US3710771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection apparatus in an internal combustion engine
Assignee: Individual
•
Filing: 1971-07-30
•
Granted: 1973-01-16
•
Expires: 1991-07-30
Abstract
Abstract Fuel metering apparatus includes a variable venturi and an airfuel mixture ratio control system variable for a plurality of throttle settings.
Inventors
- 👤 V Cinquegrani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:50
CPC Classifications
F; F02; F02D; F02D9/00; F02B; F02B2275/00; F02B2275/14; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0261; F02D2700/0266; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/56
Claims Analysis
Total Claims: 55
Claim 1
Independent Claim
129 words
In an internal combustion engine, fuel injection apparatus comprising, in combination: a fuel supply; intake manifold means for providing a flow of air; means for sensing the flow of air in the intake manifold means; fuel conduit means extending from the fuel supply to the intake manifold means; fuel pump means for providing a variable flow of fuel from the fuel supply to the intake manifold means; orifice means for varying the flow of fuel to the intake manifold means; sensing means for sensing the flow of fuel; and control means coupled to said sensing means for sensing the flow of fuel and to the means for sensing the flow of air and to the fuel pump means to vary the flow of fuel from the fuel pump means.
Claim 2
Dependent Claim
129 words
In an internal combustion engine, fuel injection apparatus comprising, in combination: a fuel supply; intake manifold means for providing a flow of air; means for sensing the flow of air in the intake manifold means; fuel conduit means extending from the fuel supply to the intake manifold means; fuel pump means for providing a variable flow of fuel from the fuel supply to the intake manifold means; orifice means for varying the flow of fuel to the intake manifold means; sensing means for sensing the flow of fuel; and control means coupled to said sensing means for sensing the flow of fuel and to the means for sensing the flow of air and to the fuel pump means to vary the flow of fuel from the fuel pump means.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 in which the intake manifold means includes an air intake chamber for providing a source for the flow of air.
Claim 4
Dependent Claim
20 words
The apparatus of claim 2 in which the intake manifold means further includes venturi means adjacent the air intake chamber.
Claim 5
Dependent Claim
14 words
The apparatus of claim 3 in which the venturi means includes a venturi throat.
Claim 6
Dependent Claim
23 words
The apparatus of claim 4 in which the venturi means includes means for sensing pressure within the intake manifold at the venturi throat.
Claim 7
Dependent Claim
19 words
The apparatus of claim 5 in which the venturi means further includes a venturi piston at the venturi throat.
Claim 8
Dependent Claim
16 words
The apparatus of claim 6 in which the venturi piston is movable in said venturi throat.
Claim 9
Dependent Claim
31 words
The apparatus of claim 7 in which the venturi means further includes means responsive to changes in pressure at the intake manifold for moving the venturi piston in said venturi throat.
Claim 10
Dependent Claim
38 words
The apparatus of claim 8 in which the means for moving the venturi piston comprises a cylinder; a piston movable in said cylinder; and a piston rod fastened to and extending between said piston and the venturi piston.
Claim 11
Dependent Claim
21 words
The apparatus of claim 9 which includes the first means for sensing pressure at the intake manifold coupled to the cylinder.
Claim 12
Dependent Claim
39 words
The apparatus of claim 7 in which the intake manifold means further includes throttle means, including a throttle plate located and movable within said intake manifold means to further control the flow of air in said intake manifold means.
Claim 13
Dependent Claim
23 words
The apparatus of claim 11 in which the throttle means includes mechanical linkage connected to the throttle plate for moving the throttle plate.
Claim 14
Dependent Claim
31 words
The apparatus of claim 12 in which mechanical linkage connected to said throttle means is interconnected to the venturi piston for simultaneous movement of the throttle plate and the venturi piston.
Claim 15
Dependent Claim
32 words
The apparatus of claim 13 which includes means for removing fuel from said fuel flow to the intake manifold means in response to movement of the mechanical linkage of the throttle means.
Claim 16
Dependent Claim
54 words
The apparatus of claim 14 in which the means for removing fuel comprises: a cylinder connected to the fuel conduit means; a piston in said cylinder; and mechanical linkage connected to said piston and to said mechanical linkage of the throttle means for moving said piston in response to movement of said throttle means.
Claim 17
Dependent Claim
27 words
The apparatus of claim 13 in which orifice means includes an orifice and a needle valve movable in said orifice to control the flow of fuel therethrough.
Claim 18
Dependent Claim
39 words
The apparatus of claim 16 in which the orifice means further includes mechanical linkage interconnected between the needle valve and the mechanical linkage of the throttle means for providing simultaneous movement of the needle valve and the throttle plate.
Claim 19
Dependent Claim
36 words
The apparatus of claim 5 in which the orifice means includes housing means coupled to the fuel conduit means extending between said fuel supply and said manifold means, and an orifice movable within said housing means.
Claim 20
Dependent Claim
17 words
The apparatus of claim 18 in which the orifice means further includes means for moving said orifice.
Claim 21
Dependent Claim
50 words
The apparatus of claim 18 in which the means for moving said orifice includes: A housing; a diaphragm in said housing; a rod fastened to and extending between said diaphragm and said orifice; biasing means for biasing said diaphragm, and the rod and orifice fastened thereto, in a first direction.
Claim 22
Dependent Claim
30 words
The apparatus of claim 20 in which means for moving said orifice further includes means for biasing said diaphragm, and the rod and orifice fastened thereto, in a second direction.
Claim 23
Dependent Claim
24 words
The apparatus of claim 21 in which means for biasing the diaphragm in a second direction is responsive to pressure in the intake manifold.
Claim 24
Dependent Claim
17 words
The apparatus of claim 7 in which the orifice means includes a rod movable within the orifice.
Claim 25
Dependent Claim
17 words
The apparatus of claim 23 in which the rod movable within the orifice includes a tapered portion.
Claim 26
Dependent Claim
20 words
The apparatus of claim 24 in which the orifice means further includes means for moving the rod within the orifice.
Claim 27
Dependent Claim
29 words
The apparatus of claim 25 in which the means for moving the rod includes means coupled to the rod for movement responsive to the movement of the venturi piston.
Claim 28
Dependent Claim
64 words
The apparatus of claim 26 in which the means coupled to the rod responsive to movement of venturi piston comprises: a lever coupled to the rod; spring means biasing the rod in a first direction; a plate secured to the piston rod; and a plurality of adjustable members on said plate sequentially bearing against the lever in response to movement of the piston rod.
Claim 29
Dependent Claim
33 words
The apparatus of claim 27 in which the means for moving the rod further includes means fastened to the lever for moving the lever in a first direction and in a second direction.
Claim 30
Dependent Claim
58 words
The apparatus of claim 28 in which the means fastened to the lever for moving the lever in a first direction and in a second direction comprises: an expansible chamber device including a movable wall; linkage fastened to the movable wall of the expansible chamber and movable therewith; and fastening means pivotally securing the lever to the linkage.
Claim 31
Dependent Claim
47 words
The apparatus of claim 5 in which the sensing means for sensing the flow of fuel includes: chamber means; means for providing a flow of fuel to said chamber means from said fuel pump means; and means for sensing the flow of fuel to said chamber means.
Claim 32
Dependent Claim
68 words
The apparatus of claim 5 in which the sensing means for sensing the flow of fuel includes: a housing; a first expansible chamber in said housing; means for providing a flow of fuel from said fuel pump means to the first expansible chamber; a second expansible chamber in said housing; means associated with the second expansible chamber for sensing the flow of fuel in said first expansible chamber.
Claim 33
Dependent Claim
41 words
The apparatus of claim 30 in which means for sensing the flow of fuel to the chamber means comprises: a float in said chamber means; and radio frequency detector means for detecting the location of said float in said chamber means.
Claim 34
Dependent Claim
38 words
The apparatus of claim 30 in which the means for sensing the flow of fuel further comprises a float in said chamber means and photo cell means for detecting the location of the float in said chamber means.
Claim 35
Dependent Claim
49 words
The apparatus of claim 30 in which the means for sensing the flow of fuel to the chamber means further comprises means responsive to the flow of fuel for varying the size of the chamber means and means for detecting the variation in the size of the chamber means.
