To provide an electromagnetic valve capable of reducing an amount of fluctuation in pressure differential relative to a fluctuation in a flow rate.
A conical portion 404a is provided at the tip of a main valve element 404. In such a structure, when a flowing brake fluid hits the conical portion 404a of the main valve element 404, the brake fluid is bounced back at substantially the same angle that it hits the conical surface of the conical portion 404a. However, a movement direction of the bounced brake fluid is not largely inclined from a direction where the brake fluid is to be caused to flow. Therefore, flow resistance gets smaller than on a spherical surface and the fluid can smoothly flow. Further, since generatrices of the conical portion 404a agree with tangent lines to the spherical surface and a boundary area between the spherical surface and the conical surface is continuous without a step, the brake fluid is rectified by these surfaces when it flows. Therefore, it is possible to reduce the amount of fluctuation in pressure differential relative to the fluctuation in the flow rate of the brake fluid.
YABUKI YUJI
DENSO CORP
JP2002347597A | 2002-12-04 | |||
JP2008175267A | 2008-07-31 | |||
JPS4614776B |