Valve for the metered introduction of evaporated fuel
AssigneeRobert Bosch GmbH
InventorsErwin Krimmer, Wolfgang Schulz, Tilman Miehle, Manfred Zimmermann, Maria Esperilla
Life of this patent
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Abstract
A fuel tank ventilation valve for a Laval nozzle, which has a sensitive regulation of the through flow quantity. The valve has a valve seat which is embodied on a valve seat body which has at least one opening that can be closed by the valve member. A cross section of the at least one opening is embodied as essentially smaller than an entry cross section of the Laval nozzle that is disposed spaced apart from the valve seat. The valve is suited for a metered introduction of fuel that has evaporated from a fuel tank of a mixture-compressing internal combustion engine with externally supplied ignition into an intake tube of the engine.
Claims16
A valve for a metered introduction of fuel evaporated from a fuel tank of an internal combustion engine into an intake tube of the engine, comprising a valve housing with a valve longitudinal axis, said valve housing has an inflow fitting for connection to a fuel tank or an adsorption filter following the fuel tank that is for the passage of the evaporated fuel, an outflow fitting for connection to the intake tube, a valve member which is accommodated on an inside of the valve housing between the inflow fitting and the outflow fitting, said valve member is actuated by an electromagnet that has a magnet core and cooperates with a valve seat embodied on a valve seat body, a nozzle embodied in the outflow fitting, said nozzle has a convergently embodied part and a divergently embodied part, the valve seat (37) and an entry cross section (60) of the nozzle (55) have a spacing from each other in a direction of the valve longitudinal axis (2).
Dependencies are inferred from the claim text.