Hydraulic suspension system for work vehicle

摘要

The hydraulic suspension system comprises a suspension mechanism (100) for a traveling vehicle body, a suspension reference position variation mechanism (18) for varying a reference position of a suspension stroke of the suspension mechanism, and a stopped state detector (58) for detecting a state in which operation of the suspension mechanism (100) has stopped. The control management unit (60) controls the suspension reference position variation mechanism (18) so that when operation of the suspension mechanism (100) is detected by the stopped state detector (58) to be in a stopped state, the operation of the suspension mechanism (100) moves toward a target range, in preference to control based on a suspension stroke position obtained from a suspension stroke position sensor (37).

主权项

1. A hydraulic suspension system comprising:
a suspension mechanism for a traveling vehicle body; a suspension reference position variation mechanism for varying a reference position of a suspension stroke of the suspension mechanism; an intermediate value calculator for detecting a maximum position and a minimum position of the suspension stroke and calculating an intermediate value between the maximum and minimum positions; a cumulating unit for cumulating a frequency at which an intermediate position deviates from a target range as a cumulative frequency; a control unit for controlling an operation variation mechanism so that the intermediate position moves in a preset target direction when the cumulative frequency obtained from the cumulating unit exceeds a preset cumulative frequency; a stopped state detector for detecting a state in which operation of the suspension mechanism has stopped; and a control management unit for controlling the suspension reference position variation mechanism so that when an operation of the suspension mechanism is detected to be in a stopped state, the operation of the suspension mechanism moves toward the target range, in preference to control based on the cumulative frequency of the cumulating unit.