US4284050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the mixture composition in an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1979-10-24
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Granted: 1981-08-18
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Expires: 1999-10-24
Abstract
Abstract An apparatus for the open-loop or closed-loop control of the composition of the mixture desired in the combustion chamber of an internal combustion engine, which includes an exhaust gas sensor whose output signal together with other operational parameters, determines the mixture composition. The essential component of the apparatus is a storage unit with which charging and discharging sources controllable in accordance with the sensor signal are associated, wherein the magnitude of the charging and discharging signal is dependent on operational parameters. The storage unit may comprise a capacitor or a resistor-capacitor combination having one terminal connected to ground and another terminal efficiently connected with an operational voltage connection, so as to have in this manner an unequivocal association with a fixed potential.
Inventors
- 👤 Wadym Suchowerskyj
- 👤 Peter Werner
- 👤 Hans Schnurle
- 👤 Werner Mohrle
- 👤 Urlich Drews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1477; F02D41/1482
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
204 words
In an apparatus for controlling the composition of a mixture delivered to a combustion chamber of an internal combustion engine which includes a plurality of operational parameter sensing means for controlling the quantity of fuel supplied to the engine as a function of said parameters, wherein said plurality of parameter sensing means includes an exhaust sensor, the improvement which comprises: an electrically charged storage means for storing an electrical quantity; charging source means, associated with said storage means and said plurality of operational parameter sensing means, for providing a charging current to charge said storage means, the initiation and duration of said charging current being controlled by said exhaust sensor, and the magnitude of said charging current being controlled by at least one of said operational parameter sensing means other than said exhaust sensor; and discharging source means, associated with said storage means and said plurality of operational parameter sensing means, for controlling a discharge current from said storage means to discharge said storage means, the initiation and duration of said discharge current being controlled by said exhaust sensor, and the magnitude of said discharge current being controlled by at least one of said operational parameter sensing means other than said exhaust sensing means.
Claim 2
Dependent Claim
204 words
In an apparatus for controlling the composition of a mixture delivered to a combustion chamber of an internal combustion engine which includes a plurality of operational parameter sensing means for controlling the quantity of fuel supplied to the engine as a function of said parameters, wherein said plurality of parameter sensing means includes an exhaust sensor, the improvement which comprises: an electrically charged storage means for storing an electrical quantity; charging source means, associated with said storage means and said plurality of operational parameter sensing means, for providing a charging current to charge said storage means, the initiation and duration of said charging current being controlled by said exhaust sensor, and the magnitude of said charging current being controlled by at least one of said operational parameter sensing means other than said exhaust sensor; and discharging source means, associated with said storage means and said plurality of operational parameter sensing means, for controlling a discharge current from said storage means to discharge said storage means, the initiation and duration of said discharge current being controlled by said exhaust sensor, and the magnitude of said discharge current being controlled by at least one of said operational parameter sensing means other than said exhaust sensing means.
Claim 3
Dependent Claim
15 words
An apparatus, as described in claim 1, wherein said exhaust sensor is an oxygen sensor.
Claim 4
Dependent Claim
57 words
An apparatus, as described in claim 1, wherein the magnitude of said charging current and the magnitude of said discharge current are controlled by the same at least one of said operational parameter sensing means other than said exhaust sensor, wherein the magnitudes of said charging and discharging currents are in a predetermined relationship to one another.
Claim 5
Dependent Claim
25 words
An apparatus, as described in claim 3, wherein said at least one of said operational parameter sensing means comprises a means for sensing engine rpm.
Claim 6
Dependent Claim
32 words
An apparatus, as described in claim 4, wherein said at least one of said operational parameter sensing means further comprises a means for sensing the quantity of air supplied to the engine.
Claim 7
Dependent Claim
31 words
An apparatus, as described in claim 3, wherein said at least one of said operational parameter sensing means comprises a means for sensing the quantity of air supplied to the engine.
Claim 8
Dependent Claim
32 words
An apparatus, as described in claim 1, wherein said at least one of said operational parameter sensing means controlling the magnitude of said charging current comprises a means for sensing engine rpm.
