US3782339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air meter switching arrangement for an electric fuel injection system
Assignee: Robert Bosch GmbH
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Filing: 1971-07-20
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Granted: 1974-01-01
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Expires: 1991-07-20
Abstract
Abstract An electromagnet, energized only when the engine operates at full load and high r.p.m., attracts the static plate of the air meter out of the air path of the engine intake manifold. A switch, operated by the static plate only when the latter is pivoted to at least the idling position, is associated with a circuit that insures that the fuel pump operates only when the engine is turning over.
Inventors
- 👤 H Scholl
- 👤 H Mauch
- 👤 N Rittmannsberger
- 👤 W Soll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:42
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/18; F02M; F02M69/00; F02B; F02B1/00; F02B1/02; F02B1/04; F02M2700/00; F02M2700/43; F02M2700/4397
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
181 words
In combination with an internal combustion engine having an air intakE passage and a throttle valve in said intake passage, an arrangement comprising an air flow sensing member located in said air intake passage in the path of inflowing air and mounted for displacement by the inflowing air to an extent indicative of the air inflow rate; transducer means cooperating with said sensing member and operative for generating an electrical signal indicative of the displacement of said member and thereby indicative of the air inflow rate; fuel-injection means comprising fuel-quantity selecting means connected to said transducer means and responsive to said electrical signal and operative for injecting into a cylinder of said internal combustion engine an amount of fuel dependent upon said electrical signal; and overriding means for automatically moving said sensing member out of the path of inflowing air independently of the prevailing air inflow rate when said throttle valve is opened to a predetermined extent, so as to maximize the flow cross-section of the air intake passage and maximize the quantity of injected fuel for purposes of quick acceleration.
Claim 2
Dependent Claim
181 words
In combination with an internal combustion engine having an air intakE passage and a throttle valve in said intake passage, an arrangement comprising an air flow sensing member located in said air intake passage in the path of inflowing air and mounted for displacement by the inflowing air to an extent indicative of the air inflow rate; transducer means cooperating with said sensing member and operative for generating an electrical signal indicative of the displacement of said member and thereby indicative of the air inflow rate; fuel-injection means comprising fuel-quantity selecting means connected to said transducer means and responsive to said electrical signal and operative for injecting into a cylinder of said internal combustion engine an amount of fuel dependent upon said electrical signal; and overriding means for automatically moving said sensing member out of the path of inflowing air independently of the prevailing air inflow rate when said throttle valve is opened to a predetermined extent, so as to maximize the flow cross-section of the air intake passage and maximize the quantity of injected fuel for purposes of quick acceleration.
Claim 3
Dependent Claim
157 words
In combination with an internal combustion engine having an air intake passage and a throttle valve in said intake passage, an arrangement comprising an air flow sensing member located in said air intake passage in the path of inflowing air and mounted for displacement by the inflowing air to an extent indicative of the air inflow rate; transducer means cooperating with said sensing member and operative for generating an electrical signal indicative of the displacement of said member and thereby indicative of the air inflow rate; and overriding means for automatically moving said sensing member out of the path of inflowing air independently of the prevailing air inflow rate when said throttle valve is opened to a predetermined extent to maximize the flow cross-section of the air intake passage for purposes of quick acceleration, said overriding means comprising an electromagnet generating a magnetic force effective for moving said sensing member out of the path of inflowing air.
Claim 4
Dependent Claim
157 words
In combination with an internal combustion engine having an air intake passage and a throttle valve in said intake passage, an arrangement comprising an air flow sensing member located in said air intake passage in the path of inflowing air and mounted for displacement by the inflowing air to an extent indicative of the air inflow rate; transducer means cooperating with said sensing member and operative for generating an electrical signal indicative of the displacement of said member and thereby indicative of the air inflow rate; and overriding means for automatically moving said sensing member out of the path of inflowing air independently of the prevailing air inflow rate when said throttle valve is opened to a predetermined extent to maximize the flow cross-section of the air intake passage for purposes of quick acceleration, said overriding means comprising an electromagnet generating a magnetic force effective for moving said sensing member out of the path of inflowing air.
Claim 5
Dependent Claim
18 words
The arrangement defined in claim 2, wherein said sensing member is at least in part of magnetizable material.
