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An electromagnetic fuel injection control valve positioned inside a fuel injector, i.e. a unit injector, for providing fast response and high pressure capability while minimizing the size and complexity of the injector. The control valve includes a valve housing having a supply inlet and fuel outlet

An electromagnetic fuel injection control valve positioned inside a fuel injector, i.e. a unit injector, for providing fast response and high pressure capability while minimizing the size and complexity of the injector. The control valve includes a valve housing having a supply inlet and fuel outlet, a center tube having a center passage and an annular valve seat, a control valve sleeve slidably mounted on the center tube and an actuator assembly having a coil spring, a stator and an armature. The control valve sleeve moves between an open position permitting fuel to flow between the supply inlet and the fuel outlet and a closed position which sealingly engages the annular valve seat for blocking the flow of fuel between the supply inlet and the fuel outlet. The coil spring biases the control valve sleeve in an open position and is positioned around the center tube. The stator is also axially positioned around the center tube and includes multiple poles. The armature connects to the control valve sleeve and reciprocates when solenoid is activated to allow for high pressure fuel injection into the combustion chamber of an internal combustion engine.

대표청구항 ▼

A fuel injection control valve, comprising: a valve housing including a fuel supply inlet and a fuel outlet; a center tube positioned within said housing and including a center passage for delivering fuel from said supply inlet to said fuel outlet, and an annular valve seat; a control valve sleeve s

A fuel injection control valve, comprising: a valve housing including a fuel supply inlet and a fuel outlet; a center tube positioned within said housing and including a center passage for delivering fuel from said supply inlet to said fuel outlet, and an annular valve seat; a control valve sleeve slidably mounted on said center tube for movement between an open position permitting flow between said supply inlet and said fuel outlet and a closed position sealingly engaging said annular valve seat for blocking flow between said supply inlet and said fuel outlet; and an actuator means for moving said control valve sleeve between said open and said closed positions, said actuator means including a biasing means positioned around said center tube for biasing said control valve sleeve towards said open position and an electromagnetic means including a stator having a central cavity and an armature connected to said control valve sleeve, said stator including a plurality of poles angularly spaced around said central cavity and at least three coils, each of said at least three coils encircling a respective one of said plurality of poles, said control valve sleeve extending into said central cavity.