US3612012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle
Assignee: Deutz Allis Corp
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Filing: 1969-12-04
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Granted: 1971-10-12
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Expires: 1989-12-04
Abstract
Abstract A fuel injection nozzle having a long narrow passage between the differential valve and the discharge orifices with narrow walls surrounding the passage to form a long narrow tip of small cross sectional area. The opening in the cylinder deck facing the combustion chamber receiving the tip is correspondingly small to decrease heat transfer from the combustion chamber to the needle valve.
Inventors
- 👤 Alexander Dreisin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:38
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/14; F02M61/04; F02M61/10; F02M2700/00; F02M2700/07; F02M2700/074
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
218 words
A fuel injection nozzle in an internal combustion engine comprising, means defining a body of the fuel injection nozzle having inlet passage means, a needle valve connected to said inlet passage means for opening in response to a predetermined pressure of a pressurized fluid in said inlet passage means, a nozzle tip defining orifice means for discharging pressurized fluid into a combustion chamber, long thin walls connecting said needle valve to said nozzle tip defining a long sac passage connected to the orifice means and a substantially reduced crosssectional area of the nozzle between said needle valve and said nozzle tip relative to said body, a cylinder head defining an opening for receiving the body of said fuel injector, said cylinder head defining an annular flange of a thickness substantially equal to the length of said long sac passage and forming a continuation of said opening of substantially reduced diameter surrounding the tip of said fuel injector and forming an air space between the nozzle and head from the needle valve to the combustion chamber, said head and mounting of said nozzle providing a heat shield and insulation means to reduce heat transfer from hot combustion gases in a combustion chamber to the needle valve in said fuel injector for providing cool operating temperatures for said needle valve.
Claim 2
Dependent Claim
218 words
A fuel injection nozzle in an internal combustion engine comprising, means defining a body of the fuel injection nozzle having inlet passage means, a needle valve connected to said inlet passage means for opening in response to a predetermined pressure of a pressurized fluid in said inlet passage means, a nozzle tip defining orifice means for discharging pressurized fluid into a combustion chamber, long thin walls connecting said needle valve to said nozzle tip defining a long sac passage connected to the orifice means and a substantially reduced crosssectional area of the nozzle between said needle valve and said nozzle tip relative to said body, a cylinder head defining an opening for receiving the body of said fuel injector, said cylinder head defining an annular flange of a thickness substantially equal to the length of said long sac passage and forming a continuation of said opening of substantially reduced diameter surrounding the tip of said fuel injector and forming an air space between the nozzle and head from the needle valve to the combustion chamber, said head and mounting of said nozzle providing a heat shield and insulation means to reduce heat transfer from hot combustion gases in a combustion chamber to the needle valve in said fuel injector for providing cool operating temperatures for said needle valve.
Claim 3
Dependent Claim
45 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 wherein said thin walls of said nozzle define a thickness no greater than the diameter of said long sac passage and are intermittently cooled during each cycle of fuel injection.
Claim 4
Dependent Claim
55 words
A fuel injection nozzle in an internal combustion engine as Set forth in claim 1 wherein the body of said nozzle defines a tapered portion adjoining the long thin walls connected to said needle valve whereby the tip of said fuel injector is of substantially smaller cross-sectional area than the body of said fuel injector.
Claim 5
Dependent Claim
49 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 wherein said thin walls of said fuel injection nozzle define a cross-sectional area of approximately one-ninth of the cross-sectional area of the body of said nozzle to reduce heat flow to said needle valve.
Claim 6
Dependent Claim
53 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 wherein said thin walls defining said long sac passage form an external diameter no greater than the external diameter of the needle in said needle valve for limiting the heat transfer to the needle valve of said nozzle.
Claim 7
Dependent Claim
36 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 wherein said head defines an annular heat shield of substantial thickness forming the opening for receiving the fuel injection nozzle tip.
Claim 8
Dependent Claim
42 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 wherein said nozzle includes a sealing washer positioned intermediate the body of said fuel injection nozzle and said head to reduce heat flow toward said nozzle body.
Claim 9
Dependent Claim
46 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 wherein said tip defines a cross-sectional diameter of less than one-third of the length of said long sac passage in said nozzle tip to reduce heat flow toward said nozzle body.
Claim 10
Dependent Claim
44 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 wherein said head defines an annular heat shield forming a heat sink for absorbing heat from the hot combustion gases to prevent transfer of heat to the needle valve.
Claim 11
Dependent Claim
54 words
A fuel injection nozzle in an internal combustion engine as set forth in claim 1 including said tip defining an exposed area adapted for facing hot gases in an internal combustion engine equal to the cross sectional area of the long sac passage walls to thereby limit heat transfer to the needle valve seat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |