HYDROSTATIC DRIVE SYSTEM WITH VARIABLE CHARGE PUMP

摘要

A hydraulic system (20) is provided having a reservoir (25) configured to hold a supply of fluid. The hydraulic system also has a variable displacement pump (36) configured to supply charge fluid and pilot control fluid to the hydraulic system. In addition, the hydraulic system has a closed-loop portion (32) configured to receive charge fluid from the variable displacement pump and drive a mechanism (22). The hydraulic system further has a pilot fluid supply portion (28) configured to direct pilot control fluid from the variable displacement pump to the closed-loop portion.