US3720193A
Expired / Lapsed
US
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Method and apparatus for coding and reading data governing the duration of energization of fuel injection in an internal combustion engine
Assignee: Societe des Procedes Modernes dInjection SOPROMI
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Filing: 1971-04-13
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Granted: 1973-03-13
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Expires: 1991-04-13
Abstract
Abstract An arrangement for coding and reading data representing the duration of fuel injection in an internal combustion engine comprising a pulse generator, such as a transparent cylinder driven by the engine shaft and on which are recorded a plurality of series of points distributed in accordance with a hyperbolic law and each series corresponding to pulses to be generated for a predetermined position of the power-controlling means such as the throttle valve in the input manifold of the engine. A detector is shifted under the control of said power-controlling means across said series of points so that at each revolution of the pulse generator a corresponding series of points is detected and transformed into a series of pulses, the interval of time between the pulses depending on the spacing of the points and on the speed of rotation of the said pulse generator, the detected pulses being transformed by a discriminator into a rectangular pulse, the width of which is dependent on the intervals between the detected pulses. The rectangular pulse is utilized to energize an electrically controlled fuel supply system for the duration of said rectangular pulse.
Inventors
- 👤 L Monpetit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:36
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/32; F02D29/00; F02D2700/00; F02D2700/07
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
176 words
An electrical fuel injection control system for supplying rectangular energizing signals to electromagnetic fuel injectors for internal combustion engines, the duration of the rectangular signals being a function of at least one operating parameter, wherein the improvement comprises: a. means for generating pulses to control the duration of each injection period, said pulse generating means including a moving surface, the speed of the surface being a function of the engine speed and the surface having a series of spaced detectable elements arranged thereon to pass a fixed reference point located in proximity of the surface, the spacing between successive adjacent elements increasing in the direction opposite to the direction of movement of the surface; b. sensing means disposed at the reference point for producing a short pulse in response to passage of each element past the sensing means; and c. means responsive to the time intervals between short pulses from the sensing means to generate a rectangular injection signal for as long as the time intervals between pulses are less than a predetermined reference time interval.
Claim 2
Dependent Claim
176 words
An electrical fuel injection control system for supplying rectangular energizing signals to electromagnetic fuel injectors for internal combustion engines, the duration of the rectangular signals being a function of at least one operating parameter, wherein the improvement comprises: a. means for generating pulses to control the duration of each injection period, said pulse generating means including a moving surface, the speed of the surface being a function of the engine speed and the surface having a series of spaced detectable elements arranged thereon to pass a fixed reference point located in proximity of the surface, the spacing between successive adjacent elements increasing in the direction opposite to the direction of movement of the surface; b. sensing means disposed at the reference point for producing a short pulse in response to passage of each element past the sensing means; and c. means responsive to the time intervals between short pulses from the sensing means to generate a rectangular injection signal for as long as the time intervals between pulses are less than a predetermined reference time interval.
Claim 3
Dependent Claim
176 words
An electrical fuel injection control system for supplying rectangular energizing signals to electromagnetic fuel injectors for internal combustion engines, the duration of the rectangular signals being a function of at least one operating parameter, wherein the improvement comprises: a. means for generating pulses to control the duration of each injection period, said pulse generating means including a moving surface, the speed of the surface being a function of the engine speed and the surface having a series of spaced detectable elements arranged thereon to pass a fixed reference point located in proximity of the surface, the spacing between successive adjacent elements increasing in the direction opposite to the direction of movement of the surface; b. sensing means disposed at the reference point for producing a short pulse in response to passage of each element past the sensing means; and c. means responsive to the time intervals between short pulses from the sensing means to generate a rectangular injection signal for as long as the time intervals between pulses are less than a predetermined reference time interval.
Claim 4
Dependent Claim
176 words
An electrical fuel injection control system for supplying rectangular energizing signals to electromagnetic fuel injectors for internal combustion engines, the duration of the rectangular signals being a function of at least one operating parameter, wherein the improvement comprises: a. means for generating pulses to control the duration of each injection period, said pulse generating means including a moving surface, the speed of the surface being a function of the engine speed and the surface having a series of spaced detectable elements arranged thereon to pass a fixed reference point located in proximity of the surface, the spacing between successive adjacent elements increasing in the direction opposite to the direction of movement of the surface; b. sensing means disposed at the reference point for producing a short pulse in response to passage of each element past the sensing means; and c. means responsive to the time intervals between short pulses from the sensing means to generate a rectangular injection signal for as long as the time intervals between pulses are less than a predetermined reference time interval.
Claim 5
Dependent Claim
85 words
The control system of claim 1 wherein the means responsive to the time intervals between short pulses for generating a rectangular signal comprises: a. first means responsive to the time interval between the first and second pulses in the series of pulses having the shortest time interval therebetween to initiate the rectangular signal and b. second means responsive to the first time interval between a subsequent pulse and the next preceding pulse that is longer than the reference time interval to terminate the rectangular signal.
Claim 6
Dependent Claim
41 words
The control system of claim 1 wherein the spacing between successive elements in each series increases according to a hyperbolic law, whereby the duration of injection for a given position of the sensing means is approximately constant regardless of engine speed.
Claim 7
Dependent Claim
50 words
The control system of claim 1 wherein the spacing between successive elements in each series increases according to a hyperbolic law modified by experimental operating data, whereby the duration of injection for each position of the sensing means varies with engine speed by an amount predetermined by the experimental data.
Claim 8
Dependent Claim
62 words
The control system of claim 1 further comprising means for moving the sensing means in response to at least one engine operating parameter to a plurality of reference points located on a line transverse to the direction of movement of the surface, the sensing means responding at each reference point to a corresponding series of elementS arranged to pass the reference point.
Claim 9
Dependent Claim
59 words
The control system of claim 5 wherein the elements of each series are connected in continuous lines to corresponding elements of series on adjacent paths scanned by the sensing means to permit smoothly continuous movement of the sensing means in response to said at least one engine parameter without interrupting the generation of pulses by the pulse generating means.
Claim 10
Dependent Claim
23 words
The control system of claim 5 wherein the means for moving the sensing means comprises a power-controlling means for the internal combustion engine.
Claim 11
Dependent Claim
28 words
The control system of claim 5 wherein the engine is a spark-ignition engine, and the means for moving the sensing means comprises a throttle-control means for the engine.
Claim 12
Dependent Claim
27 words
The combination set forth in claim 1 wherein the moving surface of said pulse generating means comprises a cylinder, and said sensing means comprise a light-sensitive means.
Claim 13
Dependent Claim
38 words
The combination set forth in claim 5 wherein the moving surface of said pulse generating means comprises a cylinder rotating in synchronism with the engine, and said detectable elements comprise lines inscribed on the surface of said cylinder.
Claim 14
Dependent Claim
46 words
The combination set forth in claim 10 wherein said sensing means comprises light responsive apparatus disposed with respect to said cylinders so that a pulse is produced each time one of said lines passes said sensing means as said cylinder rotates in synchronism with said engine.
Claim 15
Dependent Claim
29 words
The combination set forth in claim 11 wherein said means for moving said sensing means comprises means for moving said light responsive apparatus longitudinally with respect to said cylinder.
Claim 16
Dependent Claim
30 words
The combination set forth in claim 11 wherein said light responsive apparatus comprises a source of infrared rays and a detector in registry with said source disposed outside said cylinder.
Claim 17
Dependent Claim
36 words
The combination set forth in claim 11 wherein said light responsive apparatus comprises a source of visible light disposed within said cylinder and a light sensitive semiconductor in registry with said source disposed outside said cylinder.
Claim 18
Dependent Claim
212 words
In an internal combustion engine comprising an electrically controlled fuel supply system energized by a rectangular signal for the duration of said signal, the method of coding and reading data for controlling the duration of said rectangular signal in accordance with engine operating parameters, comprising the steps of: a. experimentally determining the fuel requirement characteristics for said engine as a function of two engine operating parameters one of which is the engine speed; b. recording said fuel requirement characteristics on a two-dimensional surface as a series of indicia; c. moving said surface past shiftable sensing means responsive to the presence of said indicia at a speed dependent on the rotary speed of said engine, said sensing means scanning in any of its positions those of the indicia situated on a common line along the direction of movement of said surface; d. producing a pulse each time one of said indicia moves past said sensing means; e. initiating a rectangular signal in response to at least the pulse produced by the first of said series of indicia; and f. terminating the rectangular signal as a function of the time interval between two succeeding pulses generated by the series of indicia; and g. applying said rectangular signal to said electrically controlled fuel supply system.
Claim 19
Dependent Claim
212 words
In an internal combustion engine comprising an electrically controlled fuel supply system energized by a rectangular signal for the duration of said signal, the method of coding and reading data for controlling the duration of said rectangular signal in accordance with engine operating parameters, comprising the steps of: a. experimentally determining the fuel requirement characteristics for said engine as a function of two engine operating parameters one of which is the engine speed; b. recording said fuel requirement characteristics on a two-dimensional surface as a series of indicia; c. moving said surface past shiftable sensing means responsive to the presence of said indicia at a speed dependent on the rotary speed of said engine, said sensing means scanning in any of its positions those of the indicia situated on a common line along the direction of movement of said surface; d. producing a pulse each time one of said indicia moves past said sensing means; e. initiating a rectangular signal in response to at least the pulse produced by the first of said series of indicia; and f. terminating the rectangular signal as a function of the time interval between two succeeding pulses generated by the series of indicia; and g. applying said rectangular signal to said electrically controlled fuel supply system.
Claim 20
Dependent Claim
125 words
The method set forth in claim 15 wherein: a. said characteristics are recorded as a plurality of series of points along circumferential substantially parallel lines on a hollow transparent cylinder, each series of points corresponding to a predetermined value of one of the engine operating parameters as a function of engine speed; b. corresponding points in each of said series are joined together to form a plurality of lines in a direction substantially different from the direction of movement of the surface of said cylindEr; and c. said cylinder is rotated so that said surface passes between a light source and light sensitive means to produce a pulse each time one of said lines crosses the area between said source and said light sensitive means.
Claim 21
Dependent Claim
42 words
The method set forth in claim 15 including the further step of shifting said light source and light sensitive means in a direction parallel to the longitudinal axis of said cylinder as the value of one of said engine operating parameters changes.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |