Patent ID: 11885277
Assignee: NIKKI CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 14:
15. The method for controlling fuel injection according to claim 4, wherein:
the calculated amount of air in the intake manifold is calculated from the pressure value detected by the pressure sensor installed in the intake manifold using the formula:, Q
    a
   
   =
   
    
     K
     c
    
    ⁢
    
     
      ω
      π
     
     ·
     
      
       V
       c
      
      
       R
       ·
       
        T
        m
       
      
     
     ·
     
      P
      m
     
    
   
  
  ;
 

Qa is the calculated amount of air in the intake manifold, Kc is the filling efficiency correction coefficient, ω is the revolutions per minute (rpm) of the engine, Vc is the volume in the cylinder, R is a gas constant, Tm is a temperature in the intake manifold, and Pm is the pressure in the intake manifold;
the calculated pressure change in the intake manifold connecting the throttle and the cylinder to each other is calculated from the calculated amount of air in the intake manifold using the formula, d
     dt
    
    ⁢
    
     P
     m
    
   
   =
   
    
     
      R
      ·
      
       T
       m
      
     
     
      V
      m
     
    
    ·
    
     (
     
      
       Q
       t
      
      -
      
       Q
       a
      
     
     )
    
   
  
  ;, and
Vm is the volume in the intake manifold, R is the gas constant, Tm is the temperature in the intake manifold, Pm is the pressure in the intake manifold, Qa is the calculated amount of air in the intake manifold, and Qt is the amount of air passing through the throttle.