Electromagnetically operated valve

An electromagnetically operated valve for the clocked feeding of volatile fuel components out of the free space of a fuel tank into the intake manifold of an internal combustion engine, comprising:

• at least one inlet port and at least one outlet port;
• a main valve seat, and a corresponding main closing element having a movable mass m.sub.I ;
• an auxiliary valve seat, and a corresponding auxiliary closing element having a movable mass m.sub.II connected parallel to the main valve seat, said valve seats being located between the inlet and the outlet ports;
• and
• at least one valve spring for urging each of the closing elements into sealing contact with the corresponding valve seats in an off position through the force of the at least one valve spring at a given time;
• whereby the main closing element, when actuated, is shiftable to an open position by a resultant force F.sub.resI and the auxiliary closing element is shiftable to an open position by a resultant force F.sub.resII, such that the ratio F.sub.resI /m.sub.I is smaller than the ratio F.sub.resII /m.sub.II, and the ratio of the spring energy to the rate of build-up of opening force for the auxiliary closing element is smaller than the same ratio with respect to the main closing element.

An electromagnetically operated valve for the clocked feeding of volatile fuel components out of the free space of a fuel tank into the intake manifold of an internal combustion engine, comprising:

• at least one inlet port and at least one outlet port;
• a main valve seat, and a corresponding main closing element having a movable mass m.sub.I ;
• an auxiliary valve seat, and a corresponding auxiliary closing element having a movable mass m.sub.II connected parallel to the main valve seat, said valve seats being located between the inlet and the outlet ports;
• and
• at least one valve spring for urging each of the closing elements into sealing contact with the corresponding valve seats in an off position through the force of the at least one valve spring at a given time;
• whereby the main closing element, when actuated, is shiftable to an open position by application of an opening force F.sub.openingI and the auxiliary closing element is shiftable to an open position by application of an opening force F.sub.openingII, such that the ratio F.sub.openingI /m.sub.I is smaller than the ratio F.sub.opening II /m.sub.II.