US3596645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel feed devices for internal-combustion engines
Assignee: Societe Industrielle de Brevets et dEtudes SIBE
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Filing: 1969-12-09
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Granted: 1971-08-03
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Expires: 1989-12-09
Abstract
Abstract The overall duration of opening of an injection valve in the fuel feed is regulated by an auxiliary throttle member opening automatically arranged upstream of a main throttle member. The pressure of the fuel passing through the injection valve is regulated by a system sensitive to the suction existing in the space between the two throttle members. Correction means act by feeding air into the system so as to reduce the suction and can include a diaphragm-controlled return valve and/or a capsuledriven piston obturating a calibrated orifice to the atmosphere.
Inventors
- 👤 Andre Louis Mennesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/30; F02M69/36; F02M69/40; F02M51/00; F02M51/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
316 words
In a fuel feed device for internal-combustion engines, which comprise in the induction pipe, upstream of a main throttling member operated by the driver, an auxiliary throttling member which opens automatically and progressively as the rate of airflow in the said pipe increases; means for injecting liquid fuel under pressure into that portion of the induction pipe downstream of the main throttling member; and a metering system adapted to respond to the position of the auxiliary throttling member and so to regulate the rate of flow of the fuel injected that the richness of the fuel-air mixture entering the induction pipe is substantially constant, at least for certain running conditions of the engine, the said injection means being in the form of a source of fuel under pressure of which the delivery circuit, leading into the said portion of the induction pipe, is controlled by at least one valve operated by an electromagnet, the metering system comprising a member adapted to be rotated continuously and capable, by affecting energization of the electromagnet of causing opening of the valve during only a fraction of each of its rotation, this system being so arranged that it increases this fraction the further the auxiliary throttling member opens, and decreases this fraction the further the auxiliary throttling member closes, the said fuel source being arranged so that its delivery pressure is regulated by a system adapted to respond to the suction prevailing in the space defined in the induction pipe by the two main and auxiliary throttling members, the improvement that the device comprises correction means acting by introducing air into the said system in order to reduce the suction, with the result that these correction means can also vary said delivery pressure and consequently, for a given position of the auxiliary throttling member, correct the rate at which fuel is admitted to the induction pipe by the said valve.
Claim 2
Dependent Claim
316 words
In a fuel feed device for internal-combustion engines, which comprise in the induction pipe, upstream of a main throttling member operated by the driver, an auxiliary throttling member which opens automatically and progressively as the rate of airflow in the said pipe increases; means for injecting liquid fuel under pressure into that portion of the induction pipe downstream of the main throttling member; and a metering system adapted to respond to the position of the auxiliary throttling member and so to regulate the rate of flow of the fuel injected that the richness of the fuel-air mixture entering the induction pipe is substantially constant, at least for certain running conditions of the engine, the said injection means being in the form of a source of fuel under pressure of which the delivery circuit, leading into the said portion of the induction pipe, is controlled by at least one valve operated by an electromagnet, the metering system comprising a member adapted to be rotated continuously and capable, by affecting energization of the electromagnet of causing opening of the valve during only a fraction of each of its rotation, this system being so arranged that it increases this fraction the further the auxiliary throttling member opens, and decreases this fraction the further the auxiliary throttling member closes, the said fuel source being arranged so that its delivery pressure is regulated by a system adapted to respond to the suction prevailing in the space defined in the induction pipe by the two main and auxiliary throttling members, the improvement that the device comprises correction means acting by introducing air into the said system in order to reduce the suction, with the result that these correction means can also vary said delivery pressure and consequently, for a given position of the auxiliary throttling member, correct the rate at which fuel is admitted to the induction pipe by the said valve.
Claim 3
Dependent Claim
64 words
The improvement of claim 1, wherein the fuel source has an injection pump delivering in parallel to the or each injection valve and to a return pipe controlled by a return valve, said return valve being operated by a movable or deformable element which forms one wall of a chamber connected to the space defined in the induction pipe by the two throttling members.
Claim 4
Dependent Claim
45 words
The improvement of claim 1, wherein the correction means comprise an enclosed actuator adapted to respond to the suction prevailing in the induction pipe downstream of the main throttling member, said actuator controlling a calibrated orifice through which said correction means communicate with the atmosphere.
Claim 5
Dependent Claim
29 words
The improvement of claim 3, wherein the calibrated orifice is connected to a zone in the induction pipe, said zone being situated at the air intake of this pipe.
Claim 6
Dependent Claim
37 words
The improvement of claim 4, wherein the zone is so situated that it passes from upstream to downstream of the auxiliary throttling member when the latter passes from its minimally open position to a partially open position.
Claim 7
Dependent Claim
51 words
The improvement of claim 1, wherein the correction means comprise a capsule adapted to respond to the characteristics of any fluid capable of influencing operation of the device and by an obturator operated by said capsule and adapted to establish or prevent communication between the said correction means and the atmosphere.
Claim 8
Dependent Claim
17 words
The improvement of claim 6, wherein said communication is via the air intake of the inducTion pipe.
Claim 9
Dependent Claim
47 words
The improvement of claim 1, wherein the fuel source comprises an injection pump, and said pump is driven by an electric motor connected to the engine ignition circuit in such a way that the pump operates only when the ignition circuit of the internal-combustion engine is closed.
Claim 10
Dependent Claim
16 words
The improvement of claim 1, wherein said continuously rotated member is driven by the internal-combustion engine.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |