Abstract: A valve can be incorporated as an integral part of the heat exchanger as a plug-in item that can be located anywhere desired between the inlet and outlet flow manifolds of the heat exchanger.

Abstract: A heat exchanger, turbulizer or heat transfer surface, and a method of making same wherein the turbulizer is a corrugated member having parallel, spaced-apart ridges and planar fins extending therebetween. The planar fins have spaced-apart apertures with opposed peripheral edge portions including transversely extending flanges.

Abstract: A method and system for cooling a pressurized charge air in the fuel cell system of a vehicle, using first and second charge air coolers. The system further includes a gas-to-gas humidifier and a fuel cell stack. According to the method and system, cathode exhaust gas passes through the gas-to-gas humidifier and is also used as the coolant gas in the first charge-air cooler. Therefore, the fuel cell cathode exhaust is heated and reduced in water content, reducing the tendency of water in the exhaust to condense and pool underneath the vehicle. Also provided is a three-fluid heat exchanger which integrates the first and second charge air coolers.

Abstract: An annular heat exchanger for cooling hot gases comprises an inner shell, an intermediate shell and an outer shell. Where the heat exchanger is integrated with a catalytic converter for treatment of hot exhaust gases in a motor vehicle, the inner shell contains a catalyst for treatment of the exhaust gases. Inner and outer gas flow passages are provided between the shells, and a coolant flow passage is provided, either on the outer surface of the outer shell, or inbetween the intermediate and outer shells. The exhaust gases change direction twice as they pass through the heat exchanger, and the annular structure of the heat exchanger provides a large surface area, and a large flow section, relative to volume, and thereby provides effective heat exchange without significantly increasing space requirements.

Abstract: A heat exchanger apparatus containing a heat exchanger and a thermally actuated bypass valve. The heat exchanger having plurality of plates defining a first, a second and a bypass channels. A first fluid inlet manifold in fluid communication with the first and the bypass channels. The bypass valve positioned in the first fluid inlet manifold, and containing a sleeve having a first slot and a second slot, that permit fluid flow from a first fluid inlet to the bypass channel and to the first fluid inlet manifold, respectively. A drum positioned within the sleeve and movable from a first position to a second position. The drum having an aperture permitting first fluid flow to the first slot in the first position and to the second slot in the second position. An actuator engaging the drum and actuating it to move from the first position to the second position.

Abstract: A low profile, split flow charge air cooler with uniform flow exit manifold comprises a first heat exchanger core comprising a plurality of gas flow passages and a plurality of coolant flow passages arranged in alternating order. First and second gas outlet manifolds are in communication with the gas flow passages, and a gas inlet manifold is in communication with both the first and second gas outlet manifolds. The gas inlet manifold is located between the first and second gas outlet manifolds, such that the gas flows in two different directions from the inlet manifold toward the outlet manifolds. A gas outlet chamber receives the gas flows from the gas outlet manifolds and provides a space in which the gas flows are combined before being discharged from the heat exchanger.