Fuel injector system

Patent · 01 January 1988

OSTI ID:866765

Hsu, Bertrand D ^[1]; Leonard, Gary L ^[2]

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1. Erie, PA
2. Schenctady, NY

A fuel injection system particularly adapted for injecting coal slurry fuels at high pressures includes an accumulator-type fuel injector which utilizes high-pressure pilot fuel as a purging fluid to prevent hard particles in the fuel from impeding the opening and closing movement of a needle valve, and as a hydraulic medium to hold the needle valve in its closed position. A fluid passage in the injector delivers an appropriately small amount of the ignition-aiding pilot fuel to an appropriate region of a chamber in the injector's nozzle so that at the beginning of each injection interval the first stratum of fuel to be discharged consists essentially of pilot fuel and thereafter mostly slurry fuel is injected.

• Research Organization: GENERAL ELECTRIC CO
• DOE Contract Number: AC21-85MC22181
• Assignee: General Electric Company (Erie, PA)
• Patent Number(s): US 4782794
• OSTI ID: 866765
• Country of Publication: United States
• Language: English

Related Subjects

/123/239/
accumulator-type
adapted
amount
appropriate
appropriately
beginning
chamber
closed
closed position
closing
closing movement
coal
coal slurry
consists
consists essentially
delivers
discharged
essentially
fluid
fluid passage
fuel
fuel injection
fuel injector
fuels
hard
high-pressure
hold
hydraulic
ignition-aiding
impeding
injected
injecting
injecting coal
injection
injector
interval
medium
movement
needle
needle valve
nozzle
particles
particularly
particularly adapted
passage
pilot
pilot fuel
position
pressures
prevent
purging
purging fluid
region
slurry
slurry fuel
slurry fuels
stratum
thereafter
type fuel
utilizes
valve