HYDRO-MECHANICAL HYDRAULIC HYBRID DRIVE TRAIN WITH INDEPENDENT WHEEL TORQUE CONTROL

摘要

A hydro-mechanical hybrid drive train (100; 200; 300) is provided. The drive train includes a prime mover (102) that has an output (104). A first hydraulic pump/motor unit (110) is operably coupled to the output (104) of the prime mover (102). The first hydraulic pump/motor unit (110) has a mechanical output (112). A mechanical transmission (114) has a plurality of gear ratios, an input shaft and a mechanical output (116). The input shaft is coupled to the mechanical output (112) of the first hydraulic pump/motor unit (110). A planetary differential (118) is mechanically coupled to the output (116) of the transmission (114) and provides first and second mechanical outputs. A second hydraulic pump/motor unit (130) is coupled to the first mechanical output of the planetary differential (118). At least one drive element (126) is operably coupled to the second mechanical output of the planetary differential (118). A hydraulic accumulator (134) is operably coupled to the first and second hydraulic pump/motor units (110, 130).