Electromagnetically operated valve

US5341787A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Sebastian Zabeck · Weinheim, DE
• Andreas Sausner · Frankfurt am Main, DE

Key dates

• Filing date: Sep 1, 1993
• Grant date: Aug 30, 1994
• Expiry date: Sep 1, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M25/0836
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An electromagnetically operated valve for the clocked feeding of volatile fuel constituents out of the free space of a fuel tank into the intake manifold of an internal combustion engine is disclosed. The valve is provided with at least one intake port and at least one outlet port, a main valve seat and an auxiliary valve seat connected parallel to the main valve seat being provided between the intake and the outlet ports. A corresponding main closing element and an auxiliary closing element are provided, the main closing element having a movable mass m.sub.I and the auxiliary closing element having a movable mass m.sub.II. The closing elements sealingly contact the corresponding valve seats in a sealed (off) position through the force of at least one valve spring at any one time. 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 likewise shiftable to an open position by a resultant force F.sub.resI. The ratio F.sub.resI /m.sub.I is smaller than ratio F.sub.resII /m.sub.II.