Method for calculating pressure loss of parallel R-type automobile vibration damper

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.