US5261374A
Expired / Lapsed
US
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Method and apparatus for controlling a solenoid-valve-controlled fuel-metering system
Assignee: Robert Bosch GmbH
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Filing: 1992-05-18
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Granted: 1993-11-16
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Expires: 2012-05-18
Abstract
Abstract A method and apparatus for controlling a solenoid-valve-controlled fuel-metering system, especially for a diesel internal combustion engine, provide an electronic control device, which calculates a starting time and/or a stopping time for a solenoid valve based upon at least one of an injection start variable and a feed duration variable. An angle variable is calculated based upon a time variable, taking into consideration at least one of an instantaneous rotational speed and a correction angle.
Inventors
- 👤 Roland Gronenberg
- 👤 Werner Fischer
- 👤 Peter Schmitz
- 👤 Dietbert Schoenfelder
- 👤 Joachim Tauscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:36
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
132 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for actuating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and a correction angle; extrapolating a first angle variable based upon a first instantaneous rotational speed of the engine; interpolating a second angle variable based upon a second instantaneous rotational speed of the engine, and controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle variables.
Claim 2
Independent Claim
132 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for actuating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and a correction angle; extrapolating a first angle variable based upon a first instantaneous rotational speed of the engine; interpolating a second angle variable based upon a second instantaneous rotational speed of the engine, and controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle variables.
Claim 3
Independent Claim
160 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for activating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an angle variable indicative of one of an actual start of flow of fuel to the engine and an actual end of flow of fuel to the engine, said angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and a correctional angle; extrapolating a first angle variable based upon a first instantaneous rotational speed of the engine; interpolating a second angle variable based upon a second instantaneous rotational speed of the engine, and controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle variables.
Claim 4
Independent Claim
160 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for activating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an angle variable indicative of one of an actual start of flow of fuel to the engine and an actual end of flow of fuel to the engine, said angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and a correctional angle; extrapolating a first angle variable based upon a first instantaneous rotational speed of the engine; interpolating a second angle variable based upon a second instantaneous rotational speed of the engine, and controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle variables.
Claim 5
Dependent Claim
43 words
The method as recited in claim 1 or 2, further comprising the steps of: detecting the first instantaneous rotational speed of the engine in a first time increment; and detecting the second instantaneous rotational speed of the engine in a second time increment.
Claim 6
Dependent Claim
18 words
The method as recited in claim 3, wherein the second time increment immediately follows the first time increment.
Claim 7
Dependent Claim
17 words
The method as recited in claim 3, wherein the time variable lies within the second time increment.
Claim 8
Dependent Claim
28 words
The method as recited in claim 1 or 2, further comprising the step of adding the first angle variable with the correction angle to determine the angle variable.
Claim 9
Dependent Claim
26 words
The method as recited in claim 1 or 2, further comprising the step of determining a difference angle based upon the first and second angle variables.
Claim 10
Dependent Claim
26 words
The method as recited in claim 7, further comprising the step of adding the correction angle and the difference angle to form a subsequent correction angle.
Claim 11
Dependent Claim
39 words
The method as recited in claim 1 or 2, wherein the angle variable is indicative of one of an actual start of flow of fuel to the engine and an actual end of flow of fuel to the engine.
Claim 12
Independent Claim
118 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for actuating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and a correction angle; determining an extrapolation angle; determining an interpolation angle; determining a first difference angle between the extrapolation angle and the interpolation angle; and determining the correction angle based upon the first difference angle.
Claim 13
Independent Claim
118 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for actuating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and a correction angle; determining an extrapolation angle; determining an interpolation angle; determining a first difference angle between the extrapolation angle and the interpolation angle; and determining the correction angle based upon the first difference angle.
Claim 14
Independent Claim
146 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for activating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an extrapolation angle; determining an interpolation angle; determining a first difference angle between the extrapolation angle and the interpolation angle; determining a correction angle based upon the first difference angle; and determining an angle variable indicative of one of an actual start of flow of fuel to the engine and an actual end of flow of fuel to the engine, said angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and the correction angle.
Claim 15
Independent Claim
146 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining at least one of a starting time and a stopping time for activating the solenoid valve based upon at least one of a feed start variable and a feed duration variable; determining an extrapolation angle; determining an interpolation angle; determining a first difference angle between the extrapolation angle and the interpolation angle; determining a correction angle based upon the first difference angle; and determining an angle variable indicative of one of an actual start of flow of fuel to the engine and an actual end of flow of fuel to the engine, said angle variable based upon a time variable indicative of an actual flow of fuel to the engine, and based upon at least one of an instantaneous rotational speed of the engine and the correction angle.
Claim 16
Dependent Claim
25 words
The method as recited in claim 10 or 11, further comprising the step of determining an injection start angle variable based upon the correction angle.
Claim 17
Dependent Claim
24 words
The method as recited in claim 10 or 11, further comprising the step of multiplying the first difference angle by a preselected first factor.
Claim 18
Dependent Claim
51 words
The method as recited in claim 10 or 11, further comprising the steps of: determining a second difference angle between an injection end angle variable and the interpolation angle; multiplying the second difference angle by a preselected second factor; and determining the correction angle based upon the multiplied second difference angle.
Claim 19
Independent Claim
82 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining a rotational speed of the engine; determining a time value indicative of one of a start of flow of fuel to the engine and an end of flow of fuel to the engine; converting the time value into an angle value as a function of the rotational speed of the engine; and controlling the solenoid-valve-controlled fuel-metering system as a function of the angle value.
Claim 20
Independent Claim
82 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: determining a rotational speed of the engine; determining a time value indicative of one of a start of flow of fuel to the engine and an end of flow of fuel to the engine; converting the time value into an angle value as a function of the rotational speed of the engine; and controlling the solenoid-valve-controlled fuel-metering system as a function of the angle value.
Claim 21
Independent Claim
88 words
An apparatus for controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising: means for determining a rotational speed of the engine; and an electronic device for determining a time value indicative of one of a start of flow of fuel to the engine and an end of flow of fuel to the engine, for converting the time value into an angle value as a function of the rotational speed of the engine, and for controlling the solenoid-valve-controlled fuel-metering system ass a function of the angle value.
Claim 22
Independent Claim
88 words
An apparatus for controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising: means for determining a rotational speed of the engine; and an electronic device for determining a time value indicative of one of a start of flow of fuel to the engine and an end of flow of fuel to the engine, for converting the time value into an angle value as a function of the rotational speed of the engine, and for controlling the solenoid-valve-controlled fuel-metering system ass a function of the angle value.
Claim 23
Independent Claim
93 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: measuring a first rotational speed of the engine; measuring a second rotational speed of the engine; determining a time value indicative of an actual flow of fuel to the engine; determining a first angle value based upon the time value and the first rotational speed; determining a second angle value based upon the time value and the second rotational speed; and controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle values.
Claim 24
Independent Claim
93 words
A method of controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising the steps of: measuring a first rotational speed of the engine; measuring a second rotational speed of the engine; determining a time value indicative of an actual flow of fuel to the engine; determining a first angle value based upon the time value and the first rotational speed; determining a second angle value based upon the time value and the second rotational speed; and controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle values.
Claim 25
Dependent Claim
37 words
The method as recited in claim 17, wherein the time value is indicative of one of an actual start of flow of fuel to the engine and an actual end of flow of fuel to the engine.
Claim 26
Independent Claim
94 words
An apparatus for controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising means for measuring a first and second rotational speed of the engine; and a control unit for determining a time value indicative of an actual flow of fuel to the engine, for determining a first angle value based upon the time value and the first rotational speed, for determining a second angle value based upon the time value and the second rotational speed, and for controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle values.
Claim 27
Independent Claim
94 words
An apparatus for controlling a solenoid-valve-controlled fuel-metering system for an internal combustion engine, comprising means for measuring a first and second rotational speed of the engine; and a control unit for determining a time value indicative of an actual flow of fuel to the engine, for determining a first angle value based upon the time value and the first rotational speed, for determining a second angle value based upon the time value and the second rotational speed, and for controlling the solenoid-valve-controlled fuel-metering system as a function of the first and second angle values.
Claim 28
Dependent Claim
37 words
The apparatus as recited in claim 19, wherein the time value is indicative of one of an actual start of flow of fuel to the engine and an actual end of flow of fuel to the engine.
Claim 29
Dependent Claim
29 words
The apparatus as recited in claim 19, wherein the control unit further determines an angle value corresponding to the time value based upon the first and second angle values.
Claim 30
Dependent Claim
35 words
The apparatus as recited in claim 21, wherein the angle value is indicative of a position of an increment wheel coupled to a drive shaft, the drive shaft, in turn, being coupled to the engine.
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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) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |