| 摘要 |
PROBLEM TO BE SOLVED: To selectively perform splitter shifting of a duplex type transmission manually or automatically, and prevent the manual select of splitter shifting from being obstructed at a failure or the like. SOLUTION: This control valve assembly 94 is arranged between a manual selector valve 104 and a two position pilot valve 112 controlling a two position splitter piston/cylinder actuator assembly 86. Only when splitter shifting is automatically performed, a first valve 134 is operated to obstruct communication of a first conduit 108 and a second conduit 110. A second valve 136 pressurizes the pilot valve 112 on the operation position to connect it with a pressure fluid source S, operates a shift actuator 86 to move a shift fork 84, and performs splitter shifting. When a solenoid S*1 or S*2 are broken down, the orbits of the respective solenoids are released, the first conduit 108 and the second conduit 110 are communicated together, and the shift actuator 86 is operated by the manual selector valve 104. |
