US5609140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel supply system for an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1995-10-30
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Granted: 1997-03-11
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Expires: 2015-10-30
Abstract
Abstract In a fuel supply system for an internal combustion engine, significant parameters such as fuel pressure and fuel flow rate are determined continuously from measured variables with the aid of an observer. These variables which have been determined are used to achieve fuel delivery performed with regard to a requirement, the control operations being carried out as a function of requirements of the internal combustion engine by the control unit itself.
Inventors
- 👤 Claus Kramer
- 👤 Armin-Maria Verhagen
- 👤 Dietrich Trachte
- 👤 Gerhard Keuper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02D41/3809; F02D41/3836; F02D41/3845; F02D41/02; F02D41/14; F02D41/1401; F02D41/3082; F02D2041/1413; F02D2041/1415; F02D2041/1416; F02D2041/1433; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/0602; F02D2200/0604
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
A fuel supply system for an internal combustion engine having at least one injection valve, the fuel system comprising: an electric fuel pump for providing a flow of fuel, the electric fuel pump having a voltage, a current, a speed of rotation, and a torque; and an electronic system for determining a pressure of the fuel and a rate of the fuel flow as a function of at least one of the voltage, current, speed of rotation, and torque of the electric fuel pump to control the at least one injection valve.
Claim 2
Dependent Claim
92 words
A fuel supply system for an internal combustion engine having at least one injection valve, the fuel system comprising: an electric fuel pump for providing a flow of fuel, the electric fuel pump having a voltage, a current, a speed of rotation, and a torque; and an electronic system for determining a pressure of the fuel and a rate of the fuel flow as a function of at least one of the voltage, current, speed of rotation, and torque of the electric fuel pump to control the at least one injection valve.
Claim 3
Dependent Claim
13 words
The system according to claim 1, wherein the electronic system includes an observer.
Claim 4
Dependent Claim
38 words
The system according to claim 2, further comprising a control unit coupled to the electronic system for controlling a fuel injection time as a function of at least the determined fuel pressure and the determined fuel flow rate.
Claim 5
Dependent Claim
31 words
The system according to claim 3, wherein the observer utilizes a pump model, and the control unit forms a pressure correction value and transmits the pressure correction value to the observer.
Claim 6
Dependent Claim
37 words
The system according to claim 2, further comprising a pressure sensor for measuring the fuel pressure, the observer influencing a pressure at each of a plurality of injection valves as a function of the measured fuel pressure.
Claim 7
Dependent Claim
16 words
The system according to claim 5, wherein the pressure is influenced via a fuel line model.
Claim 8
Dependent Claim
21 words
The system according to claim 3, wherein the control unit controls a quantity of fuel in accordance with a predetermined requirement.
Claim 9
Dependent Claim
32 words
The system according to claim 3, wherein an output of the fuel pump is not matched to a cold-starting requirement, and the fuel pressure is increased when a cold start is detected.
Claim 10
Dependent Claim
100 words
A fuel supply system for an internal combustion engine having at least one injection valve, the fuel system comprising: an uncontrolled electric fuel pump for providing a flow of fuel; and an electronic system for determining a pressure of the fuel and a rate of the fuel flow as a function of a plurality of measured operating variables specific to at least one of the engine and the fuel pump, the electronic system controlling the at least one injection valve as a function of at least one of the pressure of the fuel and the rate of the fuel flow.
Claim 11
Dependent Claim
100 words
A fuel supply system for an internal combustion engine having at least one injection valve, the fuel system comprising: an uncontrolled electric fuel pump for providing a flow of fuel; and an electronic system for determining a pressure of the fuel and a rate of the fuel flow as a function of a plurality of measured operating variables specific to at least one of the engine and the fuel pump, the electronic system controlling the at least one injection valve as a function of at least one of the pressure of the fuel and the rate of the fuel flow.
References Cited (Backward Citations)
DE2808731A1
Cited
US4940034A
Cited
US4926829A
Cited
US5085193A
Cited
US5411002A
Cited
US5477833A
Cited
US5218941A
Cited
US5406922A
Cited
US5237975A
Cited
US5483940A
Cited
US5355859A
Cited
US5379741A
Cited
US5501196A
Cited
US5479910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-10 | 2000-09-09 | 2001-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-10 | 2004-09-09 | 2005-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-10 | 2008-09-09 | 2009-03-11 | $7700.00 | Window Closed / Lapsed |