| 摘要 |
A pump enable system includes a variable-displacement piston pump (10, 110) having a displacement control device (22, 122). The displacement control device (22, 122) controls displacement of pistons in the pump (10, 110) based on a position thereof, and a position control system (24, 26, 28, 124, 126) in the pump (10, 110) controls a position of the displacement control device (22, 122) based on a load on the pump (10, 110). An over-ride system (52, 152) selectively over-rides the position control system (24, 26, 28, 124, 126) such that the displacement control device (22, 122) assumes a position which reduces displacement of the pistons in the pump (10, 110). <IMAGE>
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