Boom Cylinder Valve Control for Adjustable Float Modes
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Solution Overview
Problem
Existing work machines lack an adjustable boom float function that can be tailored to various work modes, limiting their versatility and efficiency in different applications.
Innovation Solution
A boom control system with a controller that individually controls the opening degrees of valves connected to the head and bottom side oil chambers of the boom cylinder, allowing for adjustable boom float functionality based on the current work mode, without additional valves or mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed boom float function is implemented, then the boom can swing freely in a single mode, but the system cannot adapt to various work modes
Solution Approach 1:
The patent implements dynamic control of the boom float function by enabling the controller to adjust the opening degrees of first and second openings based on different work modes. The valve system transitions from a fixed state to a dynamically adjustable state, allowing the boom float function to adapt to various work conditions such as ground scraping, