Patent US4432228A successfully refreshed from Google Patents.
US4432228A
Expired / Lapsed
US
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Fuel injection arrangement
Assignee: Robert Bosch GmbH
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Filing: 1982-01-11
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Granted: 1984-02-21
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Expires: 2002-01-11
Abstract
Abstract A fuel injection arrangement for an internal combustion engine, has a control device for receiving an electrical signal corresponding to a quantity of applied fuel, comparing an actual value with a nominal value of the supplied fuel quantity, and producing a correcting signal for fuel supply, and also has a measuring element for measuring the quantity of the supplied fuel and producing the responding electrical signal, wherein the measuring element includes a quartz pressure measuring diaphragm producing the electrical signal by a piezoelectric effect on quartz because of a differential pressure on the measuring diaphragm.
Inventors
- 👤 Heinz Kuschmierz
- 👤 Wilhelm Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:45
CPC Classifications
F; F02; F02M; F02M55/00; F02D; F02D41/00; F02D41/02; F02D41/14; F02M63/00; G; G01; G01P; G01P5/00; G01P5/08; G01P5/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
A fuel injection control arrangement for an internal combustion engine, comprising means for receiving an electrical signal corresponding to a quantity of a supplied fuel, comparing an actual value with a nominal value of the supplied fuel quantity, and producing a correcting signal for fuel supply; and means for measuring the quantity of a supplied fuel and producing the corresponding electrical signal, said measuring means including a quartz pressure measuring diaphragm producing the corresponding electric signal by a piezoelectric effect on quartz because of a differential pressure on said measuring diaphragm, said quartz pressure measuring diaphragm including a monocrystal quartz plate with a diaphragm opening of an identical diameter over its entire length and with two outer surfaces exposed to the differential pressure, and electrode means provided on said outer surfaces.
Claim 2
Dependent Claim
131 words
A fuel injection control arrangement for an internal combustion engine, comprising means for receiving an electrical signal corresponding to a quantity of a supplied fuel, comparing an actual value with a nominal value of the supplied fuel quantity, and producing a correcting signal for fuel supply; and means for measuring the quantity of a supplied fuel and producing the corresponding electrical signal, said measuring means including a quartz pressure measuring diaphragm producing the corresponding electric signal by a piezoelectric effect on quartz because of a differential pressure on said measuring diaphragm, said quartz pressure measuring diaphragm including a monocrystal quartz plate with a diaphragm opening of an identical diameter over its entire length and with two outer surfaces exposed to the differential pressure, and electrode means provided on said outer surfaces.
Claim 3
Dependent Claim
31 words
A fuel injection control arrangement as defined in claim 1, wherein said electrode means are metallic electrodes arranged on said outer surfaces of said quartz plate of said quartz measuring diaphragm.
Claim 4
Dependent Claim
58 words
A fuel injection control arrangement as defined in claim 2; and further comprising means for compensating fuel acceleration causes by said measuring diaphragm and including a compensating quartz having a mass identical to that of said quartz plate of said measuring diaphragm and two outer surfaces, and further electrodes arranged on said outer surfaces of said compensating quartz.
Claim 5
Dependent Claim
102 words
A fuel injection control arrangement as defined in claim 3, wherein said receiving, comparing and producing means includes an electric amplifying element arranged to receive said electrical signal from said measuring means, a root-taking element connected to said amplifying element, an integrating element connected to said root-taking element and a comparing element connected to said integrating element for comparing the actual and nominal values of the supplied fuel quantity and together forming parts of an electronic control device, said electrodes of said quartz plate and said compensating quartz including proximal electrodes connected with one another and distal electrodes connected with said amplifier.
Claim 6
Dependent Claim
78 words
A fuel injection control arrangement as defined in claim 1, wherein said receiving, comparing and producing means includes an electric amplifying element arranged to receive said electrical signal from said measuring means, a root-taking element connected to said amplifying element, an integrating element connected to said root-taking element and a comparing element connected to said integrating element for comparing the actual and nominal values of the supplied fuel quantity and together forming parts of an electronic control device.
Claim 7
Dependent Claim
21 words
A fuel injection control arrangement as defined in claim 5, wherein said electric amplifying element and said integrating element are readjustable.
Claim 8
Dependent Claim
31 words
A fuel injection control arrangement as defined in claim 1; and further comprising means for preventing fuel overflow not through said diaphragm opening of said quartz plate of said measuring diaphragm.
Claim 9
Dependent Claim
26 words
A fuel injection control arrangement as defined in claim 7, wherein said preventing means includes sealing rings arranged on said quartz plate of said measuring diaphragm.
Claim 10
Dependent Claim
37 words
A fuel injection control arrangement as defined in claim 8; and further comprising a housing accommodating said measuring diaphragm, said sealing rings being arranged between each of said outer surfaces of said quartz plate and said housing.
Claim 11
Dependent Claim
36 words
A fuel injection control arrangement as defined in claim 1; and further comprising an injection nozzle of an injection pump, said quartz pressure measuring diaphragm being arranged prior to said injection nozzle of said injection pump.
Claim 12
Dependent Claim
41 words
A fuel injection control arrangement as defined in claim 10, wherein said injection pump is a distributing injection pump provided with said injection nozzle, said quartz pressure measuring diaphragm being arranged prior to said injection nozzle of said distributing injection pump.
Claim 13
Dependent Claim
41 words
A fuel injection control arrangement as defined in claim 1; and further comprising an injection pump having a high pressure supply piston and a supply conduit leading to the latter, said quartz pressure measuring diaphragm being arranged in said supply conduit.
References Cited (Backward Citations)
US4046004A
Cited
US4361050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |