US 12,083,863 B2
Method for controlling heating of vehicle thermal management system
Tae Han Kim, Seoul (KR); and Jae Hyun Song, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Nov. 1, 2021, as Appl. No. 17/515,743.
Claims priority of application No. 10-2021-0046142 (KR), filed on Apr. 8, 2021.
Prior Publication US 2022/0324295 A1, Oct. 13, 2022
Int. Cl. B60H 1/32 (2006.01); B60H 1/00 (2006.01)
CPC B60H 1/3205 (2013.01) [B60H 1/00485 (2013.01); B60H 2001/3255 (2013.01); B60H 2001/3272 (2013.01); B60H 2001/3285 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for controlling heating of a vehicle thermal management system including a heating, ventilation, and air conditioning (HVAC) subsystem, the method comprising:
based on determining that the HVAC subsystem operates in a heating mode, determining, by a controller, a target temperature for heating a passenger compartment of a vehicle;
determining, by the controller, whether an internal temperature of the passenger compartment is lower than the target temperature;
based on determining that the internal temperature is lower than the target temperature, adjusting, by the controller, an opening amount of a heating-side expansion valve of the HVAC subsystem to a first opening amount;
based on determining that the internal temperature is higher than or equal to the target temperature, decreasing, by the controller, revolutions per minute (RPM) of a compressor of the HVAC subsystem; and
based on determining that the RPM of the compressor reaches a minimum RPM, increasing, by the controller, the opening amount of the heating-side expansion valve; and
increasing, by the controller, the opening amount of the heating-side expansion valve to a second opening amount greater than the first opening amount,
wherein the first opening amount is an opening amount of the heating-side expansion valve with which a heat capacity generated by a heating operation of the HVAC subsystem reaches a maximum heat capacity, and
wherein the second opening amount is an opening amount of the heating-side expansion valve with which a heat capacity for each RPM of the compressor generated by the heating operation of the HVAC subsystem reaches a minimum heat capacity.