Apparatus and Method for Reducing Fouling of Exhaust Gas Recirculation Cooler
AssigneesHyundai Motor Company, Kia Corporation
InventorJune Hwan Jang
Life of this patent
Estimating the term…
Abstract
An embodiment apparatus for reducing fouling of an exhaust gas recirculation (EGR) cooler includes an exhaust gas transfer part configured to connect a diesel oxidation catalyst (DOC) of an exhaust gas post-treatment system extending from an engine through an exhaust line to an EGR cooler installed in an EGR line and configured to recirculate exhaust gas discharged from an exhaust manifold to an intake manifold, a valve installed in the exhaust gas transfer part, and a controller configured to selectively open the valve as the exhaust gas post-treatment system enters a predetermined diesel particulate filter (DPF) regeneration condition and allow exhaust gas discharged from the DOC to be supplied to the EGR cooler through the exhaust gas transfer part.
Claims20
An apparatus for reducing fouling of an exhaust gas recirculation (EGR) cooler, the apparatus comprising:
- an exhaust gas transfer part configured to connect a diesel oxidation catalyst (DOC) of an exhaust gas post-treatment system extending from an engine through an exhaust line to an EGR cooler installed in an EGR line and configured to recirculate exhaust gas discharged from an exhaust manifold to an intake manifold;
- a valve installed in the exhaust gas transfer part;
- and
- a controller configured to selectively open the valve as the exhaust gas post-treatment system enters a predetermined diesel particulate filter (DPF) regeneration condition and allow exhaust gas discharged from the DOC to be supplied to the EGR cooler through the exhaust gas transfer part.
A method of reducing fouling of an exhaust gas recirculation (EGR) cooler, the method comprising:
- determining whether a temperature of exhaust gas discharged from a diesel oxidation catalyst (DOC) exceeds a predetermined temperature as a signal according to an entry of a diesel particulate filter (DPF) regeneration condition is input from an exhaust gas post-treatment system;
- determining an opening degree condition of an EGR valve when it is determined the temperature of the exhaust gas exceeds the predetermined temperature;
- controlling a valve to be opened and allowing the temperature of the exhaust gas exceeding the predetermined temperature to be supplied to the EGR cooler through an exhaust gas transfer part when it is determined that the EGR valve is in a blocked state;
- allowing regeneration of a supply pipe of the exhaust gas of the EGR cooler and re-determining the opening degree condition of the EGR valve as the exhaust gas is supplied to the EGR cooler;
- and
- controlling the valve to block a supply of the exhaust gas toward the EGR cooler through the exhaust gas transfer part when it is determined that the EGR valve is in an opened state.
An apparatus for reducing fouling of an exhaust gas recirculation (EGR) cooler, the apparatus comprising:
- an exhaust gas post-treatment system comprising a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and a selective catalytic reduction (SCR) sequentially disposed along a flow of an exhaust gas;
- an exhaust gas transfer part connected to a rear end of the DOC and configured to recirculate the exhaust gas discharged from an exhaust manifold to an intake manifold;
- a valve installed in the exhaust gas transfer part and configured to allow the exhaust gas generated at the rear end of the DOC to move to an EGR cooler through selective opening and closing;
- and
- a controller configured to selectively open the valve as the exhaust gas post-treatment system enters a predetermined DPF regeneration condition and allow the exhaust gas discharged from the DOC to be supplied to the EGR cooler through the exhaust gas transfer part.
Dependencies are inferred from the claim text.