EGR COOLER AND EGR COOLER DEVICE USING THE SAME

摘要

An EGR cooler and an EGR cooler device includes a pre-cooler which is located at a central region at which a cooling water chamber of an EGR cooler housing, in which cooling water circulates, is divided into two spaces, and in which hot exhaust gas introduced from an exhaust system is discharged as primary-cooled exhaust gas via heat-exchange with the cooling water. Therefore, it may be possible to reduce costs by a decrease in number of EGR tubes via optimal primary cooling performance for the exhaust gas in the pre-cooler and particularly to relieve damage by a thermal load generated due to the hot exhaust gas by fully surrounding an inlet and an outlet of the pre-cooler with the circulating cooling water.

主权项

1. An EGR cooler comprising:
an EGR cooler housing including a cooling water chamber in which cooling water circulates, introduced from the outside and then discharged to the outside; a pre-cooler in which hot exhaust gas introduced from an exhaust system is discharged as primary-cooled exhaust gas via heat-exchange with the cooling water, the pre-cooler including a space blocked from the cooling water, the pre-cooler being located at a central region at which the cooling water chamber is divided into two upper and lower spaces; and an EGR tube including an upper EGR tube and a lower EGR tube which are respectively located in the upper and lower spaces divided by the pre-cooler, and in which the primary-cooled exhaust gas is converted into secondary-cooled EGR gas via heat-exchange with the cooling water in each of the upper EGR tube and the lower EGR tube.