Claim 6
Dependent Claim
36 words
The arrangement defined in claim 3, wherein said electromagnet is located in said air intake passage in proximity to said sensing member when the latter is in the displaced position thereof corresponding to maximum air inflow.
Claim 7
Dependent Claim
49 words
The arrangement defined in claim 3, wherein said overriding means is operative for moving said sensing member out of the path of inflowing air independently of the prevailing air inflow rate when said throttle valve is opened to a predetermined extent providing the engine speed exceeds a predetermined value.
Claim 8
Dependent Claim
85 words
The arrangement defined in claim 5, wherein said overriding means comprises an electromagnet generating a magnetic force effective for moving said sensing member out of the path of inflowing air, said electromagnet having a current path including a first switch and a second switch and being energized only when both said switches are closed, means for closing said first switch when said throttle valve is opened to said predetermined extent and means for closing said second switch when the engine speed exceeds said predetermined value.
Claim 9
Dependent Claim
168 words
In combination with an internal combustion engine having an air intake passage and a throttle valve in said intake passage, an arrangement comprising an air flow sensing member located in said air intake passage in the path of inflowing air and mounted for displacement by the inflowing air to an extent indicative of the air inflow rate; transducer means cooperating with said sensing member and operative for generating an electrical signal indicative of the displacement of said member and thereby indicative of the air inflow rate; and overriding means for moving said sensing member out of the path of inflowing air independently of the prevailing air inflow rate when said throttle valve is opened to a predetermined extent, so as to maximize the flow cross-section of the air intake passage for purposes of quick acceleration; a fuel pump; and means for initiating operation of said fuel pump when said sensing member assumes a position indicating that the air inflow rate has reached at least a predetermined minimum value.
Claim 10
Dependent Claim
168 words
In combination with an internal combustion engine having an air intake passage and a throttle valve in said intake passage, an arrangement comprising an air flow sensing member located in said air intake passage in the path of inflowing air and mounted for displacement by the inflowing air to an extent indicative of the air inflow rate; transducer means cooperating with said sensing member and operative for generating an electrical signal indicative of the displacement of said member and thereby indicative of the air inflow rate; and overriding means for moving said sensing member out of the path of inflowing air independently of the prevailing air inflow rate when said throttle valve is opened to a predetermined extent, so as to maximize the flow cross-section of the air intake passage for purposes of quick acceleration; a fuel pump; and means for initiating operation of said fuel pump when said sensing member assumes a position indicating that the air inflow rate has reached at least a predetermined minimum value.
Claim 11
Dependent Claim
30 words
The arrangement defined in claim 7, and further comprising a starter motor; and means for automatically initiating operation of said fuel pump in response to operation of said starter motor.
Claim 12
Dependent Claim
66 words
The arrangement defined in claim 8, wherein said fuel pump is provided with an electric drive motor having a current path and an electromagnetic relay comprising a motor switch in said current path; and a further switch connected in series with the winding of said relay to carry energizing current for the same and operated by said sensing member when the latter assumes a predetermined position.
Claim 13
Dependent Claim
24 words
The arrangement defined in claim 9, and further including a starting switch connected to said starter motor for carrying energizing current for the latter.
Claim 14
Dependent Claim
37 words
The arrangement defined in claim 10; and further including a diode connected between one end of said winding and said starting switch and another diode connected between said one end of said winding and said further switch.
Claim 15
Dependent Claim
41 words
The arrangement defined in claim 10, wherein said further switch is automatically closed when said sensing member assumes a position indicative of the absence of air inflow, and wherein said electromagnetic relay when energized is operative for opening said motor switch.
Claim 16
Dependent Claim
36 words
The arrangement defined in claim 12, wherein one end of the winding of said electromagnetic relay is connected to said further switch and wherein the other end of said winding is connected to said starting switch.
Claim 17
Dependent Claim
69 words
The arrangement defined in claim 13; further including an ignition switch connected to a source of current and to the ignition system of the engine; a master relay having at least first and second make contacts, the first make contact being connected in series with said drive motor and the second make contact being connected in series with said winding of said electromagnetic relay and with said further switch.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |