Chapter I Introduction to Hydraulic and Pneumatic Transmission 1.Power transfer Let us take the hydraulic pressure in the actuator as p2: F2 Let's note the piston area of actuatoras 4,the plai total thrust on it as F, the thrust on the small piston of pump is F: Oil displacement pressure from a pump is called the hydraulic F=pA=B4=4=(4)E system pressure and P=P2=P A is the piston area of pump Thus,We can get the first important character that the working pressure in a hydraulic system depends on the outside Homepage List Upwards Downwards Retun ExitChapter 1 Introduction to Hydraulic and Pneumatic Transmission 4 （1-1） （1-2） 1. Power transfer Thus, We can get the first important character that the working pressure in a hydraulic system depends on the outside load. 2 2 2 F p A = 2 2 1 1 1 1 1 2 1 ( ) F A A F = p A = p A = p A =  Oil displacement pressure from a pump is called the hydraulic system pressure and . is the piston area of pump. Let us take the hydraulic pressure in the actuator as p2 : the thrust on the small piston of pump is F1 : Let’s note the piston area of actuator as , the total thrust on it as . F2 A2 1 2 p p p = = A1