A supercharged internal combustion engine according to the present invention includes a compressor 16a that supercharges intake air; an EGR passage 22 that connects an intake passage 12 at the upstream side of the compressor 16a and an exhaust passage 14; an EGR valve 26 that is provided in the EGR passage 22 and regulates the flow rate of EGR gas that flows through the EGR passage 22 by opening and closing the EGR passage 22; and a heat insulator 30 that is provided on a surface of the EGR valve 26 that is exposed to the EGR passage 22 which is located at the upstream side in the EGR gas flow with respect to a seal portion by a seal surface 26a1 and a valve seat 28a when the EGR valve 26 is in the fully closed position.

A mechanically attached thermal protection system (MATPS) includes an insulating tile having a top surface, a bottom surface, and a plurality of access holes that extend through the insulating tile from the top surface to the bottom surface. A plurality of brackets include a first end attached to the insulating tile and a second end including a mounting hole therethrough, the second end being positioned proximate the bottom surface of the insulating tile. A plurality of fasteners are positioned proximate the bottom surface of the insulating tile and at least partially positioned within one of the access holes so as to be accessible from the top surface of the insulating tile through one of the plurality of access holes. A MATPS including a plurality of air channels within the insulating tile and a method for sealing these air channels to those within an adjacent structure is also described herein.

A mechanically attached thermal protection system (MATPS) includes an insulating tile having a top surface, a bottom surface, and a plurality of access holes that extend through the insulating tile from the top surface to the bottom surface. A plurality of brackets include a first end attached to the insulating tile and a second end including a mounting hole therethrough, the second end being positioned proximate the bottom surface of the insulating tile. A plurality of fasteners are positioned proximate the bottom surface of the insulating tile and at least partially positioned within one of the access holes so as to be accessible from the top surface of the insulating tile through one of the plurality of access holes. A MATPS including a plurality of air channels within the insulating tile and a method for sealing these air channels to those within an adjacent structure is also described herein.

A system includes an exhaust gas an exhaust gas recirculation (EGR) mixer which includes a housing and a first passage in the housing. The first passage may be configured to supply an EGR flow into the housing. The system further includes a second passage in the housing, such that the second passage is disposed about the first passage. The second passage is configured to supply at least one fluid flow into the housing. The system also includes a region downstream from the first and second passages, and a fluid outlet downstream from the region.

A system includes an exhaust gas an exhaust gas recirculation (EGR) mixer which includes a housing and a first passage in the housing. The first passage may be configured to supply an EGR flow into the housing. The system further includes a second passage in the housing, such that the second passage is disposed about the first passage. The second passage is configured to supply at least one fluid flow into the housing. The system also includes a region downstream from the first and second passages, and a fluid outlet downstream from the region.

A system includes an exhaust gas an exhaust gas recirculation (EGR) mixer which includes a housing and a first passage in the housing. The first passage may be configured to supply an EGR flow into the housing. The system further includes a second passage in the housing, such that the second passage is disposed about the first passage. The second passage is configured to supply at least one fluid flow into the housing. The system also includes a region downstream from the first and second passages, and a fluid outlet downstream from the region.

A supercharged internal combustion engine according to the present invention includes a compressor 16a that supercharges intake air; an EGR passage 22 that connects an intake passage 12 at the upstream side of the compressor 16a and an exhaust passage 14; an EGR valve 26 that is provided in the EGR passage 22 and regulates the flow rate of EGR gas that flows through the EGR passage 22 by opening and closing the EGR passage 22; and a heat insulator 30 that is provided on a surface of the EGR valve 26 that is exposed to the EGR passage 22 which is located at the upstream side in the EGR gas flow with respect to a seal portion by a seal surface 26a1 and a valve seat 28a when the EGR valve 26 is in the fully closed position.

A supercharged internal combustion engine according to the present invention includes a compressor 16a that supercharges intake air; an EGR passage 22 that connects an intake passage 12 at the upstream side of the compressor 16a and an exhaust passage 14; an EGR valve 26 that is provided in the EGR passage 22 and regulates the flow rate of EGR gas that flows through the EGR passage 22 by opening and closing the EGR passage 22; and a heat insulator 30 that is provided on a surface of the EGR valve 26 that is exposed to the EGR passage 22 which is located at the upstream side in the EGR gas flow with respect to a seal portion by a seal surface 26a1 and a valve seat 28a when the EGR valve 26 is in the fully closed position.