US3830433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1972-11-09
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Granted: 1974-08-20
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Expires: 1992-11-09
Abstract
Abstract A pintle type fuel injection nozzle comprises a nozzle body, a needle movable relative to the nozzle body, and means provided above the needle for controlling the extent of lift of the needle according to the engine speed and engine load.
Inventors
- 👤 M Miyake
- 👤 S Okada
- 👤 H Fujisawa
- 👤 O Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:39
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/04; F02M61/06; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0635; F02M51/0642; F02M51/0653; F02M51/066; F02M51/0664; F02M51/0671; F02M51/0685; F02M61/16; F02M61/161
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
205 words
In a pintle type fuel injection nozzle of the type including a nozzle body formed with a cavity receiving fuel under pressure and with a cylindrical discharge orifice communicating with the cavity, a needle mounted for movement in the nozzle body for reciprocation axially of the orifice to control discharge of fuel therethrough, the needle being subjected to the pressure of the fuel in the cavity acting to move the needle in a nozzle opening direction, and means biasing the needle in a nozzle closing direction; the improvement comprising, in combination, said needle having a reduced extension engageable in said orifice and formed with an inner cylindrical portion, a downwardly tapering intermediate portion extending from said cylindrical portion, and a downwardly flaring outer portion extending from said intermediate portion and terminating in an outer edge, of a diameter less than that of said orifice, movable axially into and out of said orifice, upon reciprocation of said needle, to vary the spray angle and magnitude of penetration of the fuel discharged from said nozzle; and control means operatively associated with said needle and controlling the extend of lift of said needle, responsive to fuel pressure in said cavity, in accordance with engine speed and engine load.
Claim 2
Dependent Claim
205 words
In a pintle type fuel injection nozzle of the type including a nozzle body formed with a cavity receiving fuel under pressure and with a cylindrical discharge orifice communicating with the cavity, a needle mounted for movement in the nozzle body for reciprocation axially of the orifice to control discharge of fuel therethrough, the needle being subjected to the pressure of the fuel in the cavity acting to move the needle in a nozzle opening direction, and means biasing the needle in a nozzle closing direction; the improvement comprising, in combination, said needle having a reduced extension engageable in said orifice and formed with an inner cylindrical portion, a downwardly tapering intermediate portion extending from said cylindrical portion, and a downwardly flaring outer portion extending from said intermediate portion and terminating in an outer edge, of a diameter less than that of said orifice, movable axially into and out of said orifice, upon reciprocation of said needle, to vary the spray angle and magnitude of penetration of the fuel discharged from said nozzle; and control means operatively associated with said needle and controlling the extend of lift of said needle, responsive to fuel pressure in said cavity, in accordance with engine speed and engine load.
Claim 3
Dependent Claim
42 words
In a pintle type fuel injection nozzle according to claim 1, said needle lift control means including a control rod disposed in axial alignment with and spaced from said needle, and means operable to control the axial position of said control rod.
Claim 4
Dependent Claim
48 words
In a pintle type fuel injection nozzle according to claim 2, wherein said rod position controlling means includes an electromagnetic coil disposed on a nozzle holder body, an extension of said control rod extending through said electromagnetic coil, and a needle lift controller coupled to said electromagnetic coil.
Claim 5
Dependent Claim
48 words
The pintle type fuel injection coiL according to claim 1, wherein said needle lift control means includes a small diameter extension integral with the inner end of said needle, a stationary electromagnetic coil surrounding said small diameter extension, and a needle lift controller coupled to said electromagnetic coil.
Claim 6
Dependent Claim
83 words
A fuel injection system comprising the pintle type fuel injection nozzle according to claim 4, a speed regulator to provide a signal according to the engine speed and engine load, a fuel controller receiving the output signal of said speed regulator, and an optimum lift calculator receiving the output signal of said fuel controller, the output of said optimum lift calculator being coupled to said needle lift controller, and the output of said fuel controller being also used to control a fuel valve.
Claim 7
Dependent Claim
123 words
A pintle type fuel injection nozzle comprising a nozzle body, a needle movable relative to said nozzle body, and means provided above said needle for controlling the extent of lift of said needle according to the engine speed and engine load; said needle lift control means including a control rod disposed inwardly of said needle and spaced from said needle, and means to control the vertical position of said control rod; said vertical rod position controlling means including a male thread formed on an upper portion of said control rod, a female thread member provided on top of a nozzle holder body and screwed on said male threaded portion, and means provided on top of said control rod for rotating said control rod.
Claim 8
Dependent Claim
123 words
A pintle type fuel injection nozzle comprising a nozzle body, a needle movable relative to said nozzle body, and means provided above said needle for controlling the extent of lift of said needle according to the engine speed and engine load; said needle lift control means including a control rod disposed inwardly of said needle and spaced from said needle, and means to control the vertical position of said control rod; said vertical rod position controlling means including a male thread formed on an upper portion of said control rod, a female thread member provided on top of a nozzle holder body and screwed on said male threaded portion, and means provided on top of said control rod for rotating said control rod.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |