A heat management system for vehicles comprises: a first circulation circuit which cools an engine body of an internal combustion engine and includes a first pump for pressure-feeding a refrigerant; a second circulation circuit including an exhaust heat recovery apparatus for recovering exhaust heat from the internal combustion engine, a heater core used for air-conditioning of a vehicle, and a second pump for pressure-feeding the refrigerant; communication passages allowing the first circulation circuit to communicate with the second circulation circuit; and an on-off valve provided in the first communication passage, and switching between the communication between the first circulation circuit and the second circulation circuit and the preventing of communication therebetween, wherein the on-off valve is controlled such that the refrigerant temperature of the first circulation circuit is higher than that of the second circulation circuit.

A control apparatus in a cooling system has an opening schedule of a degree of opening of each of a plurality of outflow ports in a control valve including at least a heater cut mode, a heater passing water mode, a fully closed mode, and a switching mode in which the opening and closing of an air conditioning outflow port is switched in a state in which at least one outflow port of a radiator outflow port and a bypass outflow port is opened and switches the heater cut mode and the heater passing water mode via the switching mode.

The control apparatus includes a heater configured to generate heat to heat the internal combustion engine, a controller configured to control a heat exchange system in such a way as to transfer EV exhaust heat to the internal combustion engine, and an controller configured to let electrical power be supplied from a battery to the heater before the internal combustion engine is started if it is predicted that a specific warmed-up condition of the internal combustion engine will not be established before the start of the internal combustion engine and not to let electrical power be supplied from a battery to the heating if it is predicted that a specific warmed-up condition of the internal combustion engine will be established before the start of the internal combustion engine.

A cooling apparatus includes: a water circuit; a ventilation heat exchanger that heats cooling water by heat exchange with air discharged to outside; a motor generator cooling unit; a motor bypass circuit that bypasses the motor generator cooling unit; and a flow rate control unit. When a temperature of the cooling water flowing between the ventilation heat exchanger and a motor flow rate controller is lower than or equal to a temperature of oil circulating inside the motor generator, the flow rate control unit increases a flow rate of the cooling water that flows from the ventilation heat exchanger into the motor bypass circuit.

Systems and methods for heating and cooling a vehicle using a heat pump are disclosed herein. In one embodiment, a system for heating and cooling the vehicle includes a heat pump having: a compressor located in an engine compartment of the vehicle, and an evaporator located in a sleeper or a cab of the vehicle. The system also includes a controller for selecting a cooling mode or a heating mode for the heat pump.

A method of rapidly increasing a temperature within a hybrid vehicle includes receiving an on input from a temperature control system after the vehicle engine has been turned on. In response to receiving the on input, an ambient temperature, a coolant temperature, and a battery state of charge are detected. When the ambient temperature is less than a predetermined threshold, the coolant temperature is less than a predetermined threshold, and the battery SOC is less than a predetermined threshold, a charge mode of the vehicle is changed to a charge increasing mode to thus increase the coolant temperature.

Systems and methods for heating and cooling a vehicle using a heat pump are disclosed herein. In one embodiment, a system for heating and cooling the vehicle includes a heat pump having: a compressor located in an engine compartment of the vehicle, and an evaporator located in a sleeper or a cab of the vehicle. The system also includes a controller for selecting a cooling mode or a heating mode for the heat pump. In one embodiment, the system includes a clutch for engaging the compressor with a transmission of the vehicle.

A vehicle warm-up control apparatus includes: a motor; an inverter; an electric storage device; a boost converter connected to a low-voltage-side power line and a high-voltage-side power liner; and a control unit for controlling the inverter and the boost converter, the boost converter including a first switching device as an upper arm, a second switching device as a lower arm, and a reactor. Further, the second switching device is composed of a semiconductor device variable in resistance value, and when warm-up is requested, the control unit executes warm-up control to set the resistance value of the second switching device higher than the resistance value during operation when the warm-up is not requested, and supply heat generated in the second switching device by passing current through the second switching device to a device for which the warm-up is requested.

A coolant heater for a vehicle includes: a housing unit having an inlet part through which a coolant is introduced and an outlet part through which the coolant is discharged; a baffle assembly provided in an internal space of the housing unit and having a first flow path through which the coolant flows in a first direction and a second flow path through which the coolant, passing through the first flow path, flows in a second direction different from the first direction; a first heater part provided in the first flow path; and a second heater part provided in the second flow path. The coolant heater makes it possible to obtain an advantageous effect of improving a fast-acting heating performance and heating efficiency.

Methods and systems are provided for heating a cabin of a vehicle using an alternator of the vehicle. In one example, a method may include operating in a first operating mode to heat a cabin of a vehicle, the first operating mode including shorting an alternator output of an alternator of the vehicle to ground, and closing a coolant valve positioned between a coolant system of an engine of the vehicle and an alternator coolant circuit.