Patent US4805573A successfully refreshed from Google Patents.
US4805573A
Expired / Lapsed
US
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Engine with variable area intake passages
Assignee: Motors Liquidation Co
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Filing: 1988-02-22
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Granted: 1989-02-21
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Expires: 2008-02-22
Abstract
Abstract An internal combustion engine or the like is provided with an induction system having intake runners of conical or equivalent configuration in which flow control cones or elements are axially moved to vary the effective cross-sectional area of the runner passages and thereby control the flow velocity and inertia of the incoming charge to improve various operating parameters such as combustion and charging efficiency.
Inventors
- 👤 Glen R. Macfarlane
- 👤 Jordan R. Lee
- 👤 Ross R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:21
CPC Classifications
F; F02; F02B; F02B27/00; F02B27/02; F02B27/0205; F02B27/0226; F02B27/0268; F02D; F02D9/00; F02D9/08; F02D9/12; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
An internal combustion engine comprising, in combination, a cylinder intake port, means defining an intake passage having wall portions with consistently converging inner surfaces connecting with the intake port, and a flow control element in the passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, the element being movable along the direction of fluid flow toward and away from the port to vary the flow area and thereby the velocity and inertia of fluid flow into the intake port.
Claim 2
Dependent Claim
85 words
An internal combustion engine comprising, in combination, a cylinder intake port, means defining an intake passage having wall portions with consistently converging inner surfaces connecting with the intake port, and a flow control element in the passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, the element being movable along the direction of fluid flow toward and away from the port to vary the flow area and thereby the velocity and inertia of fluid flow into the intake port.
Claim 3
Dependent Claim
101 words
An internal combustion engine comprising, in combination, a cylinder intake port having an opening controlled by a poppet valve, means defining an intake passage having wall portions with consistently converging inner surfaces connecting with the intake port upstream of the valve, and a flow control element in the passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, the element being movable along the direction of fluid flow to and away from a point near the poppet valve to vary the flow area and thereby the velocity and inertia of fluid flow into the intake port.
Claim 4
Dependent Claim
101 words
An internal combustion engine comprising, in combination, a cylinder intake port having an opening controlled by a poppet valve, means defining an intake passage having wall portions with consistently converging inner surfaces connecting with the intake port upstream of the valve, and a flow control element in the passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, the element being movable along the direction of fluid flow to and away from a point near the poppet valve to vary the flow area and thereby the velocity and inertia of fluid flow into the intake port.
Claim 5
Dependent Claim
22 words
An engine as in claim 2 wherein the opposing surfaces of the passage and the control element have circular lateral cross sections.
Claim 6
Dependent Claim
19 words
An engine as in claim 3 wherein the opposing surfaces of the passage and the control element are frusto-conical.
Claim 7
Dependent Claim
22 words
An engine as in claim 2 wherein the opposing surfaces of the passage and the control element have oval lateral cross sections.
Claim 8
Dependent Claim
22 words
An engine as in claim 2 wherein the opposing surfaces of the passage and the control element have rectangular lateral cross sections.
Claim 9
Dependent Claim
22 words
An engine as in claim 6 wherein the opposing surfaces of the passage and the control element define frustums of a pyramid.
Claim 10
Dependent Claim
20 words
An engine as in claim 6 wherein the opposing surfaces of the passage and the control element are wedge shaped.
Claim 11
Dependent Claim
96 words
An internal combustion engine comprising, in combination, a cylinder intake port, means defining an intake passage having wall portions with consistently converging inner surfaces connecting with the intake port, a flow control element in the passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, the element being movable along the direction of fluid flow toward and away from the port to vary the flow area and thereby the velocity and inertia of fluid flow into the intake port, and means for moving the control element to control the fluid flow.
Claim 12
Dependent Claim
96 words
An internal combustion engine comprising, in combination, a cylinder intake port, means defining an intake passage having wall portions with consistently converging inner surfaces connecting with the intake port, a flow control element in the passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, the element being movable along the direction of fluid flow toward and away from the port to vary the flow area and thereby the velocity and inertia of fluid flow into the intake port, and means for moving the control element to control the fluid flow.
Claim 13
Dependent Claim
91 words
An internal combustion engine comprising, in combination, a plurality of cylinder intake ports, means defining intake passages having wall portions with consistently converging inner surfaces each connecting with at least one of the intake ports, and a flow control element in each passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, each element being movable along the direction of fluid flow toward and away from its port to vary the flow area and thereby the velocity and inertia of fluid flow into the intake ports.
Claim 14
Dependent Claim
91 words
An internal combustion engine comprising, in combination, a plurality of cylinder intake ports, means defining intake passages having wall portions with consistently converging inner surfaces each connecting with at least one of the intake ports, and a flow control element in each passage and having outer surface portions generally parallel with and opposing the converging inner surfaces, each element being movable along the direction of fluid flow toward and away from its port to vary the flow area and thereby the velocity and inertia of fluid flow into the intake ports.
Claim 15
Dependent Claim
15 words
An engine as in claim 10 wherein the passage defining means includes an intake manifold.
Claim 16
Dependent Claim
33 words
An engine as in claim 11 wherein the intake manifold carries the flow control elements and further includes means for moving the control elements in unison to similarly control flow in the passages.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |