Patent ID: 11960801
Assignee: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Field: Transport (Mechanical engineering)
Classification: CPC B  G  F  Y | IPC G

Claim 0:
1. A method for calculating a pressure loss of a parallel R-type automobile vibration damper, the automobile vibration damper comprising a frame (11), an axle (17) and a hydraulic cylinder (13), wherein a spring (12) is disposed between the frame (11) and the axle (17);
an upper end of the hydraulic cylinder (13) is connected to the frame (11) through a piston rod of the hydraulic cylinder (13), and a lower end of the hydraulic cylinder (13) is connected to the axle (17); and a piston (15) in the hydraulic cylinder (13) separates the hydraulic cylinder (13) into an upper oil tank (14) and a lower oil tank (16); and
a pipeline between oil delivery ports of the upper oil tank (14) and the lower oil tank (16) is connected with a resistance adjustment section; that is, an oil delivery port D of the resistance adjustment section is connected to an oil delivery port A of the upper oil tank (14), and an oil delivery port C of the resistance adjustment section is connected to an oil delivery port B of the lower oil tank (16);
characterized in that the method to improve a control quality of the automobile vibration damper comprises the following steps:
(1) determining a value range of i;
(2) calculating flow resistances RfRi of all capillaries in operation of the resistance adjustment section:, R
    fRi
   
   =
   
    
     128
     ⁢
     
      μl
      
       R
       ⁢
       i
      
     
    
    
     π
     ⁢
     
      d
      
       R
       ⁢
       i
      
      4
     
    
   
  
  ;
 

(3) calculating a total flow resistance RfRt of the resistance adjustment section operating in parallel:, R
    
     fR
     ⁢
     t
    
   
   =
   
    1
    
     
      
       ∑
        
      
      i
     
     ⁢
     
      1
      
       R
       fRi
      
     
    
   
  
  ;
 

 and
(4) calculating a total pressure loss of the automobile vibration damper:

ΣΔp=RfRt·qt 

(5) adjusting the resistance of the automobile vibration damper by a control system of the automobile;
wherein i is a label number of the capillaries in operation, μ is a dynamic viscosity of liquid, lRi is a length of a capillary Ri in operation of the resistance adjustment section, dRi is a diameter of the capillary Ri in operation of the resistance adjustment section, and qt is a total flow rate of the resistance adjustment section in operation.