Apparatus for treating the exhaust gas of an internal combustion engine
AssigneeHyundai Motor Company
InventorsIn Tak Kim, Cha Ri Myung, Yong Sub Kim
Life of this patent
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Abstract
An apparatus for treating the exhaust gas of internal combustion engine comprises an injector, a valve for shutting off the cooling water which flows into a cylinder head, an exhaust manifold increasing the fluidity of the exhaust gas, a close-coupled catalyst (CCC) increasing the activation of a catalyst with high loading operation in case of low temperate, an HC-absorber catalyst including an HC absorber and a TWC catalyst component for removing the HC component in the exhaust gas, and a electrically heated catalyst and a light off catalyst for removing the HC component at high temperate.
Claims15
An apparatus for treating the exhaust gas of internal combustion engine comprising:
- an injector;
- a valve for shutting off the cooling water which flows into a cylinder head;
- an exhaust manifold increasing the fluidity of the exhaust gas, a close-coupled catalyst for increasing the activation of a catalyst during high loading operation in case of low temperature;
- an HC-absorber catalyst including an HC absorber and a TWC catalyst component for removing the HC component in the exhaust gas;
- and
- an electrically heated catalyst and a light off catalyst for removing the HC component at high temperature, said electrically heated catalyst being located downstream of the HC-absorber catalyst.
An apparatus for treating the exhaust gases of an internal combustion engine, the apparatus comprising:
- a valve for controlling cooling water which flows into a cylinder head of the internal combustion engine;
- an exhaust manifold for coupling to the engine and for receiving exhaust gases from said engine;
- a close-coupled catalyst coupled to the exhaust manifold for receiving the exhaust gases and for increasing the activation of a catalyst during high loading operation of the engine at low temperatures below normal engine operating temperature;
- an hydrocarbon catalyst coupled to the exhaust manifold for receiving and treating the exhaust gases, the hydrocarbon catalyst comprising an hydrocarbon absorber and a three-way catalytic converter;
- and
- a heated catalyst and a light off catalyst coupled to the exhaust manifold for removing hydrocarbon components from the exhaust gases at high temperature, wherein the heated catalyst is coupled to the exhaust manifold downstream from the hydrocarbon catalyst for receiving exhaust gases treated by the hydrocarbon catalyst.
A method for treating exhaust gases of an internal combustion engine comprising the steps of:
- controlling the temperature of an engine cylinder head by controlling the flow of water to the cylinder head;
- treating exhaust gases in a close-coupled catalyst;
- receiving exhaust gases from the close-coupled catalyst in a hydrocarbon catalyst;
- treating the exhaust gases received in the hydrocarbon catalyst with an hydrocarbon absorber and a three-way catalytic converter;
- heating a catalyst;
- and
- receiving treated exhaust gases from the hydrocarbon catalyst in the heated catalyst.
Dependencies are inferred from the claim text.