THE EFFECTIVE FLUID BULK-MODULUS WITHIN A HYDROSTATIC TRANSMISSION

In this study, the fluid bulk-modulus within a hydrostatic transmissio n is examined. Specifically, a method for measuring the effective flui d bulk-modulus is proposed based upon the definition of the fluid bulk -modulus and the conservation of mass within the system. Using the mea sured parameters of flow, and pressure, a numerical solution for the e ffective fluid bulk-modulus is carried out and a closed-form approxima tion to this solution is presented. Furthermore, the accuracy expectat ions of this method are discussed and compared with traditional method s of estimating the fluid bulk-modulus and it is shown that significan t improvements can be made when the method of this research is employe d.