US5249557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection system for two cycle engine
Assignee: Yamaha Marine Co Ltd
•
Filing: 1992-02-05
•
Granted: 1993-10-05
•
Expires: 2012-02-05
Abstract
Abstract A fuel injection system for engines that employs a fuel injector that sprays into a chamber to which compressed air is delivered and which chamber communicates with the combustion chamber through a port that is opened and closed by the reciprocation of the piston if applied to a reciprocating engine. The source of compressed air may either be an air compressor or a crankcase chamber of the engine and the air compressor and/or crankcase chamber may also provide scavenging air for the engine. A variety of port arrangements are disclosed which include either single ports or a plurality of ports either circumferentially or axially spaced from each other and disposed between either the scavenge ports and exhaust ports or around a scavenge port or an exhaust port.
Inventors
- 👤 Masahiko Katoh
- 👤 Masanori Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:57
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/042; F02M69/045; F01; F01L; F01L3/00; F01L3/20; F01L3/205; F02B; F02B25/00; F02B25/14; F02B33/00; F02B33/02; F02B33/04; F02B33/32; F02B33/34; F02B33/36; F02B33/38; F02B33/44; F02M69/08; F02M69/10; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/12; F02B2075/125; F02B61/00; F02B61/04; F02B61/045; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 104
Claim 1
Independent Claim
112 words
A fuel injection system for an internal combustion engine having a variable volume combustion chamber defined by a pair of relatively moveable components, a nozzle port extending through one of said components and opened and closed only by the relative movement of said components, a conduit having a cross section flow area substantially greater than said nozzle port formed at least in part by said one component and extending to said nozzle port from externally of said combustion chamber, means for delivering a pressurized gas to said conduit at least during a portion of the time when said nozzle port is opened, and a fuel injector for injecting fuel into said conduit.
Claim 2
Dependent Claim
112 words
A fuel injection system for an internal combustion engine having a variable volume combustion chamber defined by a pair of relatively moveable components, a nozzle port extending through one of said components and opened and closed only by the relative movement of said components, a conduit having a cross section flow area substantially greater than said nozzle port formed at least in part by said one component and extending to said nozzle port from externally of said combustion chamber, means for delivering a pressurized gas to said conduit at least during a portion of the time when said nozzle port is opened, and a fuel injector for injecting fuel into said conduit.
Claim 3
Dependent Claim
33 words
A fuel injection system as set forth in claim 1 wherein the nozzle port is formed by an opening in the wall of the member which defines a portion of the combustion chamber.
Claim 4
Dependent Claim
25 words
A fuel injection system as set forth in claim 2 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the conduit.
Claim 5
Dependent Claim
29 words
A fuel injection system as set forth in claim 3 wherein the nozzle ports are spaced from each other transversely to the direction of relative movement of the components.
Claim 6
Dependent Claim
37 words
A fuel injection system as set forth in claim 4 wherein the nozzle ports are also spaced from each other in the direction of relative movement so that they will be opened and closed at different times.
Claim 7
Dependent Claim
38 words
A fuel injection system as set forth in claim 3 wherein the nozzle ports are spaced from each other in the direction of relative movement so they will be opened and closed at different times from each other.
Claim 8
Dependent Claim
23 words
A fuel injection system as set forth in claim 6 wherein the nozzle ports are generally aligned in the direction of relative movement.
Claim 9
Dependent Claim
48 words
A fuel injection system as set forth in claim 3 wherein the nozzle ports are disposed to inject fuel at a different angle relative to each other for precluding impingement of fuel issuing from one of the nozzle ports with the fuel issuing from another of nozzle ports.
Claim 10
Dependent Claim
34 words
A fuel injection system as set forth in claim 2 further including flow restricting means in the conduit upstream of the nozzle port for controlling the amount of fuel delivered to the combustion chamber.
Claim 11
Dependent Claim
24 words
A fuel injection system as set forth in claim 1 wherein the fuel injector injects fuel into an accumulator chamber formed in the conduit.
Claim 12
Dependent Claim
25 words
A fuel injection system as set forth in claim 10 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the conduit.
Claim 13
Dependent Claim
29 words
A fuel injection system as set forth in claim 11 wherein the nozzle ports are transversely spaced from each other in the direction of relative movement of the components.
Claim 14
Dependent Claim
37 words
A fuel injection system as set forth in claim 12 wherein the nozzle ports are also spaced from each other in the direction of relative movement so that they will be opened and closed at different times.
Claim 15
Dependent Claim
38 words
A fuel injection system as set forth in claim 11 wherein the nozzle ports are spaced from each other in the direction of relative movement so they will be opened and closed at different times from each other.
Claim 16
Dependent Claim
23 words
A fuel injection system as set forth in claim 14 wherein the nozzle ports are generally aligned in the direction of relative movement.
Claim 17
Dependent Claim
48 words
A fuel injection system as set forth in claim 11 wherein the nozzle ports are disposed to inject fuel at a different angle relative to each other for precluding impingement of fuel issuing from one of the nozzle ports with the fuel issuing from another of nozzle ports.
Claim 18
Dependent Claim
27 words
A fuel injection system as set forth in claim 1 wherein the means for delivering pressurized gas to the conduit comprises means for delivering pressurized atmospheric air.
Claim 19
Dependent Claim
21 words
A fuel injection system as set forth in claim 17 wherein the means for delivering pressurized air comprises an air compressor.
Claim 20
Dependent Claim
19 words
A fuel injection system as set forth in claim 18 wherein the air compressor is driven by the engine.
Claim 21
Dependent Claim
28 words
A fuel injection system as set forth in claim 19 further including a second air compressor for further compressing the air compressed by the first mentioned air compressor.
Claim 22
Dependent Claim
27 words
A fuel injection system as set forth in claim 17 wherein the air compressor comprises another variable volume chamber formed by the pair of relatively moveable components.
Claim 23
Dependent Claim
31 words
A fuel injection system as set forth in claim 1 wherein the means for delivering a pressurized gas comprises means for delivering exhaust gases from the combustion chamber to the conduit.
Claim 24
Dependent Claim
40 words
A fuel injection system as set forth in claim 1 wherein the combustion chamber includes a combustion recess and further including a spark plug positioned in the combustion recess and wherein the nozzle port is directed toward the spark plug.
Claim 25
Dependent Claim
30 words
A fuel injection system as set forth in claim 1 further including an exhaust port communicating with the variable volume chamber and opened and closed by the relatively moveable components.
Claim 26
Dependent Claim
28 words
A fuel injection system as set forth in claim 11 wherein the timing of opening of the exhaust port and of the nozzle port is substantially the same.
Claim 27
Dependent Claim
21 words
A fuel injection system as set forth in claim 25 wherein the nozzle port is disposed contiguous to the exhaust port.
Claim 28
Dependent Claim
25 words
A fuel injection system as set forth in claim 26 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the conduit.
Claim 29
Dependent Claim
39 words
A fuel injection system as set forth in claim 27 wherein the exhaust port is divided into a pair of exhaust ports disposed on transverse sides of the nozzle ports in the direction of relative movement of the components.
Claim 30
Dependent Claim
23 words
A fuel injection system as set forth in claim 27 wherein the nozzle ports are disposed on opposite sides of the exhaust port.
Claim 31
Dependent Claim
26 words
A fuel injection system as set forth in claim 1 further including for delivering air for combustion to the combustion other than through the nozzle port.
Claim 32
Dependent Claim
25 words
A fuel injection system as set forth in claim 30 wherein the air for combustion is delivered to the combustion chamber through a scavenge port.
Claim 33
Dependent Claim
20 words
A fuel injection system as set forth in claim 31 wherein the nozzle port is formed adjacent the scavenge port.
Claim 34
Dependent Claim
33 words
A fuel injection system as set forth in claim 32 wherein the scavenge port is divided into a pair of ports and the nozzle port is disposed between said pair of scavenge ports.
Claim 35
Dependent Claim
35 words
A fuel injection system as set forth in claim 32 wherein the scavenge port opening is formed with a portion that projects into the opening and wherein the nozzle port is formed in said portion.
Claim 36
Dependent Claim
25 words
A fuel injection system as set forth in claim 32 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the conduit.
Claim 37
Dependent Claim
29 words
A fuel injection system as set forth in claim 35 wherein the nozzle ports are spaced from each other transversely to the direction of relative movement of the components.
Claim 38
Dependent Claim
37 words
A fuel injection system as set forth in claim 36 wherein the nozzle ports are also spaced from each other in the direction of relative movement so that they will be opened and closed at different times.
Claim 39
Dependent Claim
38 words
A fuel injection system as set forth in claim 35 wherein the nozzle ports are spaced from each other in the direction of relative movement so they will be opened and closed at different times from each other.
Claim 40
Dependent Claim
23 words
A fuel injection system as set forth in claim 37 wherein the nozzle ports are generally aligned in the direction of relative movement.
Claim 41
Dependent Claim
48 words
A fuel injection system as set forth in claim 37 wherein the nozzle ports are disposed to inject fuel at a different angle relative to each other for precluding impingement of fuel issuing from one of the nozzle ports with the fuel issuing from another of nozzle ports.
Claim 42
Dependent Claim
35 words
A fuel injection system as set forth in claim 40 wherein the pair of scavenge ports are disposed on the transverse sides of the scavenge port in the direction of relative movement of the components.
Claim 43
Dependent Claim
21 words
A fuel injection system as set forth in claim 31 wherein the scavenge port is opened later than the nozzle port.
Claim 44
Dependent Claim
26 words
A fuel injection system as set forth in claim 30 wherein the combustion air and the source of pressurized gas are provide by the same source.
Claim 45
Dependent Claim
18 words
A fuel injection system as set forth in claim 43 wherein the same source comprises an air compressor.
Claim 46
Dependent Claim
19 words
A fuel injection system as set forth in claim 44 wherein the air compressor is driven by the engine.
Claim 47
Dependent Claim
30 words
A fuel injection system as set forth in claim 43 wherein the air compressor is formed by a further variable volume chamber formed by the pair of relatively moveable components.
Claim 48
Dependent Claim
39 words
A fuel injection system as set forth in claim 1 wherein the engine is a reciprocating engine and one of the components comprises a piston and the other of the components comprises a cylinder block and cylinder head assembly.
Claim 49
Dependent Claim
26 words
A fuel injection system as set forth in claim 47 wherein the nozzle port is formed by an opening in the wall of the cylinder block.
Claim 50
Dependent Claim
25 words
A fuel injection system as set forth in claim 48 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the conduit.
Claim 51
Dependent Claim
20 words
A fuel injection system as set forth in claim 49 wherein the nozzle ports are circumferentially spaced from each other.
Claim 52
Dependent Claim
39 words
A fuel injection system as set forth in claim 50 wherein the nozzle ports are also spaced from each other in the direction of reciprocation of the piston so that they will be opened and closed at different times.
Claim 53
Dependent Claim
40 words
A fuel injection system as set forth in claim 49 wherein the nozzle ports are spaced from each other in the direction of reciprocation of the piston so they will be opened and closed at different times from each other.
Claim 54
Dependent Claim
25 words
A fuel injection system as set forth in claim 52 wherein the nozzle ports are generally aligned in the direction of reciprocation of the piston.
Claim 55
Dependent Claim
48 words
A fuel injection system as set forth in claim 49 wherein the nozzle ports are disposed to inject fuel at a different angle relative to each other for precluding impingement of fuel issuing from one of the nozzle ports with the fuel issuing from another of nozzle ports.
Claim 56
Dependent Claim
24 words
A fuel injection system as set forth in claim 47 wherein the fuel injector injects fuel into an accumulator chamber formed in the conduit.
Claim 57
Dependent Claim
27 words
A fuel injection system as set forth in claim 47 wherein the mean for delivering pressurized gas to the conduit comprises means for delivering pressurized atmospheric air.
Claim 58
Dependent Claim
21 words
A fuel injection system as set forth in claim 56 wherein the means for delivering pressurized air comprises an air compressor.
Claim 59
Dependent Claim
19 words
A fuel injection system as set forth in claim 57 wherein the air compressor is driven by the engine.
Claim 60
Dependent Claim
28 words
A fuel injection system as set forth in claim 58 further including a second air compressor for further compressing the air compressed by the first mentioned air compressor.
Claim 61
Dependent Claim
18 words
A fuel injection system as set forth in claim 57 wherein the air compressor comprises a crankcase chamber.
Claim 62
Dependent Claim
31 words
A fuel injection system as set forth in claim 47 wherein the means for delivering a pressurized gas comprises means for delivering exhaust gases from the combustion chamber to the conduit.
Claim 63
Dependent Claim
40 words
A fuel injection system as set forth in claim 47 wherein the combustion chamber includes a combustion recess and further including a spark plug positioned in the combustion recess and wherein the nozzle port is directed toward the spark plug.
Claim 64
Dependent Claim
26 words
A fuel injection system as set forth in claim 47 further including an exhaust port in the cylinder block and opened and closed by the piston.
Claim 65
Dependent Claim
28 words
A fuel injection system as set forth in claim 63 wherein the timing of opening of the exhaust port and of the nozzle port is substantially the same.
Claim 66
Dependent Claim
21 words
A fuel injection system as set forth in claim 64 wherein the nozzle port is disposed contiguous to the exhaust port.
Claim 67
Dependent Claim
25 words
A fuel injection system as set forth in claim 65 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the conduit.
Claim 68
Dependent Claim
39 words
A fuel injection system as set forth in claim 66 wherein the exhaust port is divided into a pair of exhaust ports disposed on transverse sides of the nozzle ports in the direction of relative movement of the components.
Claim 69
Dependent Claim
23 words
A fuel injection system as set forth in claim 66 wherein the nozzle ports are disposed on opposite sides of the exhaust port.
Claim 70
Dependent Claim
28 words
A fuel injection system as set forth in claim 47 further including means for delivering air for combustion to the combustion chamber other than through the nozzle port.
Claim 71
Dependent Claim
25 words
A fuel injection system as set forth in claim 69 wherein the air for combustion is delivered to the combustion chamber through a scavenge port.
Claim 72
Dependent Claim
20 words
A fuel injection system as set forth in claim 70 wherein the nozzle port is formed adjacent the scavenge port.
Claim 73
Dependent Claim
33 words
A fuel injection system as set forth in claim 71 wherein the scavenge port is divided into a pair of ports and the nozzle port is disposed between said pair of scavenge ports.
Claim 74
Dependent Claim
35 words
A fuel injection system as set forth in claim 71 wherein the scavenge port opening is formed with a portion that projects into the opening and wherein the nozzle port is formed in said portion.
Claim 75
Dependent Claim
25 words
A fuel injection system as set forth in claim 71 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the conduit.
Claim 76
Dependent Claim
20 words
A fuel injection system as set forth in claim 74 wherein the nozzle ports are circumferentially spaced from each other.
Claim 77
Dependent Claim
32 words
A fuel injection system as set forth in claim 75 wherein the nozzle ports are also axially spaced from each other so that they will be opened and closed at different times.
Claim 78
Dependent Claim
33 words
A fuel injection system as set forth in claim 74 wherein the nozzle ports are axially spaced from each other so they will be opened and closed at different times from each other.
Claim 79
Dependent Claim
18 words
A fuel injection system as set forth in claim 77 wherein the nozzle ports are generally axially aligned.
Claim 80
Dependent Claim
48 words
A fuel injection system as set forth in claim 74 wherein the nozzle ports are disposed to inject fuel at a different angle relative to each other for precluding impingement of fuel issuing from one of the nozzle ports with the fuel issuing from another of nozzle ports.
Claim 81
Dependent Claim
35 words
A fuel injection system as set forth in claim 79 wherein the pair of scavenge ports are disposed on the transverse sides of the scavenge port in the direction of relative movement of the components.
Claim 82
Dependent Claim
21 words
A fuel injection system as set forth in claim 70 wherein the scavenge port is opened later than the nozzle port.
Claim 83
Dependent Claim
26 words
A fuel injection system as set forth in claim 69 wherein the combustion air and the source of pressurized gas are provide by the same source.
Claim 84
Dependent Claim
18 words
A fuel injection system as set forth in claim 82 wherein the same source comprises an air compressor.
Claim 85
Dependent Claim
19 words
A fuel injection system as set forth in claim 83 wherein the air compressor is driven by the engine.
Claim 86
Dependent Claim
20 words
A fuel injection system as set forth in claim 83 wherein the air compressor is formed by a crankcase chamber.
Claim 87
Dependent Claim
34 words
A fuel injection system as set forth in claim 48 further including flow restricting means in the conduit upstream of the nozzle port for controlling the amount of fuel delivered to the combustion chamber.
Claim 88
Dependent Claim
109 words
A fuel injection system for an internal combustion engine having variable volume combustion chamber defined by a pair of relatively movable components, a plurality of nozzle ports extending through one of said components and opened and closed only by the relative movement of said components, said nozzle ports begin spaced from each other transversely to the direction of relative movement of said components, a conduit extending to said nozzle port from externally of said combustion chamber, means for delivering a pressurized gas to said conduit at least during a portion of the time when said nozzle port is opened, and a fuel injector for injecting fuel into said conduit.
Claim 89
Dependent Claim
109 words
A fuel injection system for an internal combustion engine having variable volume combustion chamber defined by a pair of relatively movable components, a plurality of nozzle ports extending through one of said components and opened and closed only by the relative movement of said components, said nozzle ports begin spaced from each other transversely to the direction of relative movement of said components, a conduit extending to said nozzle port from externally of said combustion chamber, means for delivering a pressurized gas to said conduit at least during a portion of the time when said nozzle port is opened, and a fuel injector for injecting fuel into said conduit.
Claim 90
Dependent Claim
36 words
A fuel injection system as set forth in claim 87 wherein the nozzle ports are formed by openings in the wall of one of said relatively moveable components which defines a portion of the combustion chamber.
Claim 91
Dependent Claim
37 words
A fuel injection system as set forth in claim 88 wherein the nozzle ports are also spaced from each other in the direction of relative movement so that they will be opened and closed at different times.
Claim 92
Dependent Claim
107 words
A fuel injection system for an internal combustion engine having a variable volume combustion chamber defined by a pair of relatively movable components, a plurality of nozzle ports extending through one of said components, said nozzle ports being spaced from each other in the direction of relative movement so they will be opened and closed at different times from each other, a conduit extending to said nozzle ports form externally of said combustion chamber, mean for delivering a pressurized gas to said conduit at least during a portion of the time when said nozzle port is opened, and a fuel injector for injecting fuel into said conduit.
Claim 93
Dependent Claim
107 words
A fuel injection system for an internal combustion engine having a variable volume combustion chamber defined by a pair of relatively movable components, a plurality of nozzle ports extending through one of said components, said nozzle ports being spaced from each other in the direction of relative movement so they will be opened and closed at different times from each other, a conduit extending to said nozzle ports form externally of said combustion chamber, mean for delivering a pressurized gas to said conduit at least during a portion of the time when said nozzle port is opened, and a fuel injector for injecting fuel into said conduit.
Claim 94
Dependent Claim
23 words
A fuel injection system as set forth in claim 90 wherein the nozzle ports are generally aligned in the direction of relative movement.
Claim 95
Dependent Claim
48 words
A fuel injection system as set forth in claim 90 wherein the nozzle ports are disposed to inject fuel at a different angle relative to each other for precluding impingement of fuel issuing from end of the nozzle ports with the fuel issuing form another of nozzle ports.
Claim 96
Dependent Claim
153 words
A fuel injection system for a two cycle internal combustion engine having a cylinder block/cylinder head assembly defining a cylinder bore closed by the said cylinder head, a piston reciprocating in said cylinder bore, a scavenge port extending through said cylinder bore in a position to be opened and closed by the reciprocation of said piston, means for delivering an air charge to said scavenge port, an exhaust port opening through said cylinder bore and opened and closed by the reciprocation of said piston, a nozzle port extending through said cylinder bore and opened and closed only by the reciprocation of said piston, an accumulator chamber formed by said cylinder block/cylidner head assembly and communicating with said nozzle port, means for delivering a pressurized air charge to said accumulator chamber for discharge into said cylinder bore when said nozzle port is opened, and a fuel injector for injecting fuel into said accumulator chamber.
Claim 97
Dependent Claim
153 words
A fuel injection system for a two cycle internal combustion engine having a cylinder block/cylinder head assembly defining a cylinder bore closed by the said cylinder head, a piston reciprocating in said cylinder bore, a scavenge port extending through said cylinder bore in a position to be opened and closed by the reciprocation of said piston, means for delivering an air charge to said scavenge port, an exhaust port opening through said cylinder bore and opened and closed by the reciprocation of said piston, a nozzle port extending through said cylinder bore and opened and closed only by the reciprocation of said piston, an accumulator chamber formed by said cylinder block/cylidner head assembly and communicating with said nozzle port, means for delivering a pressurized air charge to said accumulator chamber for discharge into said cylinder bore when said nozzle port is opened, and a fuel injector for injecting fuel into said accumulator chamber.
Claim 98
Dependent Claim
33 words
A fuel injection system for a two cycle internal combustion engine as set forth in claim 93 wherein the nozzle port comprises a plurality of nozzle ports, each communicating with the accumulator chamber.
Claim 99
Dependent Claim
27 words
A fuel injection system for a two cycle internal combustion engine as set forth in claim 95 wherein the nozzle ports are circumferentially spaced form each other.
Claim 100
Dependent Claim
44 words
A fuel injection system for a two cycle internal combustion engine as set forth in claim 95 wherein the nozzle ports are also spaced from each other int the direction of relative movement so that they will be opened and closed at different times.
Claim 101
Dependent Claim
44 words
A fuel injection system for a two cycle internal combustion engine as set forth in claim 96 wherein the nozzle ports are spaced form each other axially along the cylinder bore so they will be opened and closed at different times from each other.
Claim 102
Dependent Claim
28 words
A fuel injection system for a two cycle internal combustion engine as set forth in claim 97 wherein the nozzle ports are generally aligned in an axial direction.
Claim 103
Dependent Claim
55 words
A fuel injection system for a two cycle internal combustion engine as set forth in claim 94 wherein the nozzle ports are disposed to inject fuel at a different angels relative to each other for precluding impingement of fuel issuing form one of the nozzle ports with the fuel issuing from another of nozzle ports.
Claim 104
Dependent Claim
28 words
A fuel injection system for a two cycle internal combustion engine as set forth in claim 93 wherein the scavenge port is opened later than the nozzle port.
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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) | 1996-10-04 | 1997-04-05 | 1997-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-04 | 2001-04-05 | 2001-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-04 | 2005-04-05 | 2005-10-05 | $7700.00 | Window Closed / Lapsed |