US4462361A
Expired / Lapsed
US
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Apparatus for generating a fuel quantity signal
Assignee: Robert Bosch GmbH
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Filing: 1982-09-21
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Granted: 1984-07-31
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Expires: 2002-09-21
Abstract
Abstract An apparatus for generating a fuel quantity signal in an injection pump is proposed, which is provided with a pump piston deflected by a cam disk which aspirates fuel out of a fuel inlet conduit provided with a magnetic valve and expresses it into a supply line. The metered fuel quantity is obtained on the basis of a metering onset signal and an end-of-metering signal, the first being generated by a position-sensor apparatus cooperating with the pump piston and the second being derived from the voltage applied at the magnetic valve.
Inventors
- 👤 Anton Karle
- 👤 Helmut Laufer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/20; F02M59/36; F02M59/366; F02D; F02D41/00; F02D41/30; F02D41/38; F02D41/40; F02D41/406; F02D41/408; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/125; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
An apparatus for generating a fuel quantity signal in an injection pump of an internal combustion engine having a pump piston actuated by a cam disk which cam slope is constant in the metering range, said pump piston encloses a pump work chamber connectable with a fuel inlet conduit and at least one outlet supply line, said fuel inlet conduit being provided with an electrically operated metering valve, a position-sensor means cooperating with said pump piston for generating a metering onset signal, and said electrically operated valve having a voltage supply means from which is derivable a metering endsignal upon closure of said valve.
Claim 2
Independent Claim
104 words
An apparatus for generating a fuel quantity signal in an injection pump of an internal combustion engine having a pump piston actuated by a cam disk which cam slope is constant in the metering range, said pump piston encloses a pump work chamber connectable with a fuel inlet conduit and at least one outlet supply line, said fuel inlet conduit being provided with an electrically operated metering valve, a position-sensor means cooperating with said pump piston for generating a metering onset signal, and said electrically operated valve having a voltage supply means from which is derivable a metering endsignal upon closure of said valve.
Claim 3
Dependent Claim
28 words
An apparatus as defined by claim 1, wherein said sensor means comprises an inductive transducer cooperating with a magnetic discontinuity preferably an annular groove on said pump piston.
Claim 4
Dependent Claim
28 words
An apparatus as defined by claim 1, wherein said sensor means comprises an inductive transducer cooperating with a magnetic discontinuity preferable a control edge on said pump piston.
Claim 5
Dependent Claim
19 words
An apparatus as defined by claim 2, wherein said inductive transducer comprises an annular coil surrounding said pump piston.
Claim 6
Dependent Claim
62 words
An apparatus as defined by claim 1, wherein said electrically operated valve is a magnetic valve and said end-of-metering signal is derived on the basis of to a course of the voltage of said voltage supply at a magnetic valve at a voltage bend in said course corresponding to the arrival of a valve needle upon a seat of said magnetic valve.
Claim 7
Dependent Claim
21 words
An apparatus as defined by claim 5, wherein said end-of-metering signal is obtained by the multiple differentiation of the voltage course.
Claim 8
Independent Claim
139 words
A method for generating a fuel quantity signal in an injection pump of an internal combustion engine having a pump piston actuated by a cam disk which cam slope is constant in the metering range, an electrically operated metering valve cooperating with a fuel inlet conduit leading to a pump work chamber confined by said pump piston, an outlet supply line discharging from said pump work chamber, an a position sensor means cooperating with said pump piston, comprising the steps of, generating a metering onset signal from said sensor means, deriving an end-of-metering signal from a voltage applied to said electrically operated valve, deriving an end-of-supply signal from the signal emitted by said position sensor means, and obtaining a supply onset signal on the basis of the end-of-supply signal by means of the metering stroke of the cam disk
Claim 9
Independent Claim
139 words
A method for generating a fuel quantity signal in an injection pump of an internal combustion engine having a pump piston actuated by a cam disk which cam slope is constant in the metering range, an electrically operated metering valve cooperating with a fuel inlet conduit leading to a pump work chamber confined by said pump piston, an outlet supply line discharging from said pump work chamber, an a position sensor means cooperating with said pump piston, comprising the steps of, generating a metering onset signal from said sensor means, deriving an end-of-metering signal from a voltage applied to said electrically operated valve, deriving an end-of-supply signal from the signal emitted by said position sensor means, and obtaining a supply onset signal on the basis of the end-of-supply signal by means of the metering stroke of the cam disk
Claim 10
Dependent Claim
60 words
A method as defined by claim 7, wherein said electrically operated valve is a magnetic valve and said end-of-metering signal is derived on the basis of to a course of the voltage at the magnetic valve at a voltage bend in said course corresponding to the arrival of to a valve needle upon to a seat of said magnetic valve.
Claim 11
Dependent Claim
21 words
A method as defined by claim 8, wherein said end-of-metering signal is obtained by the multiple differentation of the voltage course.
Claim 12
Dependent Claim
37 words
A method as defined by claim 7, wherein said end-of-supply signal together with a signal which represents top dead center of the engine, simultaneously serves for feedback of an injection adjuster position relative to top dead center.
References Cited (Backward Citations)
US3757750A
Cited
US4036193A
Cited
US4174694A
Cited
US4244342A
Cited
JPS555423A
Cited
JPS5675928A
Cited
US4297982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |