Hydraulic Suspension Reference Position Control for Work Vehicle Durability
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Solution Overview
Problem
The high operative frequency of the suspension reference position variation mechanism in work vehicles leads to reduced durability, particularly when dealing with uneven terrain and attached implements that cause significant load fluctuations, resulting in frequent deviations from a predetermined vehicle height range.
Innovation Solution
A hydraulic suspension system that includes a suspension mechanism, a reference position variation mechanism, a sensor for detecting stroke position, and a control unit that adjusts the reference position based on sensor data to maintain the vehicle within a target range, utilizing a stopped state detector and cumulative frequency calculator to optimize the operation frequency and reduce wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the suspension reference position variation mechanism operates frequently to maintain vehicle height within the target range, then the vehicle height stability is improved, but the durability of the suspension reference position variation mechanism deteriorates
Solution Approach 1:
The control management unit detects stopped states of the suspension mechanism in advance and preferentially controls the reference position variation mechanism during these periods. This preliminary detection and preferential control allows the system to proactively maintain vehicle height stability during critical periods without requiring continuous high-frequency operation, thereby reducing overall operative frequency and improving durability while maintaining stability
2Manufacturing precision
If the suspension reference position variation mechanism operates at high frequency to correct deviations from target range, then the vehicle height control precision is improved, but the operative load on the mechanism increases
Solution Approach 1:
The control management unit implements periodic detection of stopped states and selectively activates the reference position variation mechanism during these periodic intervals. This periodic action pattern maintains control precision during critical stopped periods while avoiding continuous high-frequency operation, thereby reducing cumulative operative load and extending mechanism life
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively maintains vehicle height within a predetermined range, reducing the operational load on the suspension reference position variation mechanism and enhancing its durability by adjusting the control frequency based on load changes and implement operations, ensuring stable terrain clearance.
Implementation Method 1
a hydraulic cylinder (7) connected between said support frame (5) and said support bracket (6) so as to move the support bracket (6) vertically
Implementation Method 2
a sensor for detecting the position of the suspension stroke
Data Source
AI summary
The hydraulic suspension system comprises 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, and a stopped state detector for detecting a state in which operation of the suspension mechanism has stopped. The control management unit controls the suspension reference position variation mechanism so that when operation of the suspension mechanism is detected by the stopped state detector to be in a stopped state, the operation of the suspension mechanism moves toward a target range, in preference to control based on a suspension stroke position obtained from a suspension stroke position sensor.