A Novel Energy-Efficient Transmission System and Control Strategy for Hydraulic Machines

Table 2

Pressure loss of each circuit in the two HPs.

Circuits	HP with 3-D structure	THP
Motor-pump circuits	1.67 MPa	4.24 MPa
Main-cylinder circuits	1.61 MPa	5.12 MPa
Oil-filling circuits	1.52 MPa	4.09 MPa
Unloading circuits	1.33 MPa	4.71 MPa
Control circuits	1.41 MPa	3.30 MPa
Boosting and recovery circuit	1.23 MPa	0 MPa