combustion engine by adding temperature-dependent correcting signals from a connecting point (14) between said precontrol and said correcting means to said precontrol signals.
Claim 2
Dependent Claim
134 words
Method for controlling and regulating the idling speed of the internal combustion engine, comprising the steps of generating operating characteristics signals which characterize an operational condition of the internal combustion engine with sensors, providing an idling speed regulator (10) having an integral component, providing a precontrol (20) of the idling speed of the internal combustion engine depending from the temperature as one of the operational values of the internal combustion engine for generating precontrol signals (KV), providing precontrol correcting means and regulating the idling speed by said regulator in dependency from the precontrol of the idling speed, wherein the precontrol is corrected in dependency from the operational condition of the internal combustion engine by adding temperature-dependent correcting signals from a connecting point (14) between said precontrol and said correcting means to said precontrol signals.
Claim 3
Dependent Claim
21 words
Method in accordance with claim 1, characterized in that the precontrol is directly controlled by changing the values of the precontrol.
Claim 4
Dependent Claim
22 words
Method in accordance with claim 1, wherein the precontrol is only corrected in the decoupled operational condition of the internal combustion engine.
Claim 5
Dependent Claim
59 words
Method in accordance with claim 3, wherein the internal combustion engine is exactly in its decoupled operational condition when the amount of the speed difference between a desired regulation speed and the actual speed is below a defined, predeterminable speed differential threshold and when the output signal of the idling speed regulator is also below a defined, predeterminable threshold.
Claim 6
Dependent Claim
34 words
Method in accordance with claim 3, wherein the internal combustion engine is exactly in its decoupled operational stage when a drive speed drop of the internal combustion engine falls below a defined, predeterminable value.
Claim 7
Dependent Claim
29 words
Method in accordance with claim 5, wherein in an internal combustion engine with an automatic-drive-switch the precontrol is corrected only when the automatic-drive-switch is not in a drive position.
Claim 8
Dependent Claim
34 words
Method in accordance with claim 1, wherein the precontrol is corrected only when the drive speed of a motor vehicle being driven by the internal combustion engine falls below a defined, predetermined drive speed.
Claim 9
Dependent Claim
20 words
Method in accordance with claim 1, wherein the precontrol is only corrected when the internal combustion engine is in maintenance.
Claim 10
Dependent Claim
20 words
Method in accordance with claim 1, wherein the precontrol is divided into a plurality of ranges by means of equations.
Claim 11
Dependent Claim
12 words
Method in accordance with claim 9, wherein the total precontrol is corrected.
Claim 12
Dependent Claim
22 words
Method in accordance with claim 1, wherein the precontrol is stated by means of individual support locations and intermediately disposed corresponding interpolations.
Claim 13
Dependent Claim
13 words
Method in accordance with claim 11, wherein only the support locations are corrected.
Claim 14
Dependent Claim
20 words
Method in accordance with claim 1, wherein the precontrol depends not only from one, but from a plurality of variables.
Claim 15
Dependent Claim
104 words
Device for controlling and regulating the idling speed of an internal combustion engine, comprising sensors for generating operating characteristics signals which characterize an operational condition of the internal combustion engine, computer means providing idling speed control and a precontrol of the idling speed control of the internal combustion engine depending from the temperature as one of the operational values of the internal combustion engine, means for regulating the idling speed in dependency from the precontrol of the idling speed, and means for correcting the precontrol in dependence from the operational condition of the internal combustion engine by adding temperature-dependent correcting signals to precontrol signals.
Claim 16
Dependent Claim
104 words
Device for controlling and regulating the idling speed of an internal combustion engine, comprising sensors for generating operating characteristics signals which characterize an operational condition of the internal combustion engine, computer means providing idling speed control and a precontrol of the idling speed control of the internal combustion engine depending from the temperature as one of the operational values of the internal combustion engine, means for regulating the idling speed in dependency from the precontrol of the idling speed, and means for correcting the precontrol in dependence from the operational condition of the internal combustion engine by adding temperature-dependent correcting signals to precontrol signals.
Claim 17
Dependent Claim
16 words
Device in accordance with claim 14, wherein the precontrol correcting means include at least one intergrator.
Claim 18
Dependent Claim
19 words
Device in accordance with claim 14, wherein at least one multiplicator is used in said means for correcting precontrol.
Claim 19
Dependent Claim
22 words
Device in accordance with claim 14, wherein the total precontrol is influenced with the assistance of the means for correcting the precontrol.
Claim 20
Dependent Claim
20 words
Device in accordance with claim 14, wherein the means for correcting the precontrol influence only support values of the precontrol.
Claim 21
Dependent Claim
13 words
Device in accordance with claim 18, wherein only neighboring support values are influenced.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |