Solenoid valve for an electrically controlled valve
AssigneeRobert Bosch GmbH
InventorsPeter Baumgartner, Eugen Drummer, Johannes Renner
Life of this patent
Estimating the term…
Abstract
A solenoid valve comprising a magnet armature which is embodied as having multiple parts and has an armature disk and an armature bolt. The magnet armature is guided in a slider. A damping device is provided in order to prevent post-pulse oscillation of the armature after a closing of the solenoid valve. The required short switching times of the solenoid valve can be exactly maintained with a device of this kind. The solenoid valve is designated for use in injection systems with a common rail.
Claims12
A solenoid valve (30) for controlling an injection valve of a fuel injection device, comprising an electromagnet (29) with a magnetic pole (61), a valve needle whose opening and closing are controlled by said electromagnet, an armature (28), and a valve closing member (25) that is moved with the armature and said valve closing member is acted on in a closing direction by a valve closing spring (31), said valve closing member cooperates with a valve seat (24), wherein the armature is moved in relation to an intermediary part embodied as an armature bolt (27), said intermediary part is connected to the valve closing member, a slider (34) fixedly disposed in the solenoid valve, said armature bolt (27) is guided to slide in said slider on movement of said armature bolt to a closed position of said valve closing member (25) though an action of its inertial mass away from a pole-end stop on the armature bolt (27), a damping device is provided, which cooperates with the armature and a stationary part, with which a post-pulse oscillation of the armature (28) is damped in a dynamic motion, the stationary part of the dampening device is an end face of the slider or a part supported in front of the slider and embodied as a disk, and the armature contacts with an end face when the armature is dynamically moved, and the armature is embodied as an armature plate that cooperates with the magnetic pole (61), with a first end face oriented toward the magnetic pole (61) of the electromagnet and a second end face oriented toward the stationary part, which, together with the stationary part, constitutes the dampening device.
Dependencies are inferred from the claim text.