| 主权项 |
1. Hydraulic support element (1.1, 1.2, 1.3, 1.4) for a valve drive of a combustion engine, with a pot cylindrical casing (2) and a hollow cylindrical piston (3) guided axially movably therein, the inner end (7) of which is supported via a spring (8) on the bottom wall (9) of the casing (2), whose outer end (10) projects past the outer margin (11) of the casing (2) and is formed as a hemispherical bearing head (12), and whose inner space (6) is subdivided by means of a partition element (13) into an axially inner supply-pressure space (15) and an axially outer switching-pressure space (14), wherein the supply-pressure space (15) can be connected via a non-return valve (16) to a high-pressure space (17) enclosed between the inner end (7) of the piston (3) and the bottom wall (9) of the casing (2), and wherein the switching-pressure space (14) is connected via a central bore (18) arranged in the bearing head (12) to a switching-pressure line of a switchable rocker arm, comprising:
formation of the partition element (13) as a pot cylindrical cap (25.1-25.4) which, in the inner space (6) of the piston (3) with axially outward directed bottom wall (26) in an inner cylindrical section (27) of the side wall (20) of the piston (3), is pressed in until it is in contact with a radially inner constriction (28) thereof; a ventilation opening (30) which is arranged largely centered in the bottom wall (26) of the cap (25.1-25.4) and whose cross section does not exceed a predetermined limit cross-sectional area; and an inner recess (31) in the bottom wall (26) of the cap (25.1-25.4), which is arranged centered and which includes the area of the ventilation opening (30). |