Claim 9
Dependent Claim
39 words
An apparatus, as described in claim 7, wherein said at least one of said operational parameter sensing means controlling the magnitude of said charging current further comprises a means for sensing the quantity of air supplied to the engine.
Claim 10
Dependent Claim
38 words
An apparatus, as described in claim 1, wherein said at least one of said operational parameter sensing means controlling the magnitude of said charging current comprises a means for sensing the quantity of air supplied to the engine.
Claim 11
Dependent Claim
32 words
An apparatus, as described in claim 1, wherein said at least one of said operational parameter sensing means controlling the magnitude of said discharge current comprises a means for sensing engine rpm.
Claim 12
Dependent Claim
39 words
An apparatus, as described in claim 10, wherein said at least one of said operational parameter sensing means controlling the magnitude of said discharging current further comprises a means for sensing the quantity of air supplied to the engine.
Claim 13
Dependent Claim
38 words
An apparatus, as described in claim 1, wherein said at least one of said operational parameter sensing means controlling the magnitude of said discharging current comprises a means for sensing the quantity of air supplied to the engine.
Claim 14
Dependent Claim
31 words
An apparatus, as described in claim 1, which further comprises control means for controlling the contents of said storage means to a predetermined value during an operational state of the engine.
Claim 15
Dependent Claim
19 words
An apparatus, as described in claim 13, wherein said operational state is a full-load operational state of the engine.
Claim 16
Dependent Claim
19 words
An apparatus, as described in claim 13, wherein said operational state is an overrunning operational state of the engine.
Claim 17
Dependent Claim
21 words
An apparatus, as described in claim 13, wherein said operational state is a a low oil operational state of the engine.
Claim 18
Dependent Claim
21 words
An apparatus, as described in claim 13, wherein said operational state is a low water temperature operational state of the engine.
Claim 19
Dependent Claim
20 words
An apparatus, as described in claim 13, wherein said operational state is an operational unreadiness condition of said exhaust sensor.
Claim 20
Dependent Claim
65 words
An apparatus, as described in claim 1, which further comprises: signal processing means having a first input connected to said storage means and a second input; and control means for supplying a predeterminable signal to said second input of said signal processing means during an operational state of said engine, to thus simulate a changed value of the electrical quantity stored by said storage means.
Claim 21
Dependent Claim
16 words
An apparatus, as described in claim 19, wherein said operational state is an engine acceleration process.
Claim 22
Dependent Claim
14 words
An apparatus, as described in claim 1, wherein said storage means comprises a capacitor.
Claim 23
Dependent Claim
15 words
An apparatus, as described in claim 1, wherein said storage means comprises a resistor-capacitor combination.
Claim 24
Dependent Claim
16 words
An apparatus, as described in claim 1, wherein said charging source means comprises a current mirror.
Claim 25
Dependent Claim
16 words
An apparatus, as described in claim 1, wherein said discharging source means comprises a current mirror.
Claim 26
Dependent Claim
60 words
An apparatus, as described in claim 1, wherein said at least one of said operational parameter sensing means controlling the magnitude of said charging current comprises an engine rpm sensor for producing an output voltage signal having an upper limit and a lower limit, said output voltage signal being proportional to the engine rpm between said upper and lower limits.
Claim 27
Dependent Claim
60 words
An apparatus, as described in claim 1, wherein said at least one of said operational parameter sensing means controlling the magnitude of said discharging current comprises an engine rpm sensor for producing an output voltage signal having an upper limit and a lower limit, said output voltage signal being proportional to the engine rpm between said upper and lower limits.
Claim 28
Dependent Claim
78 words
An apparatus, as described in claim 1, wherein said at least one of said operational parameter sensing means controlling the magnitude of said charging current and said at least one of said operational parameter sensing means controlling the magnitude of said discharge current comprises an engine rpm sensor for producing an output voltage signal having an upper limit and a lower limit, said output voltage signal being proportional to the engine rpm between said upper and lower limits.
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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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |