US5123399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air fuel injector assembly
Assignee: Yamaha Motor Co Ltd
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Filing: 1990-10-02
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Granted: 1992-06-23
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Expires: 2010-10-02
Abstract
Abstract A fuel air injection system for a multiple cylinder engine wherein an air manifold is rigidly affixed to all of the fuel air injectors so as to form a unitary assembly that can be removed from the engine as a unit.
Inventors
- 👤 Yu Motoyama
- 👤 Junichi Kaku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:29
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/14; F02M67/00; F02M67/10; F02M67/12; F02M69/00; F02M69/08; F02M69/46; F02M69/462; F02M69/465; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/12; F02B2075/125; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
A rigid air fuel injection assembly for attachment as a unit to a multiple cylinder engine, said assembly comprising a plurality of air fuel injectors each having valved chamber means adopted to communicate with a respective combustion chamber of said engine, at least one fuel injection nozzle mounted directly and rigidly to each of said air fuel injectors for delivering fuel to the respective chamber means of said air fuel injector, a fuel manifold for delivering fuel to said fuel injection nozzle, an air manifold for delivering compressed air to said chamber means of fuel air injectors, at least one of said manifolds being formed from a relatively rigid material and being directly and rigidly affixed to said fuel air injectors for removal of all of said fuel air injectors, said fuel injectors and said manifold as an assembly from said engine and means for rigidly connecting said assembly to a cylinder head of said engine.
Claim 2
Dependent Claim
156 words
A rigid air fuel injection assembly for attachment as a unit to a multiple cylinder engine, said assembly comprising a plurality of air fuel injectors each having valved chamber means adopted to communicate with a respective combustion chamber of said engine, at least one fuel injection nozzle mounted directly and rigidly to each of said air fuel injectors for delivering fuel to the respective chamber means of said air fuel injector, a fuel manifold for delivering fuel to said fuel injection nozzle, an air manifold for delivering compressed air to said chamber means of fuel air injectors, at least one of said manifolds being formed from a relatively rigid material and being directly and rigidly affixed to said fuel air injectors for removal of all of said fuel air injectors, said fuel injectors and said manifold as an assembly from said engine and means for rigidly connecting said assembly to a cylinder head of said engine.
Claim 3
Dependent Claim
24 words
An air fuel injection unit as set forth in claim 1 wherein the manifold affixed to the fuel air injectors comprises the air manifold.
Claim 4
Dependent Claim
57 words
An air fuel injection unit as set forth in claim 2 wherein the fuel air injectors are comprised of a housing assembly having a lower piece adapted to extend into the cylinder head and having an enlarged portion received in a bore of a second housing piece that is adapted to be affixed to the cylinder head.
Claim 5
Dependent Claim
22 words
An air fuel injection unit as set forth in claim 3 wherein the air manifold is affixed to the second housing piece.
Claim 6
Dependent Claim
47 words
An air fuel injection unit as set forth in claim 1 wherein the air fuel injectors comprise housing assemblies with the fuel injection nozzles being disposed on one side of said housing assembly and the air manifold being disposed on the other side of the housing assembly.
Claim 7
Dependent Claim
31 words
An air fuel injection unit as set forth in claim 5 wherein the air manifold extends in a direction generally parallel to the axis of rotation of the engine output shaft.
Claim 8
Dependent Claim
39 words
An air fuel injection unit as set forth in claim 6 wherein the fuel manifold is disposed on the opposite side of the housing assembly from the air manifold and on the same side as the fuel injection nozzles.
Claim 9
Dependent Claim
38 words
An air fuel injection unit as set forth in claim 1 wherein the manifold is affixed by threaded fastening means to the fuel air injectors for removal of the fuel air injectors as a unit with the manifold.
Claim 10
Dependent Claim
40 words
An air fuel injection unit as set forth in claim 4 wherein the air manifold is affixed by threaded fastening means to the fuel air injectors for removal of the fuel air injectors as a unit with the air manifold.
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) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |