Patent ID: 11951802
Assignee: HYUNDAI MOTOR COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 3:
4. The method of claim 2, wherein determining the coolant hysteresis temperature value βn comprises:
determining the coolant hysteresis temperature value βn using (PFEOROff−PFEOROn)=−(Gradientn*ΔT)=βn obtained by converting, Gradient
   n
  
  =
  
   
    ΔTemperature
    ΔTime
   
   =
   
    
     (
     
      
       PFEOR
       on
      
      -
      
       PFEOR
       off
      
     
     )
    
    
     Δ
     ⁢
     T, for deriving the coolant hysteresis temperature value βn,
where gradientn is a coolant temperature descent gradient for each heating load, ΔT is a temperature variation, PFEORon is a coolant temperature in a case of PFEOR control ON, and PFEORoff is a coolant temperature in a case of PFEOR control OFF.