US4969439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adaptive control system for an internal combustion engine
Assignee: ZF International UK Ltd
•
Filing: 1988-09-12
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Granted: 1990-11-13
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Expires: 2008-09-12
Abstract
Abstract Disclosed is a method and apparatus for controlling operation of an engine whereby there is a known general function relating an engine control input to the engine output. This known control function has a number of structures or method steps which accomplish the following functions. The value of at least one engine output is measured; a base value of at least one engine input is supplied. A value of the engine output is determined based upon a predetermined function of the base value of the supplied engine control input; the measured value of the engine output is compared with the determined value of the engine output; in response to the comparison, base values of the two parameters in the predetermined function are adjusted; and the base value of the engine control input is adjusted based upon the adjustment to the two parameters.
Inventors
- 👤 Peter G. Scotson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:01
CPC Classifications
F; F02; F02D; F02D41/00; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/1502; F02P5/151; F02D41/24; F02D41/2406; F02D41/2425; F02D41/2429; F02D41/2451; F02D41/2454; F02D41/2458; F02P3/00; F02P3/02; F02P3/04; F02P3/045; F02P3/0453; F02P3/0456; F02P5/1455; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
211 words
An adaptive control system for an internal combustion engine having at least one engine control input and at least one engine output, said control system comprising; measuring means for measuring a value of said at least one engine output; supplying means for supplying a value of said at least one engine control input to said input; first determining means, responsive to said supplying means, for determining a value of said at least one engine output as a predetermined function of said value of said at least one engine control input supplied by said supplying means, said predetermined function having at least two parameters, each of said two parameters having a base value; comparing means, responsive to said measuring means and said first determining means, for comparing the measured value of said at least one engine output from said measuring means with the determined value of said at least one engine output from said determining means and for providing an output; adjusting means, responsive to said comparing means output, for adjusting said base values of each of said at least two parameters; and second determining means, responsive to said adjusting means, for adjusting said at least one value of said engine control input in order to provide a desired comparing means output.
Claim 2
Dependent Claim
211 words
An adaptive control system for an internal combustion engine having at least one engine control input and at least one engine output, said control system comprising; measuring means for measuring a value of said at least one engine output; supplying means for supplying a value of said at least one engine control input to said input; first determining means, responsive to said supplying means, for determining a value of said at least one engine output as a predetermined function of said value of said at least one engine control input supplied by said supplying means, said predetermined function having at least two parameters, each of said two parameters having a base value; comparing means, responsive to said measuring means and said first determining means, for comparing the measured value of said at least one engine output from said measuring means with the determined value of said at least one engine output from said determining means and for providing an output; adjusting means, responsive to said comparing means output, for adjusting said base values of each of said at least two parameters; and second determining means, responsive to said adjusting means, for adjusting said at least one value of said engine control input in order to provide a desired comparing means output.
Claim 3
Dependent Claim
58 words
A system as claimed in claim 1, in which said second determining means comprises: means, responsive to said adjusting means, for determining a correction value; and means for adding said correction value to said value of said at least one engine control input so as to form a corrected value of said at least one engine control input.
Claim 4
Dependent Claim
46 words
A system as claimed in claim 1, further comprising perturbation generating means for superimposing a perturbation on the value of said at least one engine control input supplied by said supplying means, said measuring means measuring a change in the engine output resulting from the perturbation.
Claim 5
Dependent Claim
67 words
A system as claimed in claim 3, in which said first determining means comprises a means for determining a value of said at least one engine output as a derivative with respect to said at least one engine control input of a quadratic function of a change of said at least one value of the engine control input, and said at least two parameters comprise two parameters.
Claim 6
Dependent Claim
23 words
A system as claimed in claim 4, in which said two parameters represent curvature and location of a maximum of the quadratic function.
Claim 7
Dependent Claim
102 words
A system as claimed in claim 5, in which said measuring means includes means for calculating successive sets of difference values, each set of difference values comprising (a) a value indicative of a difference between a present value and a preceding value of said at least one engine control input, (b) a value indicative of a difference between the square of the present value and the square of the preceding value of said at least one engine control input, and (c) a value indicative of a difference between a present value and a preceding value of said at least one engine output.
Claim 8
Dependent Claim
84 words
A system as claimed in claim 6, in which said adjusting means includes: (a) means for storing values of the two parameters as a function of engine operating conditions, (b) means for calculating adjusted values of said two parameters based upon stored values of the two parameters for prevailing engine conditions and from a prevailing set of difference values, and (c) means for replacing said stored values of said two parameters at the prevailing engine conditions with said adjusted values of the two parameters.
Claim 9
Dependent Claim
28 words
A system as claimed in claim 7, in which said adjusting means includes means for constraining the adjusted values of said two parameters calculated by said calculating means.
Claim 10
Dependent Claim
22 words
A system as claimed in claim 1, in which said at least one engine control input is an ignition timing control input.
Claim 11
Dependent Claim
27 words
A system as claimed in claim 1, in which said second determining means further comprises means for determining a corrected value of a further engine control input.
Claim 12
Dependent Claim
45 words
A system as claimed in claim 10, in which said at least one engine control input comprises two engine control inputs, one of said engine control inputs is an ignition timing control input and another of said engine control inputs is a fueling control input.
Claim 13
Dependent Claim
228 words
An adaptive control system for an internal combustion engine having at least two engine control inputs and at least one engine output, said control system comprising; measuring means for measuring a value of said at least one engine output; supplying means for supplying a value of a first engine control input to one of said inputs; first determining means, responsive to said supplying means, for determining a value of said at least one engine output as a predetermined function of said value of said first engine control input supplied by said supplying means, said predetermined function having at least two parameters each of said two parameters having a base value; comparing means, responsive to said measuring means and said first determining means, for comparing the measured value of said at least one engine output from said measuring means with the determined value of said at least one engine output from said determining means and for providing an output; adjusting means, (a) responsive to said comparing means output, for adjusting said base values of each of said at least two parameters, and (b) responsive to said adjusting of said base values, for adjusting said value of said first engine control input; and second determining means, responsive to said adjusting means, for adjusting a value of said second engine control input in order to provide a desired comparing means output.
Claim 14
Dependent Claim
228 words
An adaptive control system for an internal combustion engine having at least two engine control inputs and at least one engine output, said control system comprising; measuring means for measuring a value of said at least one engine output; supplying means for supplying a value of a first engine control input to one of said inputs; first determining means, responsive to said supplying means, for determining a value of said at least one engine output as a predetermined function of said value of said first engine control input supplied by said supplying means, said predetermined function having at least two parameters each of said two parameters having a base value; comparing means, responsive to said measuring means and said first determining means, for comparing the measured value of said at least one engine output from said measuring means with the determined value of said at least one engine output from said determining means and for providing an output; adjusting means, (a) responsive to said comparing means output, for adjusting said base values of each of said at least two parameters, and (b) responsive to said adjusting of said base values, for adjusting said value of said first engine control input; and second determining means, responsive to said adjusting means, for adjusting a value of said second engine control input in order to provide a desired comparing means output.
Claim 15
Dependent Claim
31 words
A system as claimed in claim 12, in which said first engine control input is an ignition timing control input and the second engine control input is a fueling control input.
Claim 16
Dependent Claim
167 words
An adaptive control method for an internal combustion engine having at least one engine control input and at least one engine output, said method comprising; measuring a value of said at least one engine output; supplying a value of said at least one engine control input to said input; determining a value of said at least one engine output as a predetermined function of said value of said at least one engine control input, said predetermined function having at least two parameters, each of said two parameters having a base value; comparing the measured value of said at least one engine output with the determined value of said at least one engine output and providing a comparison output; adjusting said base values of each of said at least two parameters based upon said comparison output; and adjusting, in response to said adjusted base values of each of said two parameters, said at least one value of said engine control input in order toprovide a desired comparison output.
Claim 17
Dependent Claim
167 words
An adaptive control method for an internal combustion engine having at least one engine control input and at least one engine output, said method comprising; measuring a value of said at least one engine output; supplying a value of said at least one engine control input to said input; determining a value of said at least one engine output as a predetermined function of said value of said at least one engine control input, said predetermined function having at least two parameters, each of said two parameters having a base value; comparing the measured value of said at least one engine output with the determined value of said at least one engine output and providing a comparison output; adjusting said base values of each of said at least two parameters based upon said comparison output; and adjusting, in response to said adjusted base values of each of said two parameters, said at least one value of said engine control input in order toprovide a desired comparison output.
Claim 18
Dependent Claim
52 words
A method as claimed in claim 14, in which said second adjusting step includes the steps of determining a correction value and adding said correction value to said value of said at least one engine control input so as to form a corrected value of said at least one engine control input.
Claim 19
Dependent Claim
42 words
A method as claimed in claim 14, further comprising the further step of superimposing a perturbation on the value of said at least one engine control input, said measuring step comprising measuring a change in the engine output resulting from the perturbation.
Claim 20
Dependent Claim
63 words
A method as claimed in claim 16, in which said determining step comprises determining a value of said at least one engine output as a derivative with respect to said at least one engine control input of a quadratic function of a change of said at least one value of the engine control input and said at least two parameters comprise two parameters.
Claim 21
Dependent Claim
23 words
A method as claimed in claim 17, in which said two parameters represent curvature and location of a maximum of the quadratic function.
Claim 22
Dependent Claim
100 words
A method as claimed in claim 18, in which said measuring step includes calculating successive sets of difference values, each set of difference values comprising (a) a value indicative of a difference between a present value and a preceding value of said at least one engine control input, (b) a value indicative of a difference between the square of the present value and the square of the preceding value of said at least one engine control input, and (c) a value indicative of a difference between a present value and a preceding value of said at least one engine output.
Claim 23
Dependent Claim
82 words
A method as claimed in claim 19, in which said first adjusting step includes the steps of (a) storing values of the two parameters as a function of engine operating conditions, (b) calculating adjusted values of said two parameters based upon stored values of the two parameters for prevailing engine conditions and from a prevailing set of difference values, and (c) replacing said stored values of said two parameters at the prevailing engine conditions with said adjusted values of the two parameters.
Claim 24
Dependent Claim
26 words
A method as claimed in claim 20, in which said first adjusting step includes the further step of constraining the adjusted values of said two parameters.
Claim 25
Dependent Claim
22 words
A method as claimed in claim 14, in which said at least one engine control input is an ignition timing control input.
Claim 26
Dependent Claim
23 words
A method as claimed in claim 14, in which said second adjusting step determines a corrected value of a further engine control input.
Claim 27
Dependent Claim
45 words
A method as claimed in claim 23, in which said at least one engine control input comprises two engine control inputs, one of said engine control inputs is an ignition timing control input and another of said engine control inputs is a fueling control input.
Claim 28
Dependent Claim
174 words
An adaptive control method for an internal combustion engine having at least two engine control inputs and at least one engine output, said control system comprising; measuring a value of said at least one engine output; supplying a value of a first one engine control input to one of said inputs; determining a value of said at least one engine output as a predetermined function of said value of said first one engine control input in said supplying step, said predetermined function having at least two parameters, each of said two parameters having a base value; comparing the measured value of said at least one engine output with the determined value of said at least one engine output and providing a comparison output; adjusting, in response to said comparison output, said base values of each of said at least two parameters; and adjusting, in response to said adjusted base values of each of said two parameters, at least one value of a second engine control input in order to provide a desired comparison output.
Claim 29
Dependent Claim
174 words
An adaptive control method for an internal combustion engine having at least two engine control inputs and at least one engine output, said control system comprising; measuring a value of said at least one engine output; supplying a value of a first one engine control input to one of said inputs; determining a value of said at least one engine output as a predetermined function of said value of said first one engine control input in said supplying step, said predetermined function having at least two parameters, each of said two parameters having a base value; comparing the measured value of said at least one engine output with the determined value of said at least one engine output and providing a comparison output; adjusting, in response to said comparison output, said base values of each of said at least two parameters; and adjusting, in response to said adjusted base values of each of said two parameters, at least one value of a second engine control input in order to provide a desired comparison output.
Claim 30
Dependent Claim
31 words
A method as claimed in claim 25, in which said first engine control input is an ignition timing control input and the second engine control input is a fueling control input.
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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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |