Patent US4589391A successfully refreshed from Google Patents.
US4589391A
Expired / Lapsed
US
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Controlling device for the start of injection in an internal combustion engine operating with self-ignition
Assignee: Robert Bosch GmbH
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Filing: 1982-09-13
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Granted: 1986-05-20
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Expires: 2002-09-13
Abstract
Abstract A device is proposed for controlling the injection start to a set-point value dependent on operating parameters, in which the period of time between the appearance of an injection start signal and a reference marking (for instance, a top-dead-center signal) is counted out and the result of counting is compared with the set-point value. To avoid malfunctioning, the triggering of the counting process is possible in only one, predetermined crankshaft angle range. Various values are provided for the counting-out frequency. In the exemplary embodiment they are within the range between 50 and 200 kHz. In case of failure, a control of injection onset is effected, and as needed, a limitation of the fuel quantity as well--for instance to 70% of the respectively determined quantity.
Inventors
- 👤 Albrecht Sieber
- 👤 Joachim Wawretzko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:11
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/2403; F02D41/30; F02D41/38; F02D41/40; F02D41/401; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06; F02D41/22; F02D2041/224; F02D2041/226; F02D2041/227; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft position, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising a counter means having a frequency signal input dependent on starting signals for counting the period of time elapsing between the actual value for the injection start and a reference marking relating to the crankshaft position, and means for comparing the output of said counter means with a set-point value for said governor.
Claim 2
Dependent Claim
107 words
A controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft position, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising a counter means having a frequency signal input dependent on starting signals for counting the period of time elapsing between the actual value for the injection start and a reference marking relating to the crankshaft position, and means for comparing the output of said counter means with a set-point value for said governor.
Claim 3
Dependent Claim
106 words
A controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft position, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising a counter means having a frequency signal input dependent on temperature for counting the period of time elapsing between the actual value for the injection start and a reference marking relating to the crankshaft position, and means for comparing the output of said counter means with a set-point value for said governor.
Claim 4
Dependent Claim
106 words
A controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft position, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising a counter means having a frequency signal input dependent on temperature for counting the period of time elapsing between the actual value for the injection start and a reference marking relating to the crankshaft position, and means for comparing the output of said counter means with a set-point value for said governor.
Claim 5
Dependent Claim
26 words
A controlling device as defined by claim 1, wherein said comparing means comprises means for converting said output of said counter means into an angle signal.
Claim 6
Dependent Claim
26 words
A controlling device as difined by claim 2, wherein said comparing means comprises means for converting said output of said counter means into an angle signal.
Claim 7
Independent Claim
113 words
A method for a controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft position, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising the steps of, counting by means of a frequency signal input dependent on starting signals the period of time elapsing between an actual value for the injection start and a reference marking relating to the crankshaft position, comparing the result of said counting step with a set-point value, and controlling the result of said comparing step.
Claim 8
Independent Claim
113 words
A method for a controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft position, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising the steps of, counting by means of a frequency signal input dependent on starting signals the period of time elapsing between an actual value for the injection start and a reference marking relating to the crankshaft position, comparing the result of said counting step with a set-point value, and controlling the result of said comparing step.
Claim 9
Independent Claim
112 words
A method for a controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft positon, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising the steps of, counting by means of a frequency signal input dependent on temperature the period of time elapsing between an actual value for the injection start and a reference marking relating to the crankshaft position, comparing the result of said counting step with a set-point value, and controlling the result of said comparing step.
Claim 10
Independent Claim
112 words
A method for a controlling device for the injection start in an internal combustion engine operating with self-ignition having sensors at least for the injection start, actual value of the crankshaft positon, load and temperature, a set-point injection start control and a governor for the signal for the difference between the set-point and the actual values, comprising the steps of, counting by means of a frequency signal input dependent on temperature the period of time elapsing between an actual value for the injection start and a reference marking relating to the crankshaft position, comparing the result of said counting step with a set-point value, and controlling the result of said comparing step.
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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |