US3595211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine air intake control means
Assignee: Ford Motor Co
•
Filing: 1970-07-20
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Granted: 1971-07-27
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Expires: 1990-07-20
Abstract
Abstract An internal combustion engine for a motor vehicle having air intake control means that accurately control the volume of air included in the air-fuel combustion mixture. The intake of ambient air through the engine carburetor is metered and fuel introduced downstream in direct proportion. A portion of this metered air is directed to the crankcase for ventilation purposes prior to introduction of fuel and is exhausted from the lubrication circuit into the engine intake manifold. The lubrication circuit of the engine otherwise is sealed against the entry of ambient air.
Inventors
- 👤 Wayne M Brehob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:06
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/12; F02M7/22; F02M25/00; F02M25/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
In an internal combustion engine having a fluid lubricant circuit, a charge-forming device including an induction passage for supplying a fuel-air mixture to engine combustion chambers, air intake means to the induction passage, an air-metering means in the induction passage movable in response to airflow admitted from the air intake means, and fuel-metering means introducing fuel to the induction passage downstream of the air-metering means and being responsive to movements of the air-metering means to admit fuel in proportion to the airflow therethrough, first fluid-conduit means connecting the induction passage at a point intermediate the air-metering means and the fuel-metering means with the engine lubricant circuit for supplying air to the lubricant circuit, the lubricant circuit otherwise being sealed against the entry of ambient air, and second fluid-conduit means interconnecting the lubricant circuit and the induction passage at a point downstream of the airmetering means and cooperating with said first conduit means to provide ventilation to said lubricant circuit.
Claim 2
Dependent Claim
159 words
In an internal combustion engine having a fluid lubricant circuit, a charge-forming device including an induction passage for supplying a fuel-air mixture to engine combustion chambers, air intake means to the induction passage, an air-metering means in the induction passage movable in response to airflow admitted from the air intake means, and fuel-metering means introducing fuel to the induction passage downstream of the air-metering means and being responsive to movements of the air-metering means to admit fuel in proportion to the airflow therethrough, first fluid-conduit means connecting the induction passage at a point intermediate the air-metering means and the fuel-metering means with the engine lubricant circuit for supplying air to the lubricant circuit, the lubricant circuit otherwise being sealed against the entry of ambient air, and second fluid-conduit means interconnecting the lubricant circuit and the induction passage at a point downstream of the airmetering means and cooperating with said first conduit means to provide ventilation to said lubricant circuit.
Claim 3
Dependent Claim
31 words
The combination of claim 1, wherein the second fluid conduit means includes a one-way valve preventing fluid flow from the induction passage to the lubricant circuit through the second circuit means.
Claim 4
Dependent Claim
85 words
In an internal combustion engine having a fluid lubricant circuit, a charge-forming means including an induction passage, air-metering means in the induction passage responsive to airflow therethrough, and fuel-metering means responsive to the air-metering means introducing fuel to the induction passage downstream of the air-metering means, fluid-conduit means connecting the induction passage at a point intermediate the air-metering means and the fuel-metering means with the engine lubricant circuit for supplying air to the circuit, the circuit otherwise being sealed against the entry of ambient air.
Claim 5
Dependent Claim
85 words
In an internal combustion engine having a fluid lubricant circuit, a charge-forming means including an induction passage, air-metering means in the induction passage responsive to airflow therethrough, and fuel-metering means responsive to the air-metering means introducing fuel to the induction passage downstream of the air-metering means, fluid-conduit means connecting the induction passage at a point intermediate the air-metering means and the fuel-metering means with the engine lubricant circuit for supplying air to the circuit, the circuit otherwise being sealed against the entry of ambient air.
Claim 6
Dependent Claim
23 words
The combination of claim 3, further including a lubricant circuit venting conduit means interconnecting the lubricant circuit and a source of engine vacuum.
Claim 7
Dependent Claim
34 words
The combination of claim 3, further comprising lubricant circuit venting means permitting fluid flow from the lubricant circuit and including a one-way valve prohibiting fluid flow into the lubricant circuit through the venting means.
References Cited (Backward Citations)
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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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |