In order to improve the accuracy of electronic fuel injection (EFI) engine fuel pump pressure, according to the characteristics of pump directly driven by motor, a nonlinear mathematical model is built for the fuel supply system of EFI engine pressure control. And then, the nonlinear-function-optimized flow signal is introduced to adjust the parameters of nonlinear function. With the PI control...

We report our techniques on conducting a closed-circuit femoral-femoral bypass during descending aortic surgery by which collected blood can be easily returned into the right atrium. The main circuit was composed of a centrifugal pump, an artificial membrane lung, and a filter. A reservoir with a roller pump was connected to the main circuit via a filter. Extracorporeal circulation was establis...

A solenoid pump is a reciprocating piston pump that moves linearly by the aid of a piston cylinder attached at the linear motor axis which carries out a reciprocating motion. Generally, a solenoid pump is a pump utilizing a magnetic plunger of magnetic substance and an electric induction coil. A solenoid pump model for the hydraulic pressure that can control bi-directionally and can generate a ...

AbstractThe comfortability of the receiptor with a left ventricular assist pump becomes more and more important along with the daily prolonged survival. Thereby it is necessary to achieve automatic measurement and bionic control for heart pump. The key-point is to improve the sensitivity of flow rate change after the pressure head variation in the pump, so as to maintain the flow rate balance b...

Intra-arterial pressure in the brachial artery was compared with that in the femoral artery in children. There were no significant differences in systolic, diastolic, or mean pressures. The average auscultatory systolic pressure in the arm, obtained with a cuff 20% wider than the limb, was identical to the average direct systolic pressure in the brachial and femoral arteries. The auscultatory s...