Exhaust gas recirculation device
AssigneeMahle International GmbH
InventorRafael Weisz
Life of this patent
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Abstract
An exhaust gas recirculation device for an internal combustion engine, in particular in a motor vehicle, includes a recirculation line and a fresh gas line section. A Venturi nozzle is designed in an inlet area of the fresh gas line section. The recirculation line opens into the fresh gas line section in a low pressure area of the Venturi nozzle. The Venturi nozzle has a variable flow cross section to allow exhaust gas recirculation in the largest possible operating range of the internal combustion engine.
Claims12
An exhaust gas recirculation device for an internal combustion engine (1), in particular in a motor vehicle
- having at least one recirculation line (7),
- having a fresh gas line section (8) in which a Venturi nozzle (10) is designed in an inlet area (9), the Venturi nozzle (10) having at least one adjustable wall section (21) which is adjustable with regard to its distance with respect to an opposite wall section (22), and
- having a cut-off valve (32) with a valve seat (35) for blocking and opening the at least one recirculation line (7),
- whereby the at least one recirculation line (7) opens into the fresh gas line section (8) through a mouth opening (33) disposed in a low pressure range (11) of the Venturi nozzle (10), wherein the Venturi nozzle (10) has a variable flow cross section and wherein the mouth opening (33) of the recirculation line (7) and the valve seat (35) of the cut-off valve (32) are arranged in the wall section (22) opposing the adjustable wall section (21) of the Venturi nozzle (10).
An exhaust gas recirculation device for an internal combustion engine (1), in particular in a motor vehicle
- having at least one recirculation line (7) with a mouth section (38) having a mouth opening (33) open axially in a direction of flow (23), and
- having a fresh gas line section (8) in which a Venturi nozzle (10) is designed in an inlet area (9), the Venturi nozzle (10) having a variable flow cross section,
- wherein the at least one recirculation line (7) opens into the fresh gas line section (8) in a low pressure range (11) of the Venturi nozzle (10) and the mouth section (38) of the recirculation line (7) is arranged within the fresh gas line section (8) such that the mouth section (38) ends free or contactless in the fresh gas line section (8).
An exhaust gas recirculation device for an internal combustion engine, the exhaust gas recirculation device comprising:
- a) a fresh gas line section having an inlet area;
- b) a Venturi nozzle having a variable flow cross section disposed in said inlet area of said fresh gas line section, said Venturi nozzle comprising an adjustable wall section and an opposite wall section, said adjustable wall section being movable with respect to said opposite wall section;
- c) a recirculation line opening into said fresh gas line section at a mouth opening, said mouth opening disposed in a low pressure range of said Venturi nozzle;
- and
- d) a cut-off valve having a valve seat for blocking and opening said recirculation line;
- wherein said mouth opening and said valve seat are disposed in said opposite wall section.
Dependencies are inferred from the claim text.