Patent US3646914A successfully refreshed from Google Patents.
US3646914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel feed devices for internal combustion engines
Assignee: Societe Industrielle de Brevets et dEtudes SIBE
•
Filing: 1970-02-19
•
Granted: 1972-03-07
•
Expires: 1990-02-19
Abstract
Abstract Liquid fuel is injected under pressure into the induction pipe downstream of the main throttle valve. The fuel flow is metered to the injection orifice by a valve actuated by an electromagnet according to the airflow in the induction pipe. The injection orifice is aligned with an auxiliary orifice in an air chamber at constant pressure. The airflow to the chamber is carried close to the electromagnet so as to cool it.
Inventors
- 👤 Andre Louis Mennesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:42
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0667; F02M51/005; F02M51/0614; F02M51/08; F02M53/00; F02M53/04; F02M53/08; F02M2200/00; F02M2200/50; F02M2200/507
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
In an injection device, for internal combustion engines, comprising a source of liquid fuel under pressure connected to an injection orifice communicating with a zone of the induction pipe situated downstream of the main throttle member of said pipe and a metering system adapted, by acting on the energization of an electromagnet which actuates a valve cooperating with said injection orifice, to modify the flow of injected fuel according to the airflow passing in said pipe, said injection orifice being aligned with an auxiliary orifice which opens into said zone of the induction pipe and the space included between the two orifices forming a chamber aerated at a substantially constant pressure, the improvement comprising air circuit means bringing the air to said chamber and defining a space around and close to the electromagnet, so that the airflow in said air circuit towards said zone of the induction pipe contributes towards the cooling of the electromagnet.
Claim 2
Dependent Claim
155 words
In an injection device, for internal combustion engines, comprising a source of liquid fuel under pressure connected to an injection orifice communicating with a zone of the induction pipe situated downstream of the main throttle member of said pipe and a metering system adapted, by acting on the energization of an electromagnet which actuates a valve cooperating with said injection orifice, to modify the flow of injected fuel according to the airflow passing in said pipe, said injection orifice being aligned with an auxiliary orifice which opens into said zone of the induction pipe and the space included between the two orifices forming a chamber aerated at a substantially constant pressure, the improvement comprising air circuit means bringing the air to said chamber and defining a space around and close to the electromagnet, so that the airflow in said air circuit towards said zone of the induction pipe contributes towards the cooling of the electromagnet.
Claim 3
Dependent Claim
53 words
An injection device according to claim 1, wherein said electromagnet, which is of annular shape, is traversed axially by the fuel passage and is arranged with radial play inside an injector body, wherein said air circuit means defines an annular space left free around the electromagnet to form part of said air circuit.
Claim 4
Dependent Claim
97 words
An injection device according to claim 1, wherein said metering system comprises a member driven in continuous rotary movement and capable, by acting on the energization of the electromagnet, of determining, over a fraction only of each of its turns, the opening of said valve, said system being arranged in such fashion that it increases said fraction in proportion as the opening increases of an auxiliary throttle member arranged in said induction pipe upstream of said main throttle member and adapted to be opened automatically and progressively in proportion as the airflow in said induction pipe increases.
Claim 5
Dependent Claim
97 words
An injection device according to claim 2, wherein said metering system comprises a member driven in continuous rotary movement and capable, by acting on the energization of the electromagnet, of determining, over a fraction only of each of its turns, the opening of said valve, said system being arranged in such fashion that it increases said fraction in proportion as the opening increases of an auxiliary throttle member arranged in said induction pipe upstream of said main throttle member and adapted to be opened automatically and progressively in proportion as the airflow in said induction pipe increases.
Claim 6
Dependent Claim
48 words
An injection device according to claim 3, wheRein said air circuit means, upstream of it, is connected to the zone of the induction pipe situated between the main throttle member and the auxiliary throttle member, at least for positions of said auxiliary throttle member corresponding to slight airflows.
Claim 7
Dependent Claim
48 words
An injection device according to claim 4, wherein said air circuit means, upstream of it, is connected to the zone of the induction pipe situated between the main throttle member and the auxiliary throttle member, at least for positions of said auxiliary throttle member corresponding to slight airflows.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |