Engine exhaust gas treatment device including electrically actuated hydrocarbon adsorber bypass valve
AssigneeGM Global Technology Operations LLC
InventorsHALIM G. SANTOSO, RANDY L. DUFRESNE
Life of this patent
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Abstract
An engine exhaust gas treatment device may include a housing, a hydrocarbon adsorber, an adsorber bypass passage, and a bypass valve assembly. The hydrocarbon adsorber may be located within the housing and may define a first flow path between an exhaust gas inlet and an exhaust gas outlet of the housing. The adsorber bypass passage may define a second flow path between the exhaust gas inlet and the exhaust gas outlet. The bypass valve assembly may include a bypass valve and an electric actuation mechanism engaged with the bypass valve. The bypass valve may be displaceable between open and closed positions by the electric actuation mechanism.
Claims20
An engine exhaust gas treatment device comprising:
- a housing defining an exhaust gas inlet and an exhaust gas outlet;
- a hydrocarbon adsorber located within the housing between the exhaust gas inlet and the exhaust gas outlet and defining a first flow path between the exhaust gas inlet and the exhaust gas outlet;
- an adsorber bypass passage within the housing between the exhaust gas inlet and the exhaust gas outlet and defining a second flow path between the exhaust gas inlet and the exhaust gas outlet, the first and second flow paths forming parallel flow paths between the exhaust gas inlet and the exhaust gas outlet;
- and
- a bypass valve assembly including a bypass valve and an electric actuation mechanism engaged with the bypass valve, the bypass valve located within the housing and displaceable between open and closed positions by the electric actuation mechanism, the bypass valve providing communication between the exhaust gas inlet and the exhaust gas outlet through the adsorber bypass passage when in the open position and inhibiting communication between the exhaust gas inlet and the exhaust gas outlet through the adsorber bypass passage when in the closed position.
An engine exhaust gas treatment device comprising:
- a housing defining an exhaust gas inlet and an exhaust gas outlet;
- a hydrocarbon adsorber located within the housing between the exhaust gas inlet and the exhaust gas outlet and defining a first flow path between the exhaust gas inlet and the exhaust gas outlet;
- an adsorber bypass conduit extending through the hydrocarbon adsorber and defining a second flow path between the exhaust gas inlet and the exhaust gas outlet, the first and second flow paths forming parallel flow paths between the exhaust gas inlet and the exhaust gas outlet;
- and
- a bypass valve assembly including a bypass valve and an electric actuation mechanism engaged with the bypass valve, the bypass valve located within the housing and displaceable between open and closed positions by the electric actuation mechanism, the bypass valve providing communication between the exhaust gas inlet and the exhaust gas outlet through the adsorber bypass conduit when in the open position and inhibiting communication between the exhaust gas inlet and the exhaust gas outlet through the adsorber bypass conduit when in the closed position.
Dependencies are inferred from the claim text.