A condensation cooling system for motor vehicles is presented. The system, in principal pan, comprises a liquid-to-liquid heat exchanger for circulating a first coolant, a coolant tank for circulating a second coolant, and a condensing panel or surface, where the condensing panel is pan of the coolant tank and also functions as a vehicle body panel. These components are arranged in two circuits, i.e. an engine cooling circuit in which a first coolant is circulated and a vapor condensing circuit in which a second coolant is circulated. The two cooling circuits are interconnected by the coolant tank where the heat exchanger is positioned within the coolant tank such that it is immersed in the second coolant. The coolant tank may also be equipped with pressure release valves, electric fans and diffuser plates to control pressure and manage air and vapor flow internally within the tank.

A heat exchanger unit for a fluid circuit of a motor vehicle includes a plurality of fluid connections for a through-flow of a working fluid, a fluid distributor fluidically connected to the fluid connections, and a fluid connector fluidically connected to the fluid connections. The fluid distributor is structured and arranged to distribute the working fluid among the fluid connections, and the fluid collector is structured and arranged to collect the working fluid after flowing through the fluid connection. At least a portion of the fluid distributor and/or the fluid collector includes a surge tank for the working fluid.

A split cycle internal combustion engine includes a combustion cylinder accommodating a combustion piston and a compression cylinder accommodating a compression piston. The engine also includes a controller arranged to receive an indication of a parameter associated with the combustion cylinder and/or a fluid associated therewith and to control an exhaust valve of the combustion cylinder in dependence on the indicated parameter to cause the exhaust valve to close during the return stroke of the combustion piston, before the combustion piston has reached its top dead centre position (TDC), when the indicated parameter is less than a target value for the parameter; and close on completion of the return stroke of the combustion piston, as the combustion piston reaches its top dead centre position (TDC), when the indicated parameter is equal to or greater than the target value for the parameter.

A connector for an engine cooling system is provided. The connecter may be located in a chamber with two inlets and an outlet. The connector may include a thermostatic valve. A temperature sensitive element may move the thermostatic valve between an open and closed position. A pressure relief valve may also be incorporated into the thermostatic valve. An engine cooling system comprising the connector is also provided.

A rankine cycle system includes: an internal combustion engine; a gas-liquid separator; a first pump; a steam generator; a superheater; an expander; a condenser; a first control valve; and a controller.

A pressure relief valve is opened from a first time to a second time for the purpose of reducing the pressure in the gas phase in a gas-liquid separator. A first water pump (WP) is driven at a third time and a fourth time. The third time and fourth time correspond to timings at which a difference between a boiling temperature and an actual temperature becomes equal to or greater than a predetermined temperature. Since liquid-phase coolant in a catch tank can be fed to another water pump by driving the first WP, the actual temperature of the liquid-phase coolant immediately upstream of the other water pump can be lowered. It is thus possible to prevent intense boiling of the liquid-phase coolant immediately upstream of the other water pump.

A rankine cycle system includes: an internal combustion engine; a gas-liquid separator; a first pump; a steam generator; a superheater; an expander; a condenser; a first control valve; and a controller.

A vehicle engine cooling system may include a high temperature radiator in which a high temperature coolant for cooling an engine by using ambient air flows, a low temperature radiator in which a low temperature coolant for cooling a water-cooled condenser by using ambient air flows, an integrated cooler configured to cool a low pressure EGR gas and air which has passed through a turbocharger, a high temperature radiator circulation line provided to allow the high temperature coolant to circulate the high temperature radiator, the engine, and the integrated cooler, a low temperature radiator circulation line provided to allow the low temperature coolant to circulate the low temperature radiator, the condenser, and the integrated cooler, and a plurality of control valves provided on the high temperature radiator circulation line and the low temperature radiator circulation line.