Suspension system and control method for track-propelled machines

摘要

A suspension system for cold planer with four tracks is disclosed. The suspension system includes a hydraulic cylinder for each track, an additional bypass valve for each hydraulic cylinder and an additional bypass valve that bypasses the operation of the front control valves that control the elevation of the front tracks during a cutting operation. During transport or roading of the cold planer, the bypass valves are energized by a controller and the energized bypass valves provide communication between the head ends of the left side cylinders and the head ends of the right side cylinders. During roading, the energized bypass valves also provide communication between the rod ends of the front cylinders and between the rod ends of the rear cylinders.

主权项

1. A suspension system for a tracked vehicle, the system comprising:
a left front cylinder, a left rear cylinder, a right front cylinder and a right rear cylinder, each of said cylinders including a head end and a rod end, a left front bypass valve, a left rear bypass valve, a right front bypass valve, a right rear bypass valve and a front central bypass valve, the left front bypass valve in communication with the head end of the left front cylinder and the left rear bypass valve, the left rear bypass valve also in communication with the head end of the left rear cylinder, the right front bypass valve in communication with the head end of the right front cylinder and the right rear bypass valve, the right rear bypass valve also in communication with the head end of the right rear cylinder, the front central bypass valve in communication with the rod end of the left front cylinder and the rod end of the right front cylinder, the rod end of the left rear cylinder in communication with the rod end of the right rear cylinder, a left front control valve in communication with the head end and the rod end of the left front cylinder, a right front control valve in communication with the head end and the rod end of the right front cylinder, and a rear control valve in communication with the head end and the rod end of the left rear cylinder and the head end and rod end of the right rear cylinder.