GM Volt 실도로 운행 조건에서의 냉난방 시스템 제어 특성 연구

Experiments of electrical air conditioning system for GM Volt(PHEV, Plug-in Hybrid Electric Vehicle) has been performed with the variation of operating conditions. To control temperature in the cabin, GM Volt applying electric drive system has electrical air conditioning system, such as the electric-driven compressor and coolant heating PTC heater. In this study, the electrical air conditioning system layout of GM Volt was founded and temperature control logic in the cabin was partially analyzed from fuel economy test and city driving test modes. When the cabin cooled down, the supply of electric power to the electric-driven compressor seemed to be controled at the interior temperature level of 8℃ during CS(Charge sustaining) mode, which engine operated after the deletion of charging. When the cabin warmed warm under subzero ambient condition, high voltage PTC heater was mainly used at CD(Charge depleting) mode and engine operated intermittently to heat up coolant. Consequently, battery charging depletion got rapid that fuel economy got worse. Even though heating mode was not operated under freezing weather condition, engine operation seemed to be controlled by coolant inlet temperature to PTC heater at the level of 40℃. Further researches for cool-down performance on the road will be studied.