Pressure regulating solenoid valve
OwnerMichel Marechal, Frederic Sauvage +4inventors
InventorsMichel Marechal, Frederic Sauvage, Alexis Menand, Alain Amand, Nicolas Cezon, Peter Voigt
Life of this patent
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Abstract
A solenoid valve which regulates the pressure in a pressurized fuel injection system includes a body containing a needle that is pressed by an electromagnet including a coil and a magnetic core. The core has a cavity that is in fluid communication via an internal channel with a counterbore in the body into which the needle protrudes and into which fuel flows during use. The core also has a restriction which restricts the fluid communication and which attenuates pressure waves propagating in the fuel to prevent the waves from moving the core.
Claims8
1-7. (canceled)
A solenoid valve which regulates the pressure in a pressurized fuel injection system, the solenoid valve comprising:
- a body;
- a needle contained in the body such that the needle slides between a closed position and an open position;
- an electromagnet which presses the needle, the electromagnet including a coil rigidly connected to the body and a magnetic core that is movable axially between a first position in which the magnetic core presses the needle into the closed position and a second position in which the needle is free to move to the open position, the magnetic core having a cavity that is in fluid communication via an internal channel with a counterbore in the body into which the needle protrudes and into which fuel flows during use, the core also having means for restricting said fluid communication to attenuate pressure waves propagating in the fuel and to prevent said pressure waves from moving the magnetic core.
Dependencies are inferred from the claim text.