Electromagnetic valve and unit-type fuel injection device using the same
AssigneeZexel Corporation
InventorAtsushi Ueda
Life of this patent
Estimating the term…
Abstract
An unit-type fuel injection device including a plunger for pressurizing fuel in a fuel pressurizing chamber, an injection nozzle which has a fuel reservoir and serves to inject the fuel pressurized in the fuel pressurizing chamber, and an electromagnetic valve which has a valve plug and serves to intercept fuel supply to the fuel pressurizing chamber, wherein the valve plug of the electromagnetic valve is provided with an intercommunication hole through which the fuel pressurizing chamber and the fuel reservoir of the injection nozzle intercommunicate with each other when the valve plug intercepts the fuel supply to the fuel pressurizing chamber.
Claims15
An electromagnetic valve including:
- a fluid reservoir through which a fluid supply hole and a fluid return hole intercommunicate with each other;
- and
- a valve plug which is provided in said fluid reservoir and serves to block intercommunication between said fluid reservoir and a first chamber, wherein said valve plug is provided with an intercommunication hole therein through which said first chamber and a second chamber intercommunicate with each other when said valve plug blocks the intercommunication between said fluid reservoir and said first chamber.
An electromagnetic valve including:
- an accommodating hole which houses at least a portion of said electromagnetic valve;
- a fluid reservoir through which a fluid supply hole and a fluid return hole intercommunicate with each other;
- and
- a valve plug which is disposed in said fluid reservoir and serves to block intercommunication between said fluid reservoir and a first chamber, wherein said valve plug is provided with an intercommunication hole therein through which said first chamber and a second chamber intercommunicate with each other when said valve plug blocks the intercommunication between said fluid reservoir and said first chamber, and further wherein said fluid reservoir and said accommodating hole are positioned relative to each other such that at least one coil of said electromagnetic valve is kept substantially free of fuel.
An unit-type fuel injection device having a fuel pressurizing chamber, including:
- a plunger which pressurizes fuel in said fuel pressurizing chamber;
- an injection nozzle which has a fuel reservoir and serves to inject the fuel pressurized in said fuel pressurizing chamber;
- and
- an electromagnetic valve which has a valve plug and serves to block fuel supply to said fuel pressurizing chamber, wherein said valve plug of said electromagnetic valve is disposed in said fuel reservoir, and is provided with an intercommunication hole therein through which said fuel pressurizing chamber and said fuel reservoir of said injection nozzle intercommunicate with each other when said valve plug blocks the fuel supply to said fuel pressurizing chamber.
An electromagnetic valve including:
- a fluid reservoir which intercommunicates with at least one fuel supply and return hole;
- a first fuel chamber for pressurizing fuel;
- and
- a second fuel chamber for discharging the pressurized fuel;
- and
- a valve plug which is disposed in said fluid reservoir at one end portion thereof so as to be movable upwardly and downwardly and selectively allows said fluid reservoir and said first fuel chamber to intercommunicate with each other in accordance with the upward and downward movement thereof, wherein said valve plug has therein an intercommunication hole through which said first fuel chamber and said second fuel chamber intercommunicate with each other when the intercommunication between said fluid reservoir and said first fuel chamber is blocked by said upwardly and downwardly movably valve plug, and said intercommunication hole, said fluid reservoir and said second fuel chamber intercommunicate with one another at said one end portion of said valve plug.
Dependencies are inferred from the claim text.