Patent US872027A successfully refreshed from Google Patents.
Patent US5070836A successfully refreshed from Google Patents.
US5070836A
Expired / Lapsed
US
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Method and arrangement for controlling the injection of fuel in an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1990-09-05
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Granted: 1991-12-10
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Expires: 2010-09-05
Abstract
Abstract The invention is directed to a method and an arrangement for controlling the fuel injection in a high-pressure fuel pump. Magnetic valves determine the fuel quantity to be injected into the engine. The magnetic valve is controlled during the pumping phase of the pumping element in such a manner that first a preinjection and then a main injection is carried out. In specific operating conditions, the control apparatus determines the duration of the drive pulses for the magnetic valve at which a preinjection just takes place. With the duration of the drive pulses as a basis, the control apparatus forms compensating signals for the drive pulses which effect preinjection and stores the same.
Inventors
- 👤 Josef Wahl
- 👤 Alf Loffler
- 👤 Hermann Grieshaber
- 👤 Wilhelm Polach
- 👤 Ewald Eblen
- 👤 Joachim Tauscher
- 👤 Helmut Laufer
- 👤 Ulrich Flaig
- 👤 Johannes Locher
- 👤 Manfred Birk
- 👤 Gerhard Engel
- 👤 Alfred Schmitt
- 👤 Pierre Lauvin
- 👤 Fridolin Piwonka
- 👤 Anton Karle
- 👤 Hermann Kull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:32
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02D41/40; F02D41/402; F02D41/403; F02D35/00; F02D35/02; F02D35/023; F02D41/24; F02D41/2406; F02D41/2425; F02D41/2429; F02D41/2451; F02D41/2464; F02D41/2467; F02D41/247; F02B; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
An arrangement for controlling the injection of fuel in a high-pressure fuel pump having a pumping element and wherein at least one magnetic valve determines the quantity of fuel to be injected into the engine, the arrangement comprising: means for driving the magnetic valve with drive pulses during the pumping phase of the pumping element so as to cause first a preinjection and then a main injection to be carried out; means for determining the duration of the drive pulse for specific operating conditions of the engine which just causes the preinjection to start; and, means for forming and storing compensating signals for drive pulses which effect the preinjection with these signals being based upon the duration.
Claim 2
Dependent Claim
117 words
An arrangement for controlling the injection of fuel in a high-pressure fuel pump having a pumping element and wherein at least one magnetic valve determines the quantity of fuel to be injected into the engine, the arrangement comprising: means for driving the magnetic valve with drive pulses during the pumping phase of the pumping element so as to cause first a preinjection and then a main injection to be carried out; means for determining the duration of the drive pulse for specific operating conditions of the engine which just causes the preinjection to start; and, means for forming and storing compensating signals for drive pulses which effect the preinjection with these signals being based upon the duration.
Claim 3
Independent Claim
114 words
A method for controlling the injection of fuel in a high-pressure fuel pump having a pumping element and wherein at least one magnetic valve determines the quantity of fuel to be injected into the engine, the method comprising the steps of: driving the magnetic valve with drive pulses during the pumping phase of the pumping element so as to cause first a preinjection and then a main injection to be carried out; determining the duration of the drive pulse for specific operating conditions of the engine which just causes the preinjection to start; and, forming and storing compensating signals for drive pulses which effect the preinjection with these signals being based upon the duration.
Claim 4
Independent Claim
114 words
A method for controlling the injection of fuel in a high-pressure fuel pump having a pumping element and wherein at least one magnetic valve determines the quantity of fuel to be injected into the engine, the method comprising the steps of: driving the magnetic valve with drive pulses during the pumping phase of the pumping element so as to cause first a preinjection and then a main injection to be carried out; determining the duration of the drive pulse for specific operating conditions of the engine which just causes the preinjection to start; and, forming and storing compensating signals for drive pulses which effect the preinjection with these signals being based upon the duration.
Claim 5
Dependent Claim
19 words
The method of claim 2, wherein the compensating signals are determined once directly after the engine has been manufactured.
Claim 6
Dependent Claim
18 words
The method of claim 2, wherein the compensating signals for the preinjection are determined in stead-state operating points.
Claim 7
Dependent Claim
23 words
The method of claim 2, wherein the compensating signals are stored in a characteristic field as a function of load and engine speed.
Claim 8
Dependent Claim
23 words
The method of claim 2, wherein the drive pulses of the main injection are held constant during the determination of the compensating signals.
Claim 9
Dependent Claim
19 words
The method of claim 2, wherein the compensating signals for the preinjection are determined and stored for each cylinder.
Claim 10
Dependent Claim
15 words
The method of claim 2, wherein the compensating signals are determined once at specific intervals.
Claim 11
Dependent Claim
40 words
The method of claim 2, comprising the further steps of: detecting a drive pulse for which no preinjection occurs; and, then increasing the duration of the drive pulse until a feed back signal is detected indicating that a preinjection occurs.
Claim 12
Dependent Claim
37 words
The method of claim 9, wherein one of the following variables is used as the feedback signal: injection duration, element pressure, combustion chamber pressure, engine body sound, air sound, and a light signal in the combustion chamber.
Claim 13
Dependent Claim
20 words
The method of claim 10, wherein the feedback signal is viewed in correlation with the drive signal of the preinjection.
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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) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |