An EGR cooler has tubes (3) and a shell (1) for enclosing the tubes (3). Cooling water (9) is supplied into and discharged from the shell (1) and exhaust gas (10) from a diesel engine is guided into each of the tubes (3) so as to conduct heat exchange of t...

An automotive exhaust assembly taps incompletely gases and returns these to the motor, resulting in higher exhaust temperatures. The exhaust system is therefore fitted with a heat exchanger to lower the temperature of the exhaust assembly. The heat exchang...

An exhaust gas heat exchanger, comprising first wings (111c) projected in a first direction orthogonal to the circulating direction of EGR gas and second wings projected in a direction orthogonal to the circulating direction of the EGR gas and different fr...

The engine has an exhaust gas re-circulation (EGR) line, an EGR valve arranged in the line to control an EGR amount and a controller to control the valve. The EGR controller performs control of scavenging the line by opening the valve at the time of reduci...

Outer (4), middle (3) and inner (2) tubes are arranged to define between the outer (4) and middle (3) tubes a first cylindrical space (20) and between the middle (3) and inner (2) tubes a second cylindrical space (11). The inner tube (2) has a third cylind...

A water-cooled exhaust gas re-circulation device according to the invention has a hole-open/close mechanism allowing communication with outside air is arranged at a cooling water re-circulation passage cooling an exhaust gas re-circulation valve. A drain b...

The invention relates to an EGR cooler in which cooling water is supplied into and discharged from a shell, exhaust gas being passed through tubes from one of hoods to the other hood for thermal exchange of the exhaust gas with the cooling water, and is di...