Reliability Importance Measures considering Performance and Costs of Mechanical Hydraulic System for Hydraulic Excavators

Figure 4

The schematic principle of ERRS. 1: pump; 2: engine; 3: relief valve; 4: throttle valve; 5: oil tank; 6, 7, 11, 12: reversing valves; : hydraulic accumulator; 9; balance cylinders; 10: boom cylinder.