Abstract: An automatic recharge system (22) is provided for a transcritical cooling system (10). The recharge system (22) includes a refrigerant container (30) capable of storing a refrigerant charge at a higher pressure that can be accommodated on the low pressure side of the cooling system (10), and a control valve (34) connected between an outlet (36) of the container (30) and the low pressure side of the cooling system (10) to automatically control the release of refrigerant form the refrigerant container (30) for circulation in the cooling system (10).

Abstract: Thermal and pressure related fatigue or stress in the header plates (26, 28) of a charge air cooler is avoided in a structure wherein the header plates (26, 28) are formed of a channel having a central web (80) flanked by legs (82, 84) and provided with apertures (86) for receiving the ends of tubes (36). The apertures (86), on the side thereof between the legs (82, 84), are provided with peripheral flanges (88, 90, 92, 94) and on the opposite side are substantially surrounded by concave camming surfaces (96, 98).

Abstract: In order to eliminate components and fixtures, facilitate assembly, avoid leaks, and reduce cost in a heat exchanger for exchanging heat between two fluids such as a coolant and oil, the heat exchanger includes a header plate having a central opening defined by a column integrally formed with the header plate together with a radial opening. A plurality of heat exchange units are stacked on the header plate. The heat exchange units each comprise a pair of plates joined together at inner and outer peripheral edges to thereby sealingly define a plurality of first chambers for the flow of one of the fluids wherein a column-receiving opening is provided radially inwardly of the first chambers thereof.