Patent US4178891A successfully refreshed from Google Patents.
US4178891A
Expired / Lapsed
US
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Method and apparatus for controlling the operation of an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1976-03-11
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Granted: 1979-12-18
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Expires: 1996-03-11
Abstract
Abstract A method for controlling the operation of an internal combustion engine based on dynamic engine stability (roughness) compares actual running data with an rpm-dependent but smooth reference signal to obtain a measure of the torque fluctuations of the engine. This measure is fed to a final control element which adjusts the ignition timing angle of the engine alone or in addition to the adjustment of other engine parameters, such as the fuel-air ratio and/or the exhaust gas recycle rate.
Inventors
- 👤 Reinhard Latsch
- 👤 Valerio Bianchi
- 👤 Reiner Burkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:20
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1497; F02D41/1498; F02D41/18; F02D41/182; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/152; F02P5/155; F02D2200/00; F02D2200/02; F02D2200/10; F02D2200/1015; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
A method for controlling the operation of an internal combustion engine, comprising the steps of: (A) determining a measurement-time interval, the duration of which corresponds to an angular region of the crankshaft rotation related to at least one stroke of a piston of the engine; (B) generating a measurement value from an engine operating parameter during the measurement-time interval, said generated measurement value varying during the measurement-time interval as a measure of the fluctuations of the angular speed of the crankshaft over said angular region, and corresponding to the average combustion chamber pressure; (C) integrating the measurement value generated; (D) comparing an integrated measurement value generated during a subsequent measurement-time interval and generating a differential value as an actual value of the combustion chamber's average pressure; (E) generating a nominal value of the combustion chamber average pressure; and (F) adjusting the ignition timing angle of the engine in accordance with the difference between the nominal and actual values.
Claim 2
Independent Claim
158 words
A method for controlling the operation of an internal combustion engine, comprising the steps of: (A) determining a measurement-time interval, the duration of which corresponds to an angular region of the crankshaft rotation related to at least one stroke of a piston of the engine; (B) generating a measurement value from an engine operating parameter during the measurement-time interval, said generated measurement value varying during the measurement-time interval as a measure of the fluctuations of the angular speed of the crankshaft over said angular region, and corresponding to the average combustion chamber pressure; (C) integrating the measurement value generated; (D) comparing an integrated measurement value generated during a subsequent measurement-time interval and generating a differential value as an actual value of the combustion chamber's average pressure; (E) generating a nominal value of the combustion chamber average pressure; and (F) adjusting the ignition timing angle of the engine in accordance with the difference between the nominal and actual values.
Claim 3
Independent Claim
160 words
A method for controlling the operation of an internal combustion engine, comprising the steps of: (A) determining a measurement-time interval, the duration of which corresponds to an angular region of the crankshaft rotation related to at least one stroke of a piston of the engine; (B) generating a measurement value from an engine operating parameter during the measurement-time interval, said generated measurement value varying during the measurement-time interval as a measure of the fluctuations in the time taken by the crankshaft to rotate through said angular region and corresponding to the average combustion chamber pressure; (C) integrating the measurement value generated; (D) comparing an integrated measurement value generated during a subsequent measurement-time interval and generating a differential value as an actual value of the combustion chamber's average pressure; (E) generating a nominal value of the combustion chamber average pressure; and (F) adjusting the ignition timing angle of the engine in accordance with the difference between the nominal and actual values.
Claim 4
Independent Claim
160 words
A method for controlling the operation of an internal combustion engine, comprising the steps of: (A) determining a measurement-time interval, the duration of which corresponds to an angular region of the crankshaft rotation related to at least one stroke of a piston of the engine; (B) generating a measurement value from an engine operating parameter during the measurement-time interval, said generated measurement value varying during the measurement-time interval as a measure of the fluctuations in the time taken by the crankshaft to rotate through said angular region and corresponding to the average combustion chamber pressure; (C) integrating the measurement value generated; (D) comparing an integrated measurement value generated during a subsequent measurement-time interval and generating a differential value as an actual value of the combustion chamber's average pressure; (E) generating a nominal value of the combustion chamber average pressure; and (F) adjusting the ignition timing angle of the engine in accordance with the difference between the nominal and actual values.
Claim 5
Independent Claim
150 words
An apparatus for controlling the operation of an internal combustion engine, which includes a crankshaft and distributor means, comprising: (A) sensor means associated with the crankshaft, for sensing crankshaft rotation during a predetermined measurement-time interval and forming an electrical signal related to the crankshaft rotation, said measurement-time interval corresponding to an angular region of the crankshaft rotation related to at least one stroke of a piston of the engine; (B) actual value signal generator means including integration means, connected to said sensor means, for integrating sequential ones of the electrical signals generated by the sensor means generating during the predetermined measurement-time interval an electrical actual value signal related to the speed of rotation of the crankshaft, which signal is representative of the fluctuation in the average combustion chamber pressure in two sequential time intervals; (C) nominal value signal generator means, for generating an electrical nominal value signal from engine parameters;
Claim 6
Independent Claim
150 words
An apparatus for controlling the operation of an internal combustion engine, which includes a crankshaft and distributor means, comprising: (A) sensor means associated with the crankshaft, for sensing crankshaft rotation during a predetermined measurement-time interval and forming an electrical signal related to the crankshaft rotation, said measurement-time interval corresponding to an angular region of the crankshaft rotation related to at least one stroke of a piston of the engine; (B) actual value signal generator means including integration means, connected to said sensor means, for integrating sequential ones of the electrical signals generated by the sensor means generating during the predetermined measurement-time interval an electrical actual value signal related to the speed of rotation of the crankshaft, which signal is representative of the fluctuation in the average combustion chamber pressure in two sequential time intervals; (C) nominal value signal generator means, for generating an electrical nominal value signal from engine parameters;
Claim 7
Dependent Claim
57 words
(D) comparator means, for electrically comparing said actual value signal with said nominal value signal and for forming an electrical output signal; and (E) servo means, connected to the output of said comparator means and to said distributor means, for adjusting the ignition timing angle of the internal combustion engine in response to the electrical output signal.
Claim 8
Dependent Claim
57 words
(D) comparator means, for electrically comparing said actual value signal with said nominal value signal and for forming an electrical output signal; and (E) servo means, connected to the output of said comparator means and to said distributor means, for adjusting the ignition timing angle of the internal combustion engine in response to the electrical output signal.
References Cited (Backward Citations)
US2655036A
Cited
US3142967A
Cited
US3596643A
Cited
US3872846A
Cited
US3789816A
Cited
US3977373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |