A cooling system for a hybrid vehicle that cools cooling medium for an air conditioner without reducing a driving performance, irrespective of a running condition. A detector detects data relating to operating conditions of a high-current device cooling circuit, a supercharger cooling circuit, a high-current device, an engine, a supercharger, and the hybrid vehicle. A controller selects one of a first water passage and a second water passage by manipulating a control valve based on the data collected by the detector, in such a manner as to maximize an amount of heat transferred from the cooling medium to high-current device cooling water or supercharger cooling water.

A cooling system includes a first cooling loop, a second cooling loop and a heat exchanger configured to transfer heat from the first cooling loop to the second cooling loop. The first cooling loop includes a flow restrictor, an inertial separator, and a pressure relief valve cooperating to effect diversion of vapor present in the first cooling loop due to a leak between the first cooling loop and the second cooling loop.

In one embodiment, a method for cooling an engine damper, including converting a gas to a liquid, and cooling an engine damper by passing the liquid through a tube portion located between fan air flow and the engine damper.

In one embodiment, a method for cooling an engine damper, including converting a gas to a liquid, and cooling an engine damper by passing the liquid through a tube portion located between fan air flow and the engine damper.

An engine assembly is provided with a split-cycle internal combustion engine having a compression section and an expansion section and with a cooling circuit for circulating a heat-exchange fluid; said fluid has a boiling temperature such that at least a fraction of the fluid changes phase from liquid to vapour flowing through the expansion section of the engine, when the latter operates in steady conditions; the circuit comprises a turbine arranged downstream of the engine so as to receive vapour and produce mechanical energy from the expansion of the vapour.

A fluid phase change thermal management cooling method and apparatus for removing heat from a source of heat, the method comprising the steps of: filling a cooling chamber with volume V1 of a fluid phase change thermal management cooling apparatus with a fluid in its liquid phase; increasing the volume of the cooling chamber to volume V2 to va-pourise a portion of the fluid from its liquid phase to its vapour phase such that there is substantially only the fluid in its liquid phase and fluid in its vapour phase within the volume V2; allowing a dwell time that provides for at least some of the fluid in its liquid phase that has contact with a heated surface of the cooling chamber to be vaporised; and repeating the steps where timing of the steps and dwell time between steps is selected to control heat build-up within selected limits.

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 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.

An engine cooling system, capable of reducing vehicle weight caused by employing a Rankine cycle and capable of improving Rankine cycle performance, including some inlet-side cooling water of a radiator is used as a heating source for a first evaporator and some outlet-side cooling water of a sub-radiator is used as a cooling source for a condenser, a coolant that has passed through an expander, a second evaporator, and a compressor in a cooling cycle for an air conditioner, vaporized, cooled and liquefied by passing through a side to be cooled of the condenser in the Rankine cycle.

A cooling device for an internal combustion engine including: an ebullient cooling system in which a refrigerant cools the internal combustion engine by boiling in the internal combustion engine, and a rankine cycle system including a superheater that superheats the refrigerant discharged from the internal combustion engine, a turbine to which the refrigerant discharged from the superheat is supplied, and a condenser that condenses the refrigerant discharged from the turbine; wherein the rankine cycle system includes a supply path that supplies a liquid-phase refrigerant discharged from the condenser to a shaft part of the turbine, and a first supply part of the condenser to which the refrigerant discharged from the turbine is supplied is arranged higher than the shaft part of the turbine in a gravity direction.