Claim 36
Dependent Claim
38 words
The apparatus of claim 33 in which the chamber means includes wall means defining a chamber, said chamber including an upper portion and a lower portion, and means for admitting fuel to the lower portion of the chamber.
Claim 37
Dependent Claim
73 words
The apparatus of claim 35 in which the means for detecting the location of the float comprises: a light source for providing light; light responsive means for producing an output in response to light from the light source; and skirt means on the float intermediate the light source and the light responsive means for interrupting lIght from the light source to the light responsive means in response to vertical movement of the float.
Claim 38
Dependent Claim
48 words
The apparatus of claim 30 in which the chamber means includes: a first and second chamber; a first float in the first chamber; a second float in the second chamber; and means for admitting fuel to said first and second chambers to move said first and second floats.
Claim 39
Dependent Claim
17 words
The apparatus of claim 37 in which the orifice means are intermediate the first and second chambers.
Claim 40
Dependent Claim
49 words
The apparatus of claim 38 in which the means for sensing pressure within the intake manifold at the venturi throat is connected to the second chamber, and the sensing means for sensing the flow of fuel includes means for admitting air at substantially atmospheric pressure to the first chamber.
Claim 41
Dependent Claim
46 words
The apparatus of claim 39 in which the sensing means for sensing the flow of fuel comprises a first sensing means for sensing the flow of fuel in said first chamber and a second sensing means for sensing the flow of fuel in said second chamber.
Claim 42
Dependent Claim
32 words
The apparatus of claim 40 in which the control means comprises a first control means coupled to the first sensing means and a second control means coupled to the second sensing means.
Claim 43
Dependent Claim
33 words
The apparatus of claim 41 in which the fuel pump means includes a first fuel pump coupled to said first control means and a second fuel pump coupled to said second control means.
Claim 44
Dependent Claim
35 words
The apparatus of claim 42 in which the sensing means comprises light responsive photo cell means responsive to the locations of the floats in the first and second chambers for sensing the flow of fuel.
Claim 45
Dependent Claim
41 words
The apparatus of claim 30 in which the chamber means comprises: a housing; and expansible chamber means in said housing for receiving a flow of fuel, and said expansible chamber means varying in size according to the flow of fuel thereto.
Claim 46
Dependent Claim
31 words
The apparatus of claim 44 in which the means for sensing the flow of fuel to the chamber means comprises means for detecting variations in the size of the chamber means.
Claim 47
Dependent Claim
61 words
The apparatus of claim 44 in which the means for detecting variations in the size of the chamber means comprises: a diaphragm within said housing adjacent said expansible chamber means and movable therewith; a shutter plate on said diaphragm and movable therewith; light responsive means adjacent the shutter plate for producing an output in response to movement of the shutter plate.
Claim 48
Dependent Claim
14 words
The apparatus of claim 46 in which the expansible chamber means comprises a bellows.
Claim 49
Dependent Claim
20 words
The apparatus of claim 46 in which the expansible chamber means comprises a cylinder and a piston in said cylinder.
Claim 50
Dependent Claim
40 words
The apparatus of claim 30 in which the chamber means comprises a pair of housings; expansible chamber means in each of said housings, and each of said expansible chamber means varying in size according to the flow of fuel thereto.
Claim 51
Dependent Claim
18 words
The apparatus of claim 49 in which the expansible chamber means comprises bellows in each of said housings.
Claim 52
Dependent Claim
27 words
The apparatus of claim 50 in which means for sensing pressure within the intake manifold at the venturi is connected to one of said pair of housings.
Claim 53
Dependent Claim
27 words
The apparatus of claim 50 in which the chamber means includes means for providing air at substantially atmospheric pressure to the other of said pair of housings.
Claim 54
Dependent Claim
34 words
The apparatus of claim 52 in which the means for providing air at substantially atmospheric pressure includes means for modulating the provided air with pressure sensed within the intake manifold at the venturi throat.
Claim 55
Dependent Claim
71 words
The apparatus of claim 53 in which the means for modulating the provided air includes: an orifice connected to the air at substantially atmospheric pressure and to the means for sensing pressure within the intake manifold at the venturi throat; a needle valve movable in the orifice; and an expandable bellows connected to the needle valve for moving said needle valve in said orifice in response to expansiOn of the bellows.
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |