초록 ▼

The invention relates to a solenoid valve, particularly for controlling the brake pressure of a wheel brake of a slip-controllable hydraulic brake system of a motor vehicle. In known solenoid valves, there is a first hydraulically effective connection of an armature chamber of the solenoid valve to

The invention relates to a solenoid valve, particularly for controlling the brake pressure of a wheel brake of a slip-controllable hydraulic brake system of a motor vehicle. In known solenoid valves, there is a first hydraulically effective connection of an armature chamber of the solenoid valve to an outlet through the guide of a tappet in a valve insert. The first hydraulically effective connection ends in the form of a blind hole and thus does not permit flushing out gas bubbles which possibly have accumulated in the armature chamber. In order to solve this problem, the invention proposes a second hydraulically effective connection which is arranged away from the guide of the tappet, uncoupled from the first hydraulically effective connection. Thus, a closed pressure medium path is effected within a valve cartridge of the solenoid valve, the closed pressure medium path making possible an effective flushing of the armature chamber and thus a flushing out of gas bubbles.

대표청구항 ▼

1. A solenoid valve, comprising: at least one inlet and at least one outlet;a valve insert having a central bore;a tappet that is configured to move axially within the central bore of the valve insert, the tappet including a guide region within the central bore that guides the axial movement of the

1. A solenoid valve, comprising: at least one inlet and at least one outlet;a valve insert having a central bore;a tappet that is configured to move axially within the central bore of the valve insert, the tappet including a guide region within the central bore that guides the axial movement of the tappet;a valve element with a control cross-section, which is adjusted by axial movement of the tappet;a capsule that is anchored to the valve insert and which defines an armature chamber;an armature that is accommodated in the armature chamber and which is configured to actuate the tappet by moving axially in the armature chamber in response to a magnetic field generated around the armature;a first hydraulically effective connection provided between the armature chamber and the at least one outlet, the first hydraulically effective connection being embodied in the guide region of the tappet; andat least one second hydraulically effective connection of the armature chamber to the at least one outlet, the second hydraulically effective connection being embodied remote from the guide region of the tappet,wherein the at least one second hydraulically effective connection is embodied between an outer circumference of the valve insert and an inner circumference of the capsule. 2. The solenoid valve as recited in claim 1, wherein the at least one second hydraulically effective connection includes at least one longitudinal groove that is open toward an outside of the capsule and extends in an axial direction of the valve insert. 3. The solenoid valve as recited in claim 2, wherein the longitudinal groove is embodied on at least one of the outer circumference of the valve insert and the inner circumference of the capsule. 4. The solenoid valve as recited in claim 3, wherein: the valve insert includes at least one transverse bore that passes through a wall of the valve insert and defines the at least one outlet of the solenoid valve, andthe longitudinal groove extends axially from an end surface of the valve insert oriented toward the armature to a level of the least one transverse bore of the valve insert. 5. The solenoid valve as recited in claim 3, wherein the longitudinal groove has a cross section embodied as a segment of a circle, a rectangle, a triangle, or a polygon. 6. The solenoid valve as recited in claim 2, wherein: the valve insert includes at least one transverse bore that passes through a wall of the valve insert and defines the at least one outlet of the solenoid valve, andthe longitudinal groove extends axially from an end surface of the valve insert oriented toward the armature to a level of the least one transverse bore of the valve insert. 7. The solenoid valve as recited in claim 6, wherein the longitudinal groove has a cross section embodied as a segment of a circle, a rectangle, a triangle, or a polygon. 8. The solenoid valve as recited in claim 2, wherein the longitudinal groove has a cross section embodied as a segment of a circle, a rectangle, a triangle, or a polygon. 9. The solenoid valve as recited in claim 8, wherein the longitudinal groove has a groove depth that is greater than a groove depth of an annular groove that is embodied on the valve insert and belongs to a pressure-tight crimped connection between the capsule and the valve insert. 10. The solenoid valve as recited in claim 2, wherein the longitudinal groove constitutes an immediate and direct connection between the armature chamber and the outlet. 11. The solenoid valve as recited in claim 1, wherein the solenoid valve is embodied as a continuous control valve that is open when without electrical current. 12. A solenoid valve, comprising: at least one inlet and at least one outlet;a valve insert equipped with a tappet that is guided in sliding fashion;a valve element with a control cross-section that the tappet is able to control;a capsule that is anchored to the valve insert and delimits an armature chamber;an armature that is accommodated in moving fashion in the armature chamber and which actuates the tappet;a first hydraulically effective connection provided between the armature chamber and the outlet, which is embodied in the valve insert in a guide region of the tappet; andat least one second hydraulically effective connection of the armature chamber to the outlet is provided, which is embodied remote from the guide region of the tappet,wherein the at least one second hydraulically effective connection includes at least one longitudinal groove that is open toward an outside of the capsule and extends in an axial direction of the valve insert, andwherein the longitudinal groove has a groove depth that is greater than a groove depth of an annular groove that is embodied on the valve insert and belongs to a pressure-tight crimped connection between the capsule and the valve insert. 13. The solenoid valve as recited in claim 12, wherein the longitudinal groove constitutes an immediate and direct connection between the armature chamber and the outlet. 14. The solenoid valve as recited in claim 13, wherein the solenoid valve is embodied as a continuous control valve that is open when without electrical current. 15. A solenoid valve, comprising: at least one valve inlet and at least one valve outlet;a valve insert having a central bore;a tappet that is configured to move axially within the central bore of the valve insert, the tappet including a guide region within the central bore that guides the axial movement of the tappet;a valve element with a control cross-section, which is adjusted by axial movement of the tappet;a capsule that is anchored to the valve insert and which defines an armature chamber;an armature that is accommodated in the armature chamber and which is configured to actuate the tappet by moving axially in the armature chamber in response to a magnetic field generated around the armature;a first hydraulically effective connection provided between the armature chamber and the at least one valve outlet, the first hydraulically effective connection being embodied in the guide region of the tappet; andat least one second hydraulically effective connection of the armature chamber to the at least one valve outlet, the second hydraulically effective connection being embodied remote from the guide region of the tappet,wherein the first hydraulically effective connection receives fluid from a first fluid inlet and discharges the fluid from a first fluid outlet into the armature chamber, and the at least one second hydraulically effective connection receives the fluid from the armature chamber through a second fluid inlet and discharges the fluid to the at least one valve outlet from a second fluid outlet such that a hydraulic flow path is established from the first fluid inlet to the first fluid outlet through the armature chamber to the second fluid inlet and out of the second fluid outlet. 16. The solenoid valve as recited in claim 15, wherein the at least one second hydraulically effective connection is embodied between an outer circumference of the valve insert and an inner circumference of the capsule. 17. The solenoid valve as recited in claim 16, wherein the at least one second hydraulically effective connection includes at least one longitudinal groove that is open toward an outside of the capsule and extends in an axial direction of the valve insert. 18. The solenoid valve as recited in claim 17, wherein the longitudinal groove is embodied on at least one of an outer circumference of the valve insert and an inner circumference of the capsule. 19. The solenoid valve as recited in claim 18, wherein the longitudinal groove extends from an end surface of the valve insert oriented toward the armature to a level of at least one transverse bore that passes through a wall of the valve insert and constitutes the outlet of the solenoid valve. 20. The solenoid valve as recited in claim 17, wherein: the valve insert includes at least one transverse bore that passes through a wall of the valve insert and defines the at least one outlet of the solenoid valve, andthe longitudinal groove extends axially from an end surface of the valve insert oriented toward the armature to a level of the least one transverse bore of the valve insert.