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US 12,263,719 B2Granted
Control system and control method for vehicle
AssigneesHyundai Motor Company, Kia Corporation
InventorsTae Woong Lim, Hyun Kyun Jung, Ji Wan Son, Han Sol Mun
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Abstract
A control method for a vehicle includes determining whether an internal combustion engine is overheated based on driving information of the vehicle and cooling information of a passenger compartment while the vehicle is driving and an HVAC system is operating in a cooling mode, and controlling an alternator or an actuator of a switching door to reduce a cooling capacity provided by the HVAC system when it is determined that the internal combustion engine is overheated.
Claims7
A control method for a vehicle, the control method comprising:
- controlling, by the processor, an alternator or an actuator of a switching door to reduce a cooling capacity provided by the HVAC system by determining whether a temperature of an engine coolant discharged from the internal combustion engine is higher than a first threshold temperature;
- determining whether an accumulated cooling capacity provided by the HVAC system exceeds a reference accumulated cooling capacity by determining whether the temperature of an engine coolant discharged from the internal combustion engine is higher than a second threshold temperature after the cooling capacity is reduced;
- determining a lower limit temperature of an evaporator of the HVAC system according to a temperature of an engine coolant when the accumulated cooling capacity exceeds the reference accumulated cooling capacity;
- and
- repeatedly turning a clutch of a compressor of the HVAC system on or off by comparing a temperature of the evaporator and a lower limit temperature of the evaporator;
- wherein the second threshold temperature is higher than the first threshold temperature;
- and
- wherein the accumulated cooling capacity is the sum of cooling capacities accumulated after the operation of the HVAC system.
5 more elements
A control system for a vehicle, the control system comprising:
- a processor configured to control an engine cooling system and a heating, ventilation, and air conditioning (HVAC) system;
- a determination module configured to determine whether a reduction in cooling capacity is required;
- and
- a control module configured to control a clutch of a compressor of the HVAC system, an actuator of a switching door of the HVAC system, and an alternator through the determination module,
- wherein the determination module includes:
- an engine overheating determination module configured to determine whether an internal combustion engine is overheated by determining whether a temperature of an engine coolant discharged from the internal combustion engine is higher than a first threshold temperature;
- and
- a cooling determination module configured to determine whether a cooling condition of a passenger compartment meets a reference cooling condition;
- wherein the cooling determination module determines whether the cooling condition of the passenger compartment meets the reference cooling condition based on cooling information of the passenger compartment,
- wherein the control module includes a clutch control module controlling the clutch of the compressor connected to HVAC system,
- wherein the cooling determination module determines whether an accumulated cooling capacity provided by the HVAC system exceeds a reference accumulated cooling capacity by determining whether the temperature of an engine coolant discharged from the internal combustion engine is higher than a second threshold temperature after the cooling capacity is reduced,
- wherein the processor determines a lower limit temperature of an evaporator of the HVAC system according to a temperature of an engine coolant when the accumulated cooling capacity exceeds the reference accumulated cooling capacity,
- wherein the clutch control module controls to repeatedly turn a clutch of a compressor of the HVAC system on or off by comparing a temperature of the evaporator and the lower limit temperature of the evaporator,
- wherein the second threshold temperature is higher than the first threshold temperature, and
- wherein the accumulated cooling capacity is the sum of cooling capacities accumulated after the operation of the HVAC system.
12 more elements
Dependencies are inferred from the claim text.