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| United States Patent | 4836454 |
| Link to this page | http://www.wikipatents.com/4836454.html |
| Inventor(s) | Gaskell; David J. (Sudbury, GB2) |
| Abstract | A fuel injection nozzle of the inwardly opening type includes a valve
member which is biased into contact with a seating by a spring. The valve
member is surrounded in part by a sleeve and both the valve member and
sleeve are subject to fuel pressure so that axial forces are produced
which act in opposition to the spring. When the forces are large enough
the valve member and sleeve move but the sleeve movement and hence the
movement of the valve member, is limited by a stop. Fuel is allowed to
flow through an outlet at a restricted rate and only when the fuel
pressure rises is the valve member moved further to allow unrestricted
flow of fuel. The further movement of the valve member is limited by the
engagement of an abutment on the valve member with the end of the sleeve. |
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Title Information  |
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| Publication Date |
June 6, 1989 |
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| Filing Date |
March 17, 1988 |
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| Priority Data |
Mar 21, 1987[GB]8706757 |
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Title Information |
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References |
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| Market Size |
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Estimate the gross annual revenues of the relevant market
sector:
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| Market Share |
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| Reasonable Royalty |
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What percentage of gross sales should the inventor or assignee be paid?
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Public's "Guesstimation" of Royalty Value
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| Market Size | N/A | [No votes] | | x | Market Share | N/A | [No votes] | | x | Reasonable Royalty | N/A | [No votes] |
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Market Review |
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Technical Review |
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Claims |
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I claim:
1. A fuel injection nozzle for supplying fuel to an internal combustion
engine comprising a valve member movable axially by fuel under pressure
supplied through a fuel inlet, away from a seating to permit fuel flow
from the inlet to an outlet, the valve member being slidable within a
sleeve, and subject to the fuel pressure at said inlet, the sleeve being
slidable in a bore in a nozzle body, a spring abutment engageable by the
valve member, a coiled compression spring engaging the spring abutment for
biasing the valve member into contact with the seating, the sleeve also
being engageable with the spring abutment whereby when fuel under pressure
is supplied through said inlet the force produced by the fuel pressure
acting on the sleeve will cause the sleeve to engage the spring abutment
to assist the movement of the valve member against the action of the
spring, stop means for limiting the movement of the sleeve under the
action of fuel pressure and abutment means on the valve member for
engaging with the sleeve to limit further movement of the valve member
away from the seating after the movement of the sleeve has been arrested
by the stop means.
2. A fuel injection nozzle according to claim 1 in which said stop means
comprises a stop plate located against the end of the nozzle body said
stop plate being engageable by a surface on said sleeve.
3. A fuel injection nozzle according to claim 1 in which said abutment
means comprises a collar formed on the valve member.
4. A fuel injection nozzle according to claim 1 in which said abutment
means comprises a ring retained upon the valve member.
5. A fuel injection nozzle according to claim 4 in which said ring is
located against a step defined on the valve member.
6. A fuel injection nozzle according to claim 2, in which said abutment
means comprises a collar formed on the valve member.
7. A fuel injection nozzle according to claim 2 in which said abutment
means comprises a ring retained upon the valve member.
8. A fuel injection nozzle according to claim 7 in which said ring is
located against a step defined on the valve member. |
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Claims |
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Description |
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