Hydraulic block for a hydraulic unit of a hydraulic vehicle braking system
A hydraulic block for a hydraulic unit of a hydraulic power vehicle braking system that includes a slip control. The hydraulic block includes in an upper side a plug connection for a connecting nipple of a brake fluid reservoir. A check valve is integrated into the plug connection.
1. A hydraulic block for a hydraulic unit of a hydraulic vehicle braking system, the hydraulic block comprising:
a check valve situated in a plug connection, the plug connection being formed by a hole in an upper side of the hydraulic block and into which a connecting nipple of a brake fluid reservoir is pluggable for connection to the plug connection when the brake fluid reservoir is situated at the upper side; and
the plug connection includes a tubular collar surrounded by an annular space that is in the plug connection and into which the connecting nipple projects when the connecting nipple is plugged into the plug connection.
2. The hydraulic block as recited in claim 1 , wherein the check valve is located at least partially within the connecting nipple of the brake fluid reservoir when the connecting nipple is plugged into the plug connection.
3. The hydraulic block as recited in claim 1 , wherein the check valve includes a valve spring, which is supported at an annular step in the plug connection, a valve seat member, which is situated in the plug connection, and a shut-off body, which is acted upon by the valve spring against a valve seat of the valve seat member.
4. The hydraulic block as recited in claim 1 , wherein the collar is surrounded by an annular gap in the connecting nipple of the brake fluid reservoir when the connecting nipple is plugged into the plug connection.
5. The hydraulic block as recited in claim 1 , wherein a line, which connects the plug connection for the brake fluid reservoir to a receptacle for a test valve and/or to a main brake cylinder bore and/or to a power cylinder bore in the hydraulic block, intersects the annular space surrounding the collar in the plug connection tangentially or in a secant direction or opens axially parallel into the annular space surrounding the collar in the plug connection.
6. The hydraulic block as recited in claim 1 , wherein the annular space surrounding the collar in the plug connection is produced using a crowning cutter or core drill.
7. The hydraulic block as recited in claim 1 , wherein the hydraulic block includes a main brake cylinder bore and/or a power cylinder bore.
8. A hydraulic block for a hydraulic unit of a hydraulic vehicle braking system, the hydraulic block comprising:
a valve seat;
a check valve that is situated in a plug connection and that is axially shiftable relative to the plug connection to thereby contact the valve seat, the plug connection being formed by a hole in an upper side of the hydraulic block and into which a connecting nipple of a brake fluid reservoir is pluggable for connection to the plug connection when the brake fluid reservoir is situated at the upper side; and
a screen or filter that is situated stationarily in the plug connection such that the screen of filter is not axially shifted by the axial shifting of the check valve.