A air conditioning control device is configured to estimate whether or not the temperature of refrigerant on a high-pressure side in a heat pump device is equal to or lower than a predetermined low temperature and to switch a flow path switching device to ...

A system for compensating a heating performance a motor vehicle with a CVT, wherein the system includes a coolant-temperature sensor for sensing an engine-coolant temperature, and a transmission ECU electronically linked to the CVT and the coolant-temperat...

The air conditioning unit operates on the carbon dioxide cold vapor process, in which carbon dioxide is circulated in closed circuit by a compressor (3) to a heat exchanger (2) and back. The heat exchanger is fixed to the powertrain unit. The heat exchange...

The vehicle heating system comprises a stand-alone heater (14) using the same fuel as the vehicle. This heats a liquid and a heat exchanger (12) transfers heat from the liquid into air passing into the vehicle. A valve system allows the heated liquid to pa...

An air conditioning apparatus includes a valve (17) for selectively introducing the coolant discharged from a compressor (1) to either a flow path for a water-coolant heat exchanger (11) or another flow path to avoid the heat exchanger, a thermostat (15) f...