The Development of a Digital Computer Program for Analyzing the Performance of Hydrostatic and Hydro-Mechanical Transmissions

The digital computer has greatly enhanced the ability to analyze accurately the performance of hydrostatic and hydromechanical transmissions. The requirements for developing a computer program for analyzing the transmission's performance were to:

1. 1.
   Describe the transmission's performance data in a manner readily usable by the digital computer.
2. 2.
   Obtain accurate data from the hydraulic components.
3. 3.
   Prepare a program which is capable of analyzing the transmission's performance at any combination of operating conditions throughout the operating spectrum of the transmission.
4. 4.
   Present the output data in a form readily usable by design and application engineers.

This paper describes how the above program was developed for analyzing both the transmission's performance and performance of vehicles using the transmission.