Turbocharger wastegate assembly
AssigneeFca US LLC
InventorsSrikanth Jonnalagedda, Lurun Zhong
Life of this patent
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Abstract
A turbocharger includes a housing, a turbine wheel, a bypass channel formed in the housing, a wastegate assembly having a valve and configured to selectively allow a flow of exhaust gas to bypass the turbine wheel via the bypass channel, and a wastegate outer housing having an aperture fluidly coupled to the bypass channel, and an outer valve seating surface, the valve configured to selectively seat against the outer valve seating surface over the aperture. A shroud extends outwardly from the wastegate outer housing and is configured to direct the bypass exhaust gas flow toward a catalytic converter.
Claims16
A turbocharger for a vehicle, comprising:
- a housing;
- a turbine wheel;
- a bypass channel formed in the housing;
- a wastegate assembly having a valve and configured to selectively allow a flow of exhaust gas to bypass the turbine wheel via the bypass channel;
- a wastegate outer housing having an aperture fluidly coupled to the bypass channel, and an outer valve seating surface, the valve configured to selectively seat against the outer valve seating surface over the aperture;
- and
- a shroud extending outwardly from the wastegate outer housing, the shroud configured to direct the bypass exhaust gas flow toward a catalytic converter such that the bypass exhaust gas flow is uniformly spread across a catalyst of the catalytic converter,
- wherein the shroud includes a ramped surface disposed at an angle ‘α’ relative to a longitudinal axis of the bypass channel, and
- wherein the angle ‘α’ is between approximately 30° and approximately 60°.
A turbocharger for a vehicle, comprising:
- a housing;
- a turbine wheel;
- a bypass channel formed in the housing;
- a wastegate assembly having a valve and configured to selectively allow a flow of exhaust gas to bypass the turbine wheel via the bypass channel;
- a wastegate outer housing having an aperture fluidly coupled to the bypass channel, and an outer valve seating surface, the valve configured to selectively seat against the outer valve seating surface over the aperture;
- and
- a plurality of flow deflectors extend outwardly from the wastegate outer housing, the plurality of flow deflectors configured to direct the bypass exhaust gas flow toward a catalytic converter such that the bypass exhaust gas flow is uniformly spread across a catalyst of the catalytic converter.
A turbocharger system for a vehicle, comprising:
- an exhaust system having a catalytic converter, which includes a catalyst;
- and
- a turbocharger including:
- a housing;
- a turbine wheel;
- a bypass channel formed in the housing;
- a wastegate assembly having a valve and configured to selectively allow a flow of exhaust gas to bypass the turbine wheel via the bypass channel;
- and
- a wastegate outer housing having an aperture fluidly coupled to the bypass channel, and an outer valve seating surface, the valve configured to selectively seat against the outer valve seating surface over the aperture;
- a shroud extending outwardly from the wastegate outer housing;
- and
- a plurality of flow deflectors extending outwardly from the wastegate outer housing;
- wherein the shroud and the plurality of flow deflectors are each configured to direct the bypass exhaust gas flow toward the catalytic converter such that the bypass exhaust gas flow is uniformly spread across the catalyst of the catalytic converter.
Dependencies are inferred from the claim text.