US5407131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection control valve
Assignee: Caterpillar Inc
•
Filing: 1994-01-25
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Granted: 1995-04-18
•
Expires: 2014-01-25
Abstract
Abstract A control valve assembly for a fuel injector includes a valve seat with fluid inlet and fluid outlet and a flat seating surface. A poppet valve has a concave end portion with knife edge for sealingly engaging the flat seating surface on the valve seat. The poppet valve is operated to close by a solenoid coil and is opened and maintained open by a return spring or a permanent magnet. Faster valve closing and faster valve opening is obtained.
Inventors
- 👤 Dale C. Maley
- 👤 Oded E. Sturman
- 👤 Matthew S. Touvelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:47
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/44; F02M59/46; F02M59/466; F02M57/00; F02M57/02; F02M59/20; F02M59/36; F02M59/366; F02B; F02B2275/00; F02B2275/14; F02M2200/00; F02M2200/20; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
136 words
A fluid pressure control valve assembly for a fuel injector comprising: a valve body with fluid inlet and fluid outlet ports; a valve seat communicating with said fluid inlet and said fluid outlet ports, said valve seat having a flat seating surface; a poppet valve slidably mounted in said valve body with one poppet end portion sealingly engagable with said valve seat flat seating surface to block said fluid inlet; an electrical actuator adapted for mounting at the other poppet end portion and operably energized for moving said poppet valve into said sealing engagement with said valve seat; return means coupled to said poppet valve to disengage said poppet valve from said valve seat; and said one poppet end portion having a concave end portion for sealingly engaging said flat seating surface of said valve seat.
Claim 2
Dependent Claim
136 words
A fluid pressure control valve assembly for a fuel injector comprising: a valve body with fluid inlet and fluid outlet ports; a valve seat communicating with said fluid inlet and said fluid outlet ports, said valve seat having a flat seating surface; a poppet valve slidably mounted in said valve body with one poppet end portion sealingly engagable with said valve seat flat seating surface to block said fluid inlet; an electrical actuator adapted for mounting at the other poppet end portion and operably energized for moving said poppet valve into said sealing engagement with said valve seat; return means coupled to said poppet valve to disengage said poppet valve from said valve seat; and said one poppet end portion having a concave end portion for sealingly engaging said flat seating surface of said valve seat.
Claim 3
Dependent Claim
42 words
A control valve assembly according to claim 1, wherein said return means includes a spring adapted to provide a spring force on said poppet valve to disengage said poppet valve from said valve seat when said electrical actuator is not operably energized.
Claim 4
Dependent Claim
45 words
A control valve assembly according to claim 1, wherein said return means includes a permanent magnet to provide a magnetic latching force on said poppet valve and maintain disengagement of said poppet valve from said valve seat when said electrical actuator is not operably energized.
Claim 5
Dependent Claim
54 words
A control valve assembly according to claim 1, wherein said poppet valve concave end portion includes a knife edge for sealingly engaging said flat seating surface of said valve seat in a flat seat seal on valve closing during pressurized fuel injection and for responding to pressurized fluid for rapidly opening said poppet valve.
Claim 6
Dependent Claim
24 words
A control valve assembly according to claim 4, including a barrel guide adjacent said valve seat and adapted for slidably guiding said poppet valve.
Claim 7
Dependent Claim
38 words
A control valve assembly according to claim 5, wherein said barrel guide includes a cavity facing said flat seating surface of said valve seat to define a fluid chamber communicating with said fluid inlet and said fluid outlet.
Claim 8
Dependent Claim
41 words
A control valve assembly according to claim 6, wherein said return means includes a spring adapted to provide a spring force on said poppet valve to disengage said poppet from said valve seat when said electrical actuator is not operably energized.
Claim 9
Dependent Claim
45 words
A control valve assembly according to claim 6, wherein said return means includes a permanent magnet to provide a selected magnetic latching force on said poppet valve and maintain disengagement of said poppet from said valve seat when said electrical actuator is not operably energized.
Claim 10
Dependent Claim
17 words
A control valve assembly according to claim 1, wherein said fuel injector is a unit fuel pump-injector.
Claim 11
Dependent Claim
15 words
A control valve assembly according to claim 1, wherein said electrical actuator is a solenoid.
Claim 12
Dependent Claim
179 words
An electronically-controlled fuel injector system comprising: an injector body having a fuel inlet and a fuel outlet; a fuel injection pumping assembly, including a nozzle receiving fuel from said fuel inlet for injecting said fuel under pressure from said pumping assembly; a pressure control valve assembly for controlling the injecting of said fuel, said control valve assembly including a valve seat having a valve seat inlet connected to said injector body fuel outlet and having a drain fuel outlet, said control valve assembly including, a poppet valve slidably mounted in said valve body with one poppet end portion sealingly engagable with said valve seat flat seating surface to block said valve seat inlet; said one poppet end portion having a concave end portion for sealingly engaging said flat seating surface of said valve seat; an electrical actuator adapted for mounting at the other poppet end portion and operably energized for moving said poppet valve into said sealing engagement with said valve seat; and return means coupled to said poppet valve to disengage said poppet valve from said valve seat.
Claim 13
Dependent Claim
179 words
An electronically-controlled fuel injector system comprising: an injector body having a fuel inlet and a fuel outlet; a fuel injection pumping assembly, including a nozzle receiving fuel from said fuel inlet for injecting said fuel under pressure from said pumping assembly; a pressure control valve assembly for controlling the injecting of said fuel, said control valve assembly including a valve seat having a valve seat inlet connected to said injector body fuel outlet and having a drain fuel outlet, said control valve assembly including, a poppet valve slidably mounted in said valve body with one poppet end portion sealingly engagable with said valve seat flat seating surface to block said valve seat inlet; said one poppet end portion having a concave end portion for sealingly engaging said flat seating surface of said valve seat; an electrical actuator adapted for mounting at the other poppet end portion and operably energized for moving said poppet valve into said sealing engagement with said valve seat; and return means coupled to said poppet valve to disengage said poppet valve from said valve seat.
Claim 14
Dependent Claim
43 words
An electronically-controlled fuel injector system according to claim 11, wherein said return means includes a spring adapted to provide a spring force on said poppet valve to disengage said poppet valve from said valve seat when said electrical actuator is not operably energized.
Claim 15
Dependent Claim
46 words
An electronically-controlled fuel injector system according to claim 11, wherein said return means includes a permanent magnet to provide a magnetic latching force on said poppet valve and maintain disengagement of said poppet valve from said valve seat when said electrical actuator is not operably energized.
Claim 16
Dependent Claim
57 words
An electronically-controlled fuel injector system according to claim 11, wherein said poppet valve concave end portion includes a complementary knife edge for sealingly engaging said flat seating surface of said valve seat in a flat seat seal on valve closing during pressurized fuel injection and for responding to said pressurized fuel for rapidly opening said poppet valve.
Claim 17
Dependent Claim
250 words
An electronically-controlled unit fuel pump-injector comprising: an injector body with a fuel inlet and a fuel outlet; a fuel injection pumping assembly, including a nozzle receiving fuel from said fuel inlet for injecting said fuel under pressure from said pumping assembly; a control valve assembly for controlling the injecting of said fuel, said control valve assembly including a valve seat having a valve seat inlet connected to said injector body fuel outlet and having a drain fuel outlet, said control valve assembly including, a poppet valve slidably mounted in said valve body with one poppet end portion sealingly engagable with said valve seat flat seating surface to block said valve seat inlet; said one poppet end portion having a concave end portion with a knife edge for sealingly engaging said flat seating surface of said valve seat in a flat seat seal on valve closing during pressurized fuel injection and for responding to said pressurized fuel for rapidly opening said valve; a barrel guide adjacent said valve seat and adapted for slidably guiding said poppet valve, said barrel guide including a cavity facing said flat sealing surface of said valve seat to define a fuel chamber communicating with said fuel inlet and said fuel outlet; an electrical actuator adapted for mounting at the other poppet end portion and operably energized for moving said poppet valve into said sealing engagement with said valve seat; and return means coupled to said poppet valve to disengage said poppet valve from said valve seat.
Claim 18
Dependent Claim
250 words
An electronically-controlled unit fuel pump-injector comprising: an injector body with a fuel inlet and a fuel outlet; a fuel injection pumping assembly, including a nozzle receiving fuel from said fuel inlet for injecting said fuel under pressure from said pumping assembly; a control valve assembly for controlling the injecting of said fuel, said control valve assembly including a valve seat having a valve seat inlet connected to said injector body fuel outlet and having a drain fuel outlet, said control valve assembly including, a poppet valve slidably mounted in said valve body with one poppet end portion sealingly engagable with said valve seat flat seating surface to block said valve seat inlet; said one poppet end portion having a concave end portion with a knife edge for sealingly engaging said flat seating surface of said valve seat in a flat seat seal on valve closing during pressurized fuel injection and for responding to said pressurized fuel for rapidly opening said valve; a barrel guide adjacent said valve seat and adapted for slidably guiding said poppet valve, said barrel guide including a cavity facing said flat sealing surface of said valve seat to define a fuel chamber communicating with said fuel inlet and said fuel outlet; an electrical actuator adapted for mounting at the other poppet end portion and operably energized for moving said poppet valve into said sealing engagement with said valve seat; and return means coupled to said poppet valve to disengage said poppet valve from said valve seat.
Claim 19
Dependent Claim
43 words
An electronically-controlled unit fuel pump-injector according to claim 15, wherein said return means includes a spring adapted to provide a spring force on said poppet valve to disengage said poppet valve from said valve seat when said electrical actuator is not operably energized.
Claim 20
Dependent Claim
46 words
An electronically-controlled unit fuel pump-injector according to claim 15, wherein said return means includes a permanent magnet to provide a magnetic latching force on said poppet valve and maintain disengagement of said poppet valve from said valve seat when said electrical actuator is not operably energized.
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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) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |