Hydraulic Cylinder Warning Timing for Stroke-End Impact Control
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Solution Overview
Problem
Less experienced operators struggle to prevent hydraulic cylinder pistons from reaching the stroke end, leading to noise generation due to the physical impact.
Innovation Solution
A work machine system with a controller that issues warnings before the stroke end and adjusts the timing of the warning based on the operator's skill level and cylinder speed to prevent piston impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a warning is issued when the piston approaches the stroke end, then the operator is notified of the approaching stroke end, but less experienced operators still fail to prevent the piston from reaching the stroke end, causing noise
Solution Approach 1:
The system performs preliminary action by issuing a warning at a predetermined position before the stroke end is reached. This advance warning gives the operator time to respond and prevent the piston from reaching the stroke end, thereby avoiding noise generation from impact
Solution Approach 2:
The system continuously monitors the piston position and provides feedback to the operator through warning issuance when the piston approaches the stroke end. This feedback mechanism enables the operator to adjust operations in real-time to prevent harmful impact noise
2Reliability
If the warning is issued earlier to give more reaction time, then less experienced operators have better chance to respond, but the warning may be issued too early reducing operational efficiency
Solution Approach 1:
The system changes the parameter of warning issuance timing based on cylinder speed. When the cylinder speed is high, the warning is issued at a position farther from the stroke end to provide adequate reaction time. When the speed is low, the warning is issued closer to the stroke end, maximizing operational efficiency while maintaining reliability
3Device complexity
If the warning position is fixed regardless of cylinder speed, then the control system is simple, but it cannot adapt to different operating conditions and fails to prevent impact at high speeds
Solution Approach 1:
The system applies dynamics by making the warning issuance position variable rather than fixed. The warning position is dynamically adjusted based on the detected cylinder speed, allowing the system to adapt to different operating conditions and maintain effective impact prevention across varying speeds
Data Source
AI summary
A work machine capable of suppressing a piston of a hydraulic cylinder reaching a stroke end is provided. The work machine includes a vehicular body, a work implement supported on the vehicular body, a hydraulic cylinder that drives the work implement, an issuance apparatus that issues a warning, and a controller that controls the hydraulic cylinder and the issuance apparatus. The hydraulic cylinder includes a cylinder portion and a piston capable of carrying out reciprocating movement within the cylinder portion. The controller can control the issuance apparatus to issue a warning when the piston reaches a warning issuance position before the stroke end of the hydraulic cylinder, and can adjust timing of issuance of the warning.