Patent ID: 11885273
Assignee: VITESCO TECHNOLOGIES GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 4:
5. The method of claim 4, wherein the gas flow model is determined based on the following:, m
    .
   
   TVV
  
  =
  
   A
   ·
   
    Ψ
    ⁡
    (
    
     
      
       P
       
        down
        ,
         
        TVV
       
      
      
       P
       
        up
        ,
         
        TVV
       
      
     
     ,
     κ
    
    )
   
   ·
   
    
     P
     
      up
      ,
       
      TVV
     
    
    
     
      
       R
       s
      
      ·
      
       T
       
        up
        ,
         
        TVV
       
      
     
    
   
  
 

where
{dot over (m)}TVV is the gas flow model through the timer valve,
Ar is a reduced cross-sectional area of the timer valve through which the flow passes,
Ψ is a flow parameter,
Pdown,TVV is the detected pressure downstream of the timer valve,
Pup,TVV is the detected pressure upstream of the timer valve,
k is an isentropic exponent of a mass flow through the timer valve, and
Rs is a specific gas constant of the mass flow through the timer valve.