US4516550A
Expired / Lapsed
US
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Electronic control device for a fuel metering system of an internal combustion engine with self-ignition
Assignee: Robert Bosch GmbH
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Filing: 1984-05-07
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Granted: 1985-05-14
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Expires: 2004-05-07
Abstract
Abstract An electronic control device is proposed for a Diesel fuel metering system, in which at the onset of the starting procedure, a constant fuel quantity is pre-specified at first, and this quantity subsequently increases in steps or in a ramp-like manner. Above a predetermined rpm or starting quantity, an rpm-dependent reduction in quantity takes place, to 90% of the full-load quantity. The open-loop or closed-loop control of the starting quantity ends upon the attainment of a speed of 800 rpm, for example. Both an analog and a computerized realization of the control device are provided, and the control device according to the invention is capable of dispensing with the processing of a temperature signal and can thus dispense with the use of one temperature sensor.
Inventors
- 👤 Rainer Buck
- 👤 Thomas Kuttner
- 👤 Fridolin Piwonka
- 👤 Wolf Wessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02D41/02; F02D41/04; F02D41/06; F02D41/061; F02D41/062; F02D41/064; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
116 words
A method for determining a fuel quantity control signal in a fuel metering system of an internal combustion engine with self-ignition, having sensors for operating parameters and function transducers for a set-point value of the fuel quantity in accordance with operating parameters, comprising the steps of, pre-specifying at least one of a time-dependent starting fuel quantity and an rpm-dependent starting fuel quantity as the fuel quantity control signal during starting below a predetermined rpm value, selecting the set-point value of the fuel quantity as the fuel quantity control signal during starting above a predetermined rpm value that is below idle speed, and reducing the set-point value of the fuel quantity at least in accordance with rpm.
Claim 2
Independent Claim
116 words
A method for determining a fuel quantity control signal in a fuel metering system of an internal combustion engine with self-ignition, having sensors for operating parameters and function transducers for a set-point value of the fuel quantity in accordance with operating parameters, comprising the steps of, pre-specifying at least one of a time-dependent starting fuel quantity and an rpm-dependent starting fuel quantity as the fuel quantity control signal during starting below a predetermined rpm value, selecting the set-point value of the fuel quantity as the fuel quantity control signal during starting above a predetermined rpm value that is below idle speed, and reducing the set-point value of the fuel quantity at least in accordance with rpm.
Claim 3
Independent Claim
119 words
A method for determining a fuel quantity control signal in a fuel metering system of an internal combustion engine with self-ignition, having sensors for operating parameters and function transducers for a set-point value of the fuel quantity in accordance with operating parameters, comprising the steps of, pre-specifying at least one of a time-dependent starting fuel quantity and an rpm-dependent starting fuel quantity as the fuel quantity control signal during starting below a predetermined fuel quantity value, selecting the set-point value of the fuel quantity as the fuel quantity control signal during starting above a predetermined fuel quantity value that is above idle fuel quantity, and reducing the set-point value of the fuel quantity at least in accordance with rpm.
Claim 4
Independent Claim
119 words
A method for determining a fuel quantity control signal in a fuel metering system of an internal combustion engine with self-ignition, having sensors for operating parameters and function transducers for a set-point value of the fuel quantity in accordance with operating parameters, comprising the steps of, pre-specifying at least one of a time-dependent starting fuel quantity and an rpm-dependent starting fuel quantity as the fuel quantity control signal during starting below a predetermined fuel quantity value, selecting the set-point value of the fuel quantity as the fuel quantity control signal during starting above a predetermined fuel quantity value that is above idle fuel quantity, and reducing the set-point value of the fuel quantity at least in accordance with rpm.
Claim 5
Dependent Claim
30 words
A method as defined by claim 1, wherein the time-dependent function for said starting fuel quantity has a constant value at the outset and then increases in a ramp-like manner.
Claim 6
Dependent Claim
31 words
A method as defined by claim 1, wherein the time-dependent function for said starting fuel quantity has a constant value at the outset and then increases in a stepped, non-linear manner.
Claim 7
Dependent Claim
16 words
A method as defined by claim 1, wherein the set-point fuel quantity decreases with increasing rpm.
Claim 8
Dependent Claim
43 words
A method as defined by claim 1, further comprising the steps of, beginning the supply of fuel above a speed of preferably 60 rpm, and determining the fuel metering independent of the starting quantity signal generation above a speed of preferably 800 rpm.
Claim 9
Dependent Claim
106 words
An electronic control device for a fuel metering system of an internal combustion engine with self ignition, having sensors for operating parameters and function transducers for generating a set-point value of the fuel quantity in accordance with operating parameters, comprising, means responsive to a starter signal switch for generating at least one of a time-dependent starting quantity signal, and an rpm-dependent quantity signal below a predetermined value as a fuel quantity control signal, and selection means responsive to both said quantity signals for selecting said set-point value of the fuel quantity during starting above a predetermined value, as said fuel quantity control signal to said engine.
Claim 10
Dependent Claim
106 words
An electronic control device for a fuel metering system of an internal combustion engine with self ignition, having sensors for operating parameters and function transducers for generating a set-point value of the fuel quantity in accordance with operating parameters, comprising, means responsive to a starter signal switch for generating at least one of a time-dependent starting quantity signal, and an rpm-dependent quantity signal below a predetermined value as a fuel quantity control signal, and selection means responsive to both said quantity signals for selecting said set-point value of the fuel quantity during starting above a predetermined value, as said fuel quantity control signal to said engine.
Claim 11
Dependent Claim
63 words
An electronic control device according to claim 7, wherein said selection means comprises a minimum value selection circuit and a maximum value selection circuit, and a function generator connected to said maximum value selection circuit for generating a reference signal thereto, whereby said maximum value circuit is responsive to said fuel quantity control signal and said reference signal for controlling said set-point value.
Claim 12
Dependent Claim
30 words
A method as defined by claim 2, wherein the time-dependent function for said starting fuel quantity has a constant value at the outset and then increases in a ramp-like manner.
Claim 13
Dependent Claim
31 words
A method as defined by claim 2, wherein the time-dependent function for said starting fuel quantity has a constant value at the outset and then increases in a stepped, non-linear manner.
Claim 14
Dependent Claim
16 words
A method as defined by claim 2, wherein the set-point fuel quantity decreases with increasing rpm.
Claim 15
Dependent Claim
43 words
A method as defined by claim 2, further comprising the steps of, beginning the supply of fuel above a speed of preferably 60 rpm, and determing the fuel metering independent of the starting quantity signal generation above a speed of preferably 800 rpm.
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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |