Valve for the metered introduction of fuel vapor evaporated from a fuel tank of an internal combustion engine

Claim 1

A valve for a metered introduction of fuel vapor evaporated from a fuel tank of an internal combustion engine into an intake tube of the engine, comprising a valve housing, which has an inflow fitting (10) for connection to a ventilation fitting of the fuel tank or an adsorption filter for evaporated fuel vapors, that is connected to said fuel tank and has an outflow fitting for connection to the intake tube of an engine, a one-piece armature including a main body (25) with an end (34) which seats on a valve seat (54), said armature is provided inside the valve housing and moved by an electromagnet, said end (34) of said armature is pressed against the valve seat by a valve spring when the electromagnet is without current, thus closing a flow connection from the inflow fitting to the outflow fitting, and the end (34) of the armature passes the inflow opening, said armature opens said flow connection when the electromagnet is supplied with current, a V-shaped cross sectional area metering opening (56) that is controlled by the armature (25) is provided between the inflow fitting (10) and the valve seat (54), the metering opening (56) has cross sectional edges (75, 76) which are embodied so that with an increasing distance of the armature (25) from the valve seat (54), an increasingly greater cross sectional area of the metering opening (56) is unblocked by the armature (25), and only once the metering opening (56) is covered by said armature (25) does the armature (25) rest on the valve seat (54).