US4299125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air quantity metering apparatus
Assignee: Robert Bosch GmbH
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Filing: 1980-08-12
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Granted: 1981-11-10
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Expires: 2000-08-12
Abstract
Abstract An apparatus is proposed for metering air quantity, particularly for metering induction air quantity in internal combustion engines, which has a temperature-dependent resistor disposed within an air stream, the temperature and/or resistance value of which is regulated in accordance with the air quantity, and with the control value providing a standard for induction air quantity. The temperature-dependent resistor is embodied as a heating wire and is stretched in a V-shape on a carrier member, whereby the temperature coefficient of the carrier member and that of the heating wire are compatible with each other. The stretching of the wire is accomplished with the aid of support elements which are fixed within the carrier member. The heating wire has each end affixed at a support point, while it is guided only loosely over an intermediate support element.
Inventors
- 👤 Peter Romann
- 👤 Udo Hafner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F1/696; G01F1/698; G01F1/6983; G01F1/684; G01F1/688; G01F1/69
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
170 words
An air quantity metering apparatus and particularly for metering the induction air quantity in internal combustion engines comprising a temperature-dependent resistor element disposed generally transversely within an air stream, said temperature-dependent resistor element having its temperature and/or resistance being regulated in accordance with the air quantity for indicating a control value, and with the control value providing a standard for the air quantity, said temperature-dependent resistor element being embodied as a continuous heating wire having end portions terminating at and being stretched on respective sensor carrier members, said carrier members and said heating wire each having heat expansion coefficients adapted to be compatible to each other, said carrier members including at least three hook-like support elements for guiding said heating wire, said end portions terminating and affixed to a pair of said hook-like support elements, said heating wire being supported loosely substantially medially of its affixed end portions on at least one of said hook-like support elements and said heating wire having conducting tensile or compressive strains being essentially eliminated.
Claim 2
Dependent Claim
170 words
An air quantity metering apparatus and particularly for metering the induction air quantity in internal combustion engines comprising a temperature-dependent resistor element disposed generally transversely within an air stream, said temperature-dependent resistor element having its temperature and/or resistance being regulated in accordance with the air quantity for indicating a control value, and with the control value providing a standard for the air quantity, said temperature-dependent resistor element being embodied as a continuous heating wire having end portions terminating at and being stretched on respective sensor carrier members, said carrier members and said heating wire each having heat expansion coefficients adapted to be compatible to each other, said carrier members including at least three hook-like support elements for guiding said heating wire, said end portions terminating and affixed to a pair of said hook-like support elements, said heating wire being supported loosely substantially medially of its affixed end portions on at least one of said hook-like support elements and said heating wire having conducting tensile or compressive strains being essentially eliminated.
Claim 3
Dependent Claim
25 words
An apparatus in accordance with claim 1, further wherein said heating wire is stretched on said carrier members to form the shape of a V.
Claim 4
Dependent Claim
35 words
An apparatus in accordance with claim 1, further wherein said heating wire is supported intermediate its length on said at least one of said hook-like support elements that consists at least partially of insulating material.
Claim 5
Dependent Claim
36 words
An apparatus in accordance with claim 1, further wherein said heating wire is supported intermediate its affixed end portions on said at least one of said hook-like support elements consisting at least partially of insulating material.
Claim 6
Dependent Claim
40 words
An apparatus in accordance with claim 1, further wherein said carrier members include planar wall portions and said heating wire is supported on said at least one of said hook-like support elements projecting beyond either of said planar wall portions.
Claim 7
Dependent Claim
14 words
An apparatus in accordance with claim 1, further wherein said heating wire is platinum.
Claim 8
Dependent Claim
34 words
An apparatus in accordance with claim 6, further wherein said platinum heating wire is supported by said at least one of each hook-like support elements affixed to said carrier members by an insulation means.
Claim 9
Dependent Claim
17 words
An apparatus in accordance with claim 1, further wherein said carrier members consists of a nickel-iron alloy.
Claim 10
Dependent Claim
16 words
An apparatus in accordance with claim 1, further wherein said carrier members is a glass body.
Claim 11
Dependent Claim
18 words
An apparatus in accordance with claim 9, further wherein said support elements are fused into said glass body.
Claim 12
Dependent Claim
14 words
An apparatus in accordance with claim 1, further wherein said carrier members is platinum-glass.
Claim 13
Dependent Claim
30 words
An apparatus in accordance with claim 1, wherein a sensor member supports said carrier members and said sensor member is subjected to flow through it again in an axial direction.
Claim 14
Dependent Claim
14 words
An apparatus in accordance with claim 12, wherein said sensor member is a ring.
Claim 15
Dependent Claim
44 words
An apparatus in accordance with claim 12, wherein the heating wire is disposed at angles between adjacent segments for providing a more efficient detection of said air flow by way of a cross-section thereof, and the heating wire segments do not influence one another.
Claim 16
Dependent Claim
20 words
An apparatus in accordance with claim 1, wherein said heating wire forms angles between adjacent segments of respective carrier members.
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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |