US3935846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for the digital-electronic control of inlet, exhaustion and injection valves as well as of the injection in internal combustion engines
Assignee: Daimler Benz AG
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Filing: 1974-09-03
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Granted: 1976-02-03
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Expires: 1994-09-03
Abstract
Abstract A system for the digital-electronic control of the inlet-, exhaust and possibly injection valves as well as of the ignition of internal combustion engines, especially of motor vehicle internal combustion engines, in which the valves are electromagnetically actuated and the respective crankshaft position is adapted to be detected digitally; a fixed value memory or storage device is provided in which at least for one cylinder the opening and closing instants of the inlet, exhaust, and possibly of the injection valves and/or of the ignition instants are at least partly adapted to be stored and selected as digital values coordinated to the respective operating conditions and corresponding to a predetermined crankshaft position in the form of data sets; a storage register is provided for each stored value of a data set to which this stored value is adapted to be transferred; a pulse comparison unit is also provided for each value of a data set in which the value either stored in the storage register or fixedly predetermined is adapted to be compared with the respective crankshaft position and from which, in case of agreement of the two values, a commencing pulse is adapted to be produced; a follower pulse generator is additionally provided at least for each value of a data set in which, beginning and together with the commencing pulse, a number of pulses corresponding to the number of cylinders, uniformly distributed over 720° of the crankshaft, is adapted to be produced and is adapted to be fed to the valve-actuating group and/or ignition device of the associated cylinders in a sequence corresponding to the ignition sequence.
Inventors
- 👤 Hermann Zelenka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:30
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/32; F02D41/36; F02D41/365; F01; F01L; F01L9/00; F01L9/20; F02D41/24; F02D41/2406; F02D41/2409; F02D41/2412; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
283 words
A control installation for the digital-electronic control of at least one of valve means and ignition means in internal combustion engines, in which the valve means are electromagnetically actuated and the respective crankshaft position is adapted to be determined digitally, characterized in that it comprises control circuit means including a fixed value storage means in which at least for one cylinder of the engine, at least one of opening and closing points of time of the valve means, on the one hand, and ignition points of time, on the other, are operable to be at least partially stored and selected as digital values coordinated to the respective operating conditions and corresponding to a predetermined crankshaft position in the form of data sets, storage register means for each stored value of a data set operatively connected to the fixed value storage means; the stored value being transferable to the storage register means, pulse comparison means for each value of a data set operatively connected to the storage register means, in which a value is adapted to be compared with the respective crankshaft position and which is operable to produce a commencing pulse in case of agreement of the two values, and a follower pulse generator means at least for each value of a data set operatively connected with the respective comparison means in which, beginning and together with the commencing pulse, a number of pulses corresponding to the number of cylinders is produced, uniformly distributed over a predetermined number of degrees of the crankshaft, and means for feeding the last-mentioned pulses to at least one of valve actuating means and ignition means of the associated cylinder in a sequence corresponding to the ignition sequence.
Claim 2
Dependent Claim
283 words
A control installation for the digital-electronic control of at least one of valve means and ignition means in internal combustion engines, in which the valve means are electromagnetically actuated and the respective crankshaft position is adapted to be determined digitally, characterized in that it comprises control circuit means including a fixed value storage means in which at least for one cylinder of the engine, at least one of opening and closing points of time of the valve means, on the one hand, and ignition points of time, on the other, are operable to be at least partially stored and selected as digital values coordinated to the respective operating conditions and corresponding to a predetermined crankshaft position in the form of data sets, storage register means for each stored value of a data set operatively connected to the fixed value storage means; the stored value being transferable to the storage register means, pulse comparison means for each value of a data set operatively connected to the storage register means, in which a value is adapted to be compared with the respective crankshaft position and which is operable to produce a commencing pulse in case of agreement of the two values, and a follower pulse generator means at least for each value of a data set operatively connected with the respective comparison means in which, beginning and together with the commencing pulse, a number of pulses corresponding to the number of cylinders is produced, uniformly distributed over a predetermined number of degrees of the crankshaft, and means for feeding the last-mentioned pulses to at least one of valve actuating means and ignition means of the associated cylinder in a sequence corresponding to the ignition sequence.
Claim 3
Dependent Claim
20 words
An installation according to claim 1, characterized in that the valves include inlet and outlet valves means of the engine.
Claim 4
Dependent Claim
19 words
An installation according to claim 2, characterized in that the valve means include inlet, exhaust and injection valve means.
Claim 5
Dependent Claim
44 words
An installation according to claim 3, characterized in that the fixed value storage means is operable to store and select at least in part the opening and closing points of time of said valve means as digital values in the form of data sets.
Claim 6
Dependent Claim
37 words
An installation according to claim 4, characterized in that the fixed value storage means is operable to at least partly store and select the ignition points of time as digital values in the form of data sets.
Claim 7
Dependent Claim
30 words
An installation according to claim 5, characterized in that the pulse comparison means is operable to compare the values stored in the storage register means with the respective crankshaft position.
Claim 8
Dependent Claim
25 words
An installation according to claim 5, characterized in that the pulse comparison means is operable to compare fixedly predetermined values with the respective crankshaft position.
Claim 9
Dependent Claim
29 words
An installation according to claim 5, characterized in that the number of pulses produced by the follower pulse generator means is fed to valve-actuating means of the associated cylinder.
Claim 10
Dependent Claim
38 words
An installation according to claim 8, characterized in that the number of pulses produced by the follower pulse generator means is fed to the ignition means of the associated cylinder in a sequence corresponding to the ignition sequence.
Claim 11
Dependent Claim
59 words
An installation according to claim 9, characterized in that a pulse transmitter means is provided which produces pulses during the rotation of the crankshaft, a predetermined number of pulses being coordinated respectively to two crankshaft rotations corresponding to 720°, and which additionally produces after each two rotations of the crankshaft, a synchronizing pulse corresponding to a preferred crankshaft position.
Claim 12
Dependent Claim
16 words
An installation according to claim 10, characterized in that the installation is for a four-cycle engine.
Claim 13
Dependent Claim
76 words
An installation according to claim 10, characterized in that a crankshaft pulse counter means is provided in the circuit means, which includes a pulse counter means having a counting capacity corresponding to a number of pulses of 180° crankshaft rotation, and a sector counter means operatively connected with the pulse counter means having a counter capacity corresponding to the number of the 180° sectors per operating cycle and whose counting cycle begins with the synchronizing pulse.
Claim 14
Dependent Claim
81 words
An installation according to claim 12, characterized in that one follower pulse generator means is provided in the circuit means for each value of a data set which includes a follower pulse counter means having a counting capacity corresponding to a number of pulses of 720°, divided by the number of cylinders, and a distributor counter means operatively connected therewith and having a counting capacity corresponding to the number of cylinders and whose counting cycle begins with the associated commencing pulse.
Claim 15
Dependent Claim
63 words
An installation according to claim 13, characterized in that for each valve means an actuating means is provided which includes a reset flip-flop means operable to be set by the associated opening pulse and to be reset by the associated closing pulse, and amplifier means operatively connected with the output of the flip-flop means which is operable to control the electromagnetic valve means.
Claim 16
Dependent Claim
75 words
An installation according to claim 14, characterized in that with a sequential value output from the fixed value storage means, a control generator means with an astable multivibrator means is provided in the circuit means which upon appearance of a read-out command, immediately commences with a pulse rise and transmits a number of pulses corresponding to the number of the stored values of a data set to a counter means for forming the partial addresses.
Claim 17
Dependent Claim
38 words
An installation according to claim 15, characterized in that a means is provided which during the starting of the engine produces a start pulse which is operable to set all counter and multivibrator means into the starting position.
Claim 18
Dependent Claim
27 words
An installation according to claim 16, characterized in that a safety circuit means is provided which in case of an occurring disturbance, closes the injection valve means.
Claim 19
Dependent Claim
16 words
An installation according to claim 17, characterized in that the installation is for a four-cycle engine.
Claim 20
Dependent Claim
37 words
An installation according to claim 1, characterized in that the fixed value storage means is operable to at least partly store and select the ignition points of time as digital values in the form of data sets.
Claim 21
Dependent Claim
44 words
An installation according to claim 1, characterized in that the fixed value storage means is operable to store and select at least in part the opening and closing points of time of said valve means as digital values in the form of data sets.
Claim 22
Dependent Claim
30 words
An installation according to claim 1, characterized in that the pulse comparison means is operable to compare the values stored in the storage register means with the respective crankshaft position.
Claim 23
Dependent Claim
25 words
An installation according to claim 1, characterized in that the pulse comparison means is operable to compare fixedly predetermined values with the respective crankshaft position.
Claim 24
Dependent Claim
59 words
An installation according to claim 1, characterized in that a pulse transmitter means is provided which produces pulses during the rotation of the crankshaft, a predetermined number of pulses being coordinated respectively to two crankshaft rotations corresponding to 720°, and which additionally produces after each two rotations of the crankshaft, a synchronizing pulse corresponding to a preferred crankshaft position.
Claim 25
Dependent Claim
16 words
An installation according to claim 23, characterized in that the installation is for a four-cycle engine.
Claim 26
Dependent Claim
76 words
An installation according to claim 1, characterized in that a crankshaft pulse counter means is provided in the circuit means, which includes a pulse counter means having a counting capacity corresponding to a number of pulses of 180° crankshaft rotation, and a sector counter means operatively connected with the pulse counter means having a counter capacity corresponding to the number of the 180° sectors per operating cycle and whose counting cycle begins with the synchronizing pulse.
Claim 27
Dependent Claim
81 words
An installation according to claim 25, characterized in that one follower pulse generator means is provided in the circuit means for each value of a data set which includes a follower pulse counter means having a counting capacity corresponding to a number of pulses of 720°, divided by the number of cylinders, and a distributor counter means operatively connected therewith and having a counting capacity corresponding to the number of cylinders and whose counting cycle begins with the associated commencing pulse.
Claim 28
Dependent Claim
63 words
An installation according to claim 1, characterized in that for each valve means an actuating means is provided which includes a reset flip-flop means operable to be set by the associated opening pulse and to be reset by the associated closing pulse, and amplifier means operatively connected with the output of the flip-flop means which is operable to control the electromagnetic valve means.
Claim 29
Dependent Claim
75 words
An installation according to claim 1, characterized in that with a sequential value output from the fixed value storage means, a control generator means with an astable multivibrator means is provided in the circuit means which upon appearance of a read-out command, immediately commences with a pulse rise and transmits a number of pulses corresponding to the number of the stored values of a data set to a counter means for forming the partial addresses.
Claim 30
Dependent Claim
38 words
An installation according to claim 1, characterized in that a means is provided which during the starting of the engine produces a start pulse which is operable to set all counter and multivibrator means into the starting position.
Claim 31
Dependent Claim
27 words
An installation according to claim 1, characterized in that a safety circuit means is provided which in case of an occurring disturbance, closes the injection valve means.
Claim 32
Dependent Claim
44 words
An installation according to claim 1, wherein said control circuit means includes selecting means responsive to the operating conditions of the engine for selecting in the form of data sets digital values from said fixed value storage means corresponding to predetermined crank shaft positions.
Claim 33
Dependent Claim
45 words
An installation according to claim 31, wherein said pulse comparison means compares the selected value of the data set corresponding to a predetermined crankshaft position with continuously changing values of crankshaft position and produces a commencing pulse in case of agreement of the two values.
References Cited (Backward Citations)
US3454871A
Cited
US3689753A
Cited
US3835821A
Cited
US3757755A
Cited
US3834362A
Cited
US3749073A
Cited
US3752139A
Cited
US3738339A
Cited
US3862404A
Cited
US3838397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |