Patent ID: 11953116
Assignee: HAMANAKODENSO CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B  Y | IPC F

Claim 0:
1. An electromagnetic valve, comprising:
a coil which is magnetized if energized;
a core which is arranged in a magnetic circuit of the coil;
a plunger which is arranged in the magnetic circuit of the coil opposed to the core via a magnetic gap;
a valve member which is movable with the plunger;
a valve body which includes an inflow passage of working fluid, an outflow passage of the working fluid, a normally close valve seat which is formed between the inflow passage and the outflow passage and contacts valve member, and a pressure relief passage communicating the inflow passage and the outflow passage by bypassing the normally close valve seat;
a normally close compression spring which urges the valve member toward a side to the normally close valve seat; and
a pressure relief valve which is arranged in the pressure relief passage in the valve body, closes the pressure relief passage, if a pressure of the working fluid in the outflow passage is lower than, is equal to, and is higher by a pressure difference less than a predetermined relief pressure than a pressure of the working fluid in the inflow passage, and opens the pressure relief passage, if the pressure of the working fluid in the outflow passage is higher by a pressure difference equal to or higher than the relief pressure than a pressure of the working fluid in the inflow passage.