| 摘要 |
<p>An electromagnetic hydraulic valve (1), in particular proportional valve, for controlling a device for the rotational angle adjustment of a camshaft relative to a crankshaft of an internal combustion engine, composed of an electromagnet (2) with a hollow-cylindrical magnet housing (4), at least one coil winding (5), an axially moveable magnet armature (6), a first and a second pole shoe (7, 8), a valve part (3) with a hollow-cylindrical valve housing (9) having a control piston (12) which can be moved axially by the magnet armature (6) of the electromagnet (2) via a plunger rod (11). The invention consists of a sleeve (17), composed of a base (18) and a hollow-cylindrical side wall (19), which is arranged on that end of the control piston (12) and situated in the direction of the plunger rod (11), where the sleeve (17) has a greater hardness than the control piston (12).</p> |
