A floating valve for air ventilation mounted in a vent hose connected to a surge tank of a vehicle cooling system includes: an upper port including a first hollow, wherein an upper end portion of the first hollow is connected to the vent hose; a lower port including a second hollow, wherein a lower end portion of the second hollow is connected to the vent hose at a location facing the upper port; a structure portion provided to connect the upper port and the lower port to each other in fluidical communication with the upper port and the lower port; and a floating ball provided to be movable inside the structure portion so that the floating ball floats to seal an opening of the first hollow in the upper port when cooling fluid flows into the structure portion.

A floating valve for air ventilation mounted in a vent hose connected to a surge tank of a vehicle cooling system includes: an upper port including a first hollow, wherein an upper end portion of the first hollow is connected to the vent hose; a lower port including a second hollow, wherein a lower end portion of the second hollow is connected to the vent hose at a location facing the upper port; a structure portion provided to connect the upper port and the lower port to each other in fluidical communication with the upper port and the lower port; and a floating ball provided to be movable inside the structure portion so that the floating ball floats to seal an opening of the first hollow in the upper port when cooling fluid flows into the structure portion.

A vehicle includes a vehicle cooling system for cooling a cabin and a battery system, each having a respective target operating range. The cooling system is configured to select among a cabin-only mode, battery-only mode, or a hybrid cooling mode for cooling the cabin and the battery system. In the hybrid mode, the system determines a desired pressure at an inlet of a compressor corresponding to a suction pressure of the compressor, to avoid cooling interruptions. The system generates a control signal based on the desired suction pressure, and applies the control signal to the compressor. Generating the control signal may include generating a feedforward signal the desired suction pressure, generating a feedback signal based on the suction pressure, or a combination thereof. For example, the use of hybrid mode based on suction pressure allows smoother response to targets with reduced delays in response in meeting the cooling demands.

A vehicle includes a vehicle cooling system for cooling a cabin and a battery system, each having a respective target operating range. The cooling system is configured to select among a cabin-only mode, battery-only mode, or a hybrid cooling mode for cooling the cabin and the battery system. In the hybrid mode, the system determines a desired pressure at an inlet of a compressor corresponding to a suction pressure of the compressor, to avoid cooling interruptions. The system generates a control signal based on the desired suction pressure, and applies the control signal to the compressor. Generating the control signal may include generating a feedforward signal the desired suction pressure, generating a feedback signal based on the suction pressure, or a combination thereof. For example, the use of hybrid mode based on suction pressure allows smoother response to targets with reduced delays in response in meeting the cooling demands.

A hybrid-vehicle cooling apparatus includes a radiator, a plurality of serial-connection cooling components serially disposed to be sequentially supplied with a refrigerant discharged from the radiator, a plurality of parallel-connection cooling components disposed to be in parallel supplied with the refrigerant flowing through the plurality of serial-connection cooling components, and an electric motor mounted in a serial-refrigerant-flow section formed by the plurality of serial-connection cooling components.

A hybrid-vehicle cooling apparatus includes a radiator, a plurality of serial-connection cooling components serially disposed to be sequentially supplied with a refrigerant discharged from the radiator, a plurality of parallel-connection cooling components disposed to be in parallel supplied with the refrigerant flowing through the plurality of serial-connection cooling components, and an electric motor mounted in a serial-refrigerant-flow section formed by the plurality of serial-connection cooling components.

A battery pack includes a battery module group including a plurality of battery modules, a coolant layer configured to allow a coolant to circulate, and a refrigerant layer configured to allow a refrigerant to circulate. The coolant layer includes a first surface and a second surface opposite to the first surface. The refrigerant layer includes a third surface and a fourth surface opposite to the third surface. The first surface of the coolant layer is closer to the battery module group than the second surface of the coolant layer. The third surface of the refrigerant layer is closer to the battery module group than the fourth surface of the refrigerant layer. The battery module group is arranged along the first surface of the coolant layer. At least part of the coolant layer is arranged between the refrigerant layer and the battery module group in a plan view.

A battery pack includes a battery module group including a plurality of battery modules, a coolant layer configured to allow a coolant to circulate, and a refrigerant layer configured to allow a refrigerant to circulate. The coolant layer includes a first surface and a second surface opposite to the first surface. The refrigerant layer includes a third surface and a fourth surface opposite to the third surface. The first surface of the coolant layer is closer to the battery module group than the second surface of the coolant layer. The third surface of the refrigerant layer is closer to the battery module group than the fourth surface of the refrigerant layer. The battery module group is arranged along the first surface of the coolant layer. At least part of the coolant layer is arranged between the refrigerant layer and the battery module group in a plan view.

A utility vehicle is provided, comprising a plurality of ground engaging members. A frame is supported by the plurality of ground engaging members, and the frame comprises a first frame portion extending generally rearwardly and upwardly from a front portion of the frame, a second frame portion extending generally rearwardly and downwardly from the first frame portion, and a third frame portion extending rearwardly from the second frame portion. An electric powertrain is supported by the frame, and the electric powertrain comprises a first motor longitudinally aligned with at least a portion of the first frame portion and a second motor longitudinally aligned with at least a portion of the third frame portion. The electric powertrain also includes a battery operably coupled to each of the first motor and the second motor, and the battery is longitudinally aligned with at least a portion of the second frame portion.

A utility vehicle is provided, comprising a plurality of ground engaging members. A frame is supported by the plurality of ground engaging members, and the frame comprises a first frame portion extending generally rearwardly and upwardly from a front portion of the frame, a second frame portion extending generally rearwardly and downwardly from the first frame portion, and a third frame portion extending rearwardly from the second frame portion. An electric powertrain is supported by the frame, and the electric powertrain comprises a first motor longitudinally aligned with at least a portion of the first frame portion and a second motor longitudinally aligned with at least a portion of the third frame portion. The electric powertrain also includes a battery operably coupled to each of the first motor and the second motor, and the battery is longitudinally aligned with at least a portion of the second frame portion.