Solenoid valve and fuel injection valve having the same

Details Solenoid valve and fuel injection valve having the same Solenoid valve and fuel injection valve having the same

2011-05-17

2011-05-17

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Including solenoid

C239S585100, C335S299000

Reexamination Certificate

active

07942381

ABSTRACT:
A solenoid valve includes a movable core, a magnetic opposed portion opposed to the movable core, a nonmagnetic cylindrical portion, a first magnetic cylindrical portion axially close to the movable core, and a second magnetic cylindrical portion located radially outside of the magnetic opposed portion. The nonmagnetic cylindrical portion surrounds radially outside of a gap between the magnetic opposed portion and the movable core. A coil is provided radially outside of the nonmagnetic cylindrical portion. A thickness t of the nonmagnetic cylindrical portion, a cross-sectional area S1of the magnetic opposed portion, and a total cross-sectional area S2of both the magnetic opposed portion and the second magnetic cylindrical portion having the thickness t satisfy the relationships of t≦0.6 mm and 0.55≦(S1/S2).

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