The invention provides a single radiator cooling system for use in hybrid electric vehicles, the system comprising a surface in thermal communication with electronics, and subcooled boiling fluid contacting the surface. The invention also provides a single radiator method for simultaneously cooling electronics and an internal combustion engine in a hybrid electric vehicle, the method comprising separating a coolant fluid into a first portion and a second portion; directing the first portion to the electronics and the second portion to the internal combustion engine for a time sufficient to maintain the temperature of the electronics at or below 175° C.; combining the first and second portion to reestablish the coolant fluid; and treating the reestablished coolant fluid to the single radiator for a time sufficient to decrease the temperature of the reestablished coolant fluid to the temperature it had before separation.

A system for recycling exhaust heat from an internal combustion engine is based on a recycling type of circulating a working fluid using the exhaust heat from the internal combustion engine. The system may include an EGR line configured to circulate a portion of exhaust gas generated from the internal combustion engine to an intake side, a working fluid circulation line configured to rotate a turbine with a working fluid vaporized by heat transferred from the EGR line, and an EGR side heat exchange unit configured to thermally connect the EGR line to the working fluid circulation line to cool an EGR gas by transferring heat from the EGR gas to the working fluid.

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 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 vapor/liquid separation feature configured to separate vapor present in the first cooling loop due to a leak between the first cooling loop and the second cooling loop. The first cooling loop also includes a pressure sensor configured to detect an increase in pressure in the first cooling loop that may result from a leak of second coolant into the first cooling loop.

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 vapor/liquid separation feature configured to separate vapor present in the first cooling loop due to a leak between the first cooling loop and the second cooling loop. The first cooling loop also includes a pressure sensor configured to detect an increase in pressure in the first cooling loop that may result from a leak of second coolant into the first cooling loop.

An internal combustion engine has evaporative cooling and waste heat utilization in a common vapor circulation system. The internal combustion engine includes a first exhaust gas heat exchanger. An evaporator system fluidly connected to the first exhaust gas heat exchanger is formed from a cooling jacket heat exchanger inside a housing for the evaporative cooling. A second exhaust gas heat exchanger is fluidly connected to the evaporator system. An expansion machine is fluidly connected to the second exhaust heat exchanger. A condenser is fluidly connected to the expansion machine. A feed pump is fluidly connected to the condenser. A third exhaust gas heat exchanger is disposed in an exhaust gas train. The first exhaust gas heat exchanger is fluidically connected to the second exhaust gas heat exchanger via the third exhaust gas heat exchanger and then via the cooling jacket heat exchanger.

A condensation cooling system for motor vehicles is presented. The system, in principal part, 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 part 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.

Methods and systems are provided for controlling coolant flow through parallel branches of a coolant circuit including an AC condenser and a charge air cooler. Flow is apportioned responsive to an AC head pressure and a CAC temperature to reduce parasitic losses and improve fuel economy. The flow is apportioned via adjustments to a coolant pump output and a proportioning valve.

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 cooling system for a prime mover is disclosed. The cooling system comprises at least one cooling jacket defined within a housing of the prime mover and receives refrigerant therein for cooling the prime mover. A compressor is in flow communication with an outlet port of the at least one cooling jacket and compresses refrigerant that flows from the outlet port of the at least one cooling jacket. A condenser is in flow communication with an outlet port of the compressor and discharges heat from refrigerant that is received from the compressor. An expansion device is in flow communication with an outlet port of the condenser at its inlet port and in flow communication with an inlet port of the at least one cooling jacket at its outlet port. The expansion device controls a flow of refrigerant from the condenser to the at least one cooling jacket is also disclosed.