US 2007/0108401 A1 · Actuator for controlling brake hydraulic pressure and solenoid valve thereof

Abstract

A solenoid valve for use in an actuator for controlling brake hydraulic pressure includes a valve housing, a movable core having an integral valve rod and axially slidably received in the valve housing, and a valve body configured to be moved into and out of contact with a valve seat when the valve body moves. The solenoid valve further includes a yoke having a U-shaped section. Even with such a U-shaped yoke, it is possible to form a magnetic path. Compared to tubular yokes, it is possible to reduce its width and thus the width of the solenoid valve by an amount equal to the thickness of tubular yokes. Thus, by arranging such solenoid valves in an actuator for controlling brake hydraulic pressure such that the width directions of the respective solenoid valves coincide with the height direction of the actuator, in which it is required to reduce the size of the actuator, it is possible to reduce its size in this direction. The flanges of the yoke have first ends that extend substantially along the outer peripheral edges of the coil winding to minimize the length of the flanges and thus the length of the solenoid valve.

Claims5

Dependent claims

A solenoid valve for an actuator for controlling brake hydraulic pressure, said solenoid valve comprising:

a yoke comprising a pair of parallel flanges each having first and second ends and a web connected to said second ends of said flanges, said yoke having a substantially U-shaped section;
a bobbin received in said yoke;
a current-excited coil wound around said bobbin, forming a coil winding;
a movable core provided inside said bobbin so as to be movable in an axial direction of said bobbin, and including a valve rod;
a valve body disposed at a free end of said valve rod;
and
a valve seat having a seating surface;
said valve body being configured to be moved into and out of contact with said seating surface of said valve seat when said movable core moves in the axial direction of said bobbin;
said flanges having a width that is greater than a diameter of said coil winding and smaller than the sum of the diameter of said coil winding and a thickness of said yoke;
said flanges each having said first end thereof extending substantially along an outer peripheral edge of said coil winding;
a plurality of said solenoid valves being configured to be mounted, independently of each other, in a housing of the actuator in a plurality of rows and a plurality of columns.

8 more elements

An actuator for controlling hydraulic brake pressure, said actuator comprising a housing and a plurality of solenoid valves mounted, independently of each other, in said housing so as to be arranged in a plurality of rows and a plurality of columns:

said solenoid valves each comprising:
a yoke comprising a pair of parallel flanges each having first and second ends and a web connected to said second ends of said flanges, said yoke having a substantially U-shaped section;
a bobbin received in said yoke;
a current-excited coil wound around said bobbin, forming a coil winding;
a movable core provided inside said bobbin so as to be movable in an axial direction of said bobbin, and including a valve rod;
a valve body disposed at a free end of said valve rod;
and
a valve seat having a seating surface;
said valve body being configured to be moved into and out of contact with said seating surface of said valve seat when said movable core moves in the axial direction of said bobbin;
said flanges having a length and a width that is perpendicular to said length, said width being greater than a diameter of said coil winding and smaller than the sum of the diameter of said coil winding and a thickness of said yoke;
said flanges each having said first end thereof extending substantially along an outer peripheral edge of said coil winding.
wherein said solenoid valves are arranged such that the length directions of said flanges of said yokes thereof coincide with each other.

9 more elements

Dependencies are inferred from the claim text.

Actuator for controlling brake hydraulic pressure and solenoid valve thereof

Life of this patent

Actuator for controlling brake hydraulic pressure and solenoid valve thereof

Life of this patent

Abstract

Claims5