US5746189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
EGR gas assist injection system for internal combustion engine
Assignee: Soken Inc
•
Filing: 1996-10-03
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Granted: 1998-05-05
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Expires: 2016-10-03
Abstract
Abstract An EGR (Exhaust Gas Recirculation) gas assist injection system for an internal combustion engine is provided which includes fuel injectors, sub-exhaust valves, and EGR valves. Each of the sub-exhaust valves is mechanically opened in synchronization with the start of an exhaust process of a corresponding one of engine cylinders. Each of the EGR valves is electrically opened to supply part of exhaust gas discharged through one of the subexhaust valves from one of the engine cylinders which is in the exhaust process to mix it with fuel sprayed into another of the engine cylinders which is in an intake process for promoting atomization of the fuel spray and achieving EGR.
Inventors
- 👤 Yoshihumi Kuzuya
- 👤 Kimitaka Saito
- 👤 Hitoshi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/047; F02B; F02B31/00; F02B31/08; F02B31/087; F02D; F02D21/00; F02D21/06; F02D21/08; F02M26/00; F02M26/13; F02M26/36; F02M67/00; F02M67/06; F02M26/17; F02M26/20; F02M26/35; F02M26/42; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
106 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; and EGR means for recirculating a part of exhaust gasses discharged from a port formed in a cylinder head of one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process.
Claim 2
Dependent Claim
106 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; and EGR means for recirculating a part of exhaust gasses discharged from a port formed in a cylinder head of one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process.
Claim 3
Dependent Claim
45 words
An EGR gas assist injection system as set forth in claim 1, wherein said EGR means includes exhaust gas valves each disposed in one of cylinder heads of the engine cylinders, communicating with the EGR gas nozzle of said fuel injector through an exhaust passage.
Claim 4
Dependent Claim
63 words
An EGR gas assist injection system as set forth in claim 2, wherein said EGR means further includes EGR valves disposed within portions of an exhaust passage communicating with combustion chambers of the engine cylinders through the exhaust gas valves, respectively, for selectively establishing and blocking supply of the part of the exhaust gasses to the EGR gas nozzle of said fuel injector.
Claim 5
Dependent Claim
42 words
An EGR gas assist injection system as set forth in claim 1, wherein said EGR means includes exhaust gas valves each disposed in one of exhaust passages communicating with the engine cylinders, connected to the EGR gas nozzle of said fuel injector.
Claim 6
Dependent Claim
50 words
An EGR gas assist injection system as set forth in claim 4, wherein said EGR means further includes EGR valves each disposed within one of the exhaust passages for selectively establishing and blocking communication between one of the exhaust gas valves and the EGR gas nozzle of said fuel injector.
Claim 7
Dependent Claim
27 words
An EGR gas assist injection system as set forth in claim 1, wherein said fuel injector injects the fuel directly into combustion chambers of the engine cylinders.
Claim 8
Dependent Claim
31 words
An EGR gas assist injection system as set forth in claim 1, wherein said fuel injector injects the fuel into an intake passage communicating with combustion chambers of the engine cylinders.
Claim 9
Dependent Claim
178 words
An EGR gas assist injection system for an internal combustion engine comprising: fuel injectors provided one for each of engine cylinders of the engine for spraying fuel from injection nozzles for fuel supply to the engine cylinders, said fuel injectors having EGR gas nozzles, respectively; exhaust valves communicating between combustion chambers of the engine cylinders and the EGR gas nozzles of said fuel injectors through exhaust passages, respectively; EGR valves disposed within the exhaust passages for selectively establishing and blocking communications between said exhaust valves and the EGR gas nozzles of said fuel injectors, respectively; and control means for controlling operations of said EGR valves, said control means opening one of said EGR valves for supplying part of exhaust gas discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle of one of said fuel injectors to mix the part of exhaust gas with the fuel sprayed from the injection nozzle of the one of said fuel injectors into another of the engine cylinders which is in an intake process.
Claim 10
Dependent Claim
178 words
An EGR gas assist injection system for an internal combustion engine comprising: fuel injectors provided one for each of engine cylinders of the engine for spraying fuel from injection nozzles for fuel supply to the engine cylinders, said fuel injectors having EGR gas nozzles, respectively; exhaust valves communicating between combustion chambers of the engine cylinders and the EGR gas nozzles of said fuel injectors through exhaust passages, respectively; EGR valves disposed within the exhaust passages for selectively establishing and blocking communications between said exhaust valves and the EGR gas nozzles of said fuel injectors, respectively; and control means for controlling operations of said EGR valves, said control means opening one of said EGR valves for supplying part of exhaust gas discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle of one of said fuel injectors to mix the part of exhaust gas with the fuel sprayed from the injection nozzle of the one of said fuel injectors into another of the engine cylinders which is in an intake process.
Claim 11
Dependent Claim
98 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine; an EGR gas nozzle being formed in said fuel injector; and EGR means for recirculating a part of exhaust gasses discharged from a port formed in a cylinder head of one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle into another of the engine cylinders.
Claim 12
Dependent Claim
98 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine; an EGR gas nozzle being formed in said fuel injector; and EGR means for recirculating a part of exhaust gasses discharged from a port formed in a cylinder head of one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle into another of the engine cylinders.
Claim 13
Dependent Claim
45 words
An EGR gas assist injection system as set forth in claim 9, wherein said EGR means includes exhaust gas valves each disposed in one of cylinder heads of the engine cylinders, communicating with the EGR gas nozzle of said fuel injector through an exhaust passage.
Claim 14
Dependent Claim
63 words
An EGR gas assist injection system as set forth in claim 9, wherein said EGR means further includes EGR valves disposed within portions of an exhaust passage communicating with combustion chambers of the engine cylinders through the exhaust gas valves, respectively, for selectively establishing and blocking supply of the part of the exhaust gasses to the EGR gas nozzle of said fuel injector.
Claim 15
Dependent Claim
42 words
An EGR gas assist injection system as set forth in claim 9, wherein said EGR means includes exhaust gas valves each disposed in one of exhaust passages communicating with the engine cylinders, connected to the EGR gas nozzle of said fuel injector.
Claim 16
Dependent Claim
50 words
An EGR gas assist injection system as set forth in claim 9, wherein said EGR means further includes EGR valves each disposed within one of the exhaust passages for selectively establishing and blocking communication between one of the exhaust gas valves and the EGR gas nozzle of said fuel injector.
Claim 17
Dependent Claim
27 words
An EGR gas assist injection system as set forth in claim 9, wherein said fuel injector injects the fuel directly into combustion chambers of the engine cylinders.
Claim 18
Dependent Claim
31 words
An EGR gas assist injection system as set forth in claim 9, wherein said fuel injector injects the fuel into an intake passage communicating with combustion chambers of the engine cylinders.
Claim 19
Dependent Claim
131 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; EGR means for recirculating a part of exhaust gasses discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process; and wherein said EGR means includes exhaust gas valves each disposed in one of cylinder heads of the engine cylinders, communication with the EGR gas nozzle of said fuel injector through an exhaust passage.
Claim 20
Dependent Claim
131 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; EGR means for recirculating a part of exhaust gasses discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process; and wherein said EGR means includes exhaust gas valves each disposed in one of cylinder heads of the engine cylinders, communication with the EGR gas nozzle of said fuel injector through an exhaust passage.
Claim 21
Dependent Claim
63 words
An EGR gas assist injection system as set forth in claim 16, wherein said EGR means further includes EGR valves disposed within portions of an exhaust passage communicating with combustion chambers of the engine cylinders through an exhaust gas valves, respectively, for selectively establishing and blocking supply of the part of the exhaust gasses to the EGR gas nozzle of said fuel injection.
Claim 22
Dependent Claim
128 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; EGR means for recirculating a part of exhaust gasses discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process; and wherein said EGR means includes exhaust gas valves each disposed in one of exhaust passages communicating with the engine cylinders, connected to the EGR gas nozzle of said fuel injector.
Claim 23
Dependent Claim
128 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; EGR means for recirculating a part of exhaust gasses discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process; and wherein said EGR means includes exhaust gas valves each disposed in one of exhaust passages communicating with the engine cylinders, connected to the EGR gas nozzle of said fuel injector.
Claim 24
Dependent Claim
50 words
An EGR gas assist injection system as set forth in claim 18, wherein said EGR means further includes EGR valves each disposed within one of the exhaust passages for selectively establishing and blocking communication between one of the exhaust gas valves and the EGR gas nozzle of said fuel injector.
Claim 25
Dependent Claim
113 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; EGR means for recirculating a part of exhaust gasses discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process; and wherein said fuel injector injects the fuel directly into combustion chambers of the engine cylinders.
Claim 26
Dependent Claim
113 words
An EGR gas assist injection system for an internal combustion engine comprising: a fuel injector for spraying fuel from an injection nozzle to supply fuel to engine cylinders of the engine, said fuel injector having an EGR gas nozzle; EGR means for recirculating a part of exhaust gasses discharged from one of the engine cylinders which is in an exhaust process to the EGR gas nozzle to mix the part of exhaust gasses with the fuel sprayed from the injection nozzle of said fuel injector into another of the engine cylinders which is in an intake process; and wherein said fuel injector injects the fuel directly into combustion chambers of the engine cylinders.
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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) | 2001-05-04 | 2001-11-03 | 2002-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-04 | 2005-11-03 | 2006-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-04 | 2009-11-03 | 2010-05-05 | $7700.00 | Window Closed / Lapsed |