EP0331198A2
Expired / Lapsed
EP
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Accumulator type fuel injection nozzle
Assignee: Yamaha Motor Co Ltd
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Filing: 1989-03-03
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Granted: —
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Expires: 2009-03-03
Abstract
Abstract An accumulator type fuel injection nozzle (11) including a resistor (74) in the actuating electromagnet (56) of the relief valve (51) for controlling the operation of the valve. In the illustrated embodiment, there are provided two electromagnets (59,66), one of which opens the relief valve (51) and the other of which closes the relief valve (51). In addition, a thermistor (76) is provided in the circuit to the electromagnet so as to render the device substantially temperature insensitive.
Inventors
- 👤 Jun Taue
- 👤 Takeo Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:35
CPC Classifications
F; F02; F02M; F02M63/00; F02M63/0012; F02M63/0059; F02M63/0063; F02M47/00; F02M47/02; F02M47/027; F02M51/00; F02M51/005; F02M63/0014; F02M63/0015; F02M63/0017; F02B; F02B2275/00; F02B2275/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
190 words
An accumulator type of injection nozzle comprised of an accumulator chamber adapted to be supplied with high pressure fuel, a nozzle port leading from said accumulator chamber, an injector valve moveable between a closed position and a opened position for controlling the discharge of fuel from said accumulator chamber through said nozzle port, a control chamber for receiving pressurized fuel, an actuating member supported for movement within said control chamber and associated with said injector valve for retaining said injector valve in its closed position when said control chamber is pressurized and for movement of said injector valve to is opened position when pressure is relieved in said control chamber, and relief valve means moveable between a closed position for maintaining pressure in said control chamber and an opened position of relieving said control chamber for reffecting fuel discharge through said nozzle port, the improvement comprising electromagnetic means associated with said relief valve means for urging said relief valve means to one of its positions when said electromagnetic means is energized, and electrical resistor means in circuit with said electromganetic means for varying the force exerted by said electromagnetic means.
Claim 2
Dependent Claim
190 words
An accumulator type of injection nozzle comprised of an accumulator chamber adapted to be supplied with high pressure fuel, a nozzle port leading from said accumulator chamber, an injector valve moveable between a closed position and a opened position for controlling the discharge of fuel from said accumulator chamber through said nozzle port, a control chamber for receiving pressurized fuel, an actuating member supported for movement within said control chamber and associated with said injector valve for retaining said injector valve in its closed position when said control chamber is pressurized and for movement of said injector valve to is opened position when pressure is relieved in said control chamber, and relief valve means moveable between a closed position for maintaining pressure in said control chamber and an opened position of relieving said control chamber for reffecting fuel discharge through said nozzle port, the improvement comprising electromagnetic means associated with said relief valve means for urging said relief valve means to one of its positions when said electromagnetic means is energized, and electrical resistor means in circuit with said electromganetic means for varying the force exerted by said electromagnetic means.
Claim 3
Dependent Claim
36 words
An accumulator type of injection nozzle as set forth in claim 1 further including thermistor means in circuit with said electrical resistor means and said electromagnetic means for rendering the system substantially insensitvie to temperature variations.
Claim 4
Dependent Claim
31 words
An accumulator type of injection nozzle as set foth in claim 2 wherein the resistor means and the thermistor means is positioned in a fuel chamber of the fuel injection nozzle.
Claim 5
Dependent Claim
36 words
An accumulator type of injection nozzle as set forth in claim 1 further including thermistor means in circuit with said electrical resistor means and said electromagnetic means for rendering the system substantially insensitive to temperature variations.
Claim 6
Dependent Claim
42 words
An asccumulator type of injection nozzle as set forth in claim 1 further including second electromagnetic means associated with said relief valve means for urging said relief valve means to the other of its positions when said second electromagnetic means is energized.
Claim 7
Dependent Claim
35 words
An accumulator type of injection nozzle as set forth in claim 5 further including second electrical resistor means in circuit with the second electromagnetic means for varying the force exerted by said second eletromagnetic means.
Claim 8
Dependent Claim
36 words
An accumulator type of injection nozzle as set forth in claim 6 further including at least one thermistor in electrical circuit with at least one of said electrical resistor means for rendering the device temperature insensitive.
Claim 9
Dependent Claim
30 words
An accumulator type of injection nozzle as set forth in claim 7 wherein the resistor means and the thermistor is positioned within a fuel chamber of the fuel injection nozzle.
Claim 10
Dependent Claim
30 words
An accumulator type of injection nozzle as set forth in claim 7 wherein there are a pair of thermistors each in circuit with a respective one of the electrical resistors.
Claim 11
Dependent Claim
23 words
An accumulator type of injection nozzle as set forth in claim 9 wherein both of the thermistors are in the same fuel chamber.
Claim 12
Dependent Claim
29 words
An accumulator type of injection nozzle as set forth in claim 5 wherein the relief valve means inlcudes a permanent magnet interposed between the armatures of the two electromagnets.
Claim 13
Dependent Claim
35 words
An accumulator type of injection nozzle as set forth in claim 11 further including second electrical resistor means in circuit with the second electromagnetic means for varying the force exerted by said second electromagnetic means.
Claim 14
Dependent Claim
36 words
An accumulator type of injection nozzle as set forth in claim 12 further including at least one thermistor in electrical circuit with at lest one of said electrical resistor means for rendering the device temperature insensitive.
Claim 15
Dependent Claim
30 words
An accumulator type of injection nozzle as set forth in claim 13 wherein the resistor means and the thermistor is positioned within a fuel chamber of the fuel injection nozzle.
Claim 16
Dependent Claim
30 words
An accumulator type of injection nozzle as set forth in claim 13 wherein there are a pair of thermistors each in circuit with a respective one of the electrical resistors.
Claim 17
Dependent Claim
23 words
An accumulator type of injection nozzle as set forth in claim 15 wherein both of the thermistors are in the same fuel chamber.
References Cited (Backward Citations)
No citation records indexed.
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