Apparatus for introducing a reducing agent into the exhaust of an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsMichael Offenhuber, Franz Lackner, Johann Siller, Olivier Marco, Rainer Reiter
Life of this patent
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Abstract
An apparatus for introducing a reducing agent into the exhaust of an internal combustion engine, having a reservoir, a delivery unit, and a flow path for the reducing agent. The apparatus also has a ventilation device for ventilating the flow path and is situated at a geodetic high point of the flow path and even in the closed state, permits a return of a minimal fluid quantity to the reservoir.
Claims19
An apparatus for introducing a reducing agent containing urea into the exhaust of an internal combustion engine, the apparatus comprising
- a reservoir,
- a delivery unit,
- a flow path for the reducing agent, the flow path leading from the reservoir to the delivery unit, the delivery unit delivering the reducing agent from the reservoir through the flow path,
- a ventilation device for ventilating at least one region of the flow path, the ventilation device being disposed in the flow path leading from the reservoir to the delivery unit and being situated at a geodetic high point of the flow path,
- a ventilation opening in the ventilation device that always permits a return of a minimal fluid quantity to the reservoir, and
- a ventilation return line connecting the ventilation opening and the reservoir.
An apparatus for introducing a reducing agent containing urea into the exhaust of an internal combustion engine, the apparatus comprising
- a reservoir,
- a delivery unit,
- a flow path for the reducing agent, the flow path leading from the reservoir to the delivery unit, the delivery unit delivering the reducing agent from the reservoir through the flow path,
- a ventilation device for ventilating at least one region of the flow path, the ventilation device being disposed in the flow path leading from the reservoir to the delivery unfit and being situated at a geodetic high point of the flow path,
- a ventilation opening in the ventilation device that always permits a return of a minimal fluid quantity to the reservoir, and
- a ventilation return line connecting the ventilation opening and the reservoir, wherein the ventilation device comprises a float valve.
Dependencies are inferred from the claim text.