US3739760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enrichment fuel-air supply system
Assignee: Ford Motor Co
•
Filing: 1972-03-29
•
Granted: 1973-06-19
•
Expires: 1992-03-29
Abstract
Abstract An auxiliary fuel-air supply system for an internal combustion engine which supplements the fuel-air supply from the carburetor during engine warmup and acceleration. The response of the system depends upon the engine coolant temperature and the motion and position of the carburetor throttle plate. A valve governs the flow of this supplemental fuel-air mixture into the intake manifold.
Inventors
- 👤 W Charron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:53
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/04; F02M1/046; F02M7/00; F02M7/06; Y; Y10; Y10S; Y10S261/00; Y10S261/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
159 words
In an internal combustion engine including: a carburetor having a pivotable throttle plate and a lever displaceable with the throttle plate, an intake manifold, a source of fuel, a source of air, an enrichment fuel-air supply system supplementary to said carburetor, chamber means receiving said fuel and air for intermixing therein, valve means having a movable member regulating flow of fuel and air from said sources to said chamber means, conduit means interconnecting said chamber means and said intake manifold, linkage means interconnecting the movable element of said valve means to the lever displaceable with said throttle plate, said linkage means including a time delay mechanism which upon opening actuation of the throttle lever acts similarly to a solid link and which following actuation incrementally lengthens as a function of time permitting the movable valve element to return to its prior position without return movement of the throttle lever and plate to its position prior to the opening actuation.
Claim 2
Dependent Claim
159 words
In an internal combustion engine including: a carburetor having a pivotable throttle plate and a lever displaceable with the throttle plate, an intake manifold, a source of fuel, a source of air, an enrichment fuel-air supply system supplementary to said carburetor, chamber means receiving said fuel and air for intermixing therein, valve means having a movable member regulating flow of fuel and air from said sources to said chamber means, conduit means interconnecting said chamber means and said intake manifold, linkage means interconnecting the movable element of said valve means to the lever displaceable with said throttle plate, said linkage means including a time delay mechanism which upon opening actuation of the throttle lever acts similarly to a solid link and which following actuation incrementally lengthens as a function of time permitting the movable valve element to return to its prior position without return movement of the throttle lever and plate to its position prior to the opening actuation.
Claim 3
Dependent Claim
128 words
In an internal combustion engine including: a carburetor having a pivotable throttle plate and a lever displaceable with the throttle plate, an intake manifold, a source of fuel, a source of air, an enrichment fuel-air supply system supplementary to said carburetor, chamber means receiving fuel and air for intermixing therein, valve means having an element movable to increase and decrease flow of fuel and air from said sources to said chamber means, conduit means interconnecting said chamber means and said intake manifold, linkage means interconnecting the movable element of said valve means to the lever displaceable with said throttle plate, said linkage means including a vacuum decay component which progressively lengthens following throttle opening actuation to return the movable member of said valve means to its preactuation position.
Claim 4
Dependent Claim
128 words
In an internal combustion engine including: a carburetor having a pivotable throttle plate and a lever displaceable with the throttle plate, an intake manifold, a source of fuel, a source of air, an enrichment fuel-air supply system supplementary to said carburetor, chamber means receiving fuel and air for intermixing therein, valve means having an element movable to increase and decrease flow of fuel and air from said sources to said chamber means, conduit means interconnecting said chamber means and said intake manifold, linkage means interconnecting the movable element of said valve means to the lever displaceable with said throttle plate, said linkage means including a vacuum decay component which progressively lengthens following throttle opening actuation to return the movable member of said valve means to its preactuation position.
Claim 5
Dependent Claim
82 words
An enrichment fuel-air supply system according to claim 2, said vacuum decay component including a housing, a pair of movable elements forming a variable volume substantially sealed air chamber within the housing, check valve means closeable to prevent entry of air into said chamber and openable to permit escape of air from said chamber, an air bleed passage from the atmosphere to said chamber permitting limited entry of air into said chamber when the pressure within the chamber is less than atmospheric.
Claim 6
Dependent Claim
29 words
An enrichment fuel-air supply system according to claim 2, means to vary the position of the movable element of said valve means in response to changes in engine temperature.
Claim 7
Dependent Claim
29 words
An enrichment fuel-air supply system according to claim 3, means to vary the position of the movable element of said valve means in response to changes in engine temperature.
Claim 8
Dependent Claim
58 words
An enrichment fuel-air supply system according to claim 2, a thermostat sensing the coolant temperature of the engine, said thermostat including an element movable in response to changes in coolant temperatures, variable position abutment means limiting the range of displacement of the movable element of said valve means, said abutment means being connected to said movable thermostat element.
Claim 9
Dependent Claim
58 words
An enrichment fuel-air supply system according to claim 3, a thermostat sensing the coolant temperature of the engine, said thermostat including an element movable in response to changes in coolant temperatures, variable position abutment means limiting the range of displacement of the movable element of said valve means, said abutment means being connected to said movable thermostat element.
Claim 10
Dependent Claim
132 words
An enrichment fuel-air supply system according to claim 2, said vacuum decay component including a housing, a pair of flexible diaphragms forming a variable volume substantially sealed air chamber within said housing, first rod means secured to one of said diaphragms extending in a given direction, second rod means secured to the other of said diaphragm extending in the opposite direction, said vacuum decay component connected to the remainder of said linkage means by said rod means, a check valve being closeable to prevent entry of atmospheric air into said chamber and openable to permit escape of compressed air from said chamber, an air bleed passage from the atmosphere to said chamber permitted limited and controlled entry of air into said chamber when the pressure within said chamber is less than atmospheric.
Claim 11
Dependent Claim
132 words
An enrichment fuel-air supply system according to claim 4, said vacuum decay component including a housing, a pair of flexible diaphragms forming a variable volume substantially sealed air chamber within said housing, first rod means secured to one of said diaphragms extending in a given direction, second rod means secured to the other of said diaphragm extending in the opposite direction, said vacuum decay component connected to the remainder of said linkage means by said rod means, a check valve being closeable to prevent entry of atmospheric air into said chamber and openable to permit escape of compressed air from said chamber, an air bleed passage from the atmosphere to said chamber permitted limited and controlled entry of air into said chamber when the pressure within said chamber is less than atmospheric.
Claim 12
Dependent Claim
132 words
An enrichment fuel-air supply system according to claim 6, said vacuum decay component including a housing, a pair of flexible diaphragms forming a variable volume substantially sealed air chamber within said housing, first rod means secured to one of said diaphragms extending in a given direction, second rod means secured to the other of said diaphragm extending in the opposite direction, said vacuum decay component connected to the remainder of said linkage means by said rod means, a check valve being closeable to prevent entry of atmospheric air into said chamber and openable to permit escape of compressed air from said chamber, an air bleed passage from the atmosphere to said chamber permitted limited and controlled entry of air into said chamber when the pressure within said chamber is less than atmospheric.
Claim 13
Dependent Claim
18 words
An enrichment fuel-air supply system according to claim 10, said linkage means including a spring loadable in tension.
References Cited (Backward Citations)
US1958818A
Cited
US2075521A
Cited
US2361206A
Cited
US2495485A
Cited
US2914052A
Cited
US2969973A
Cited
US3596642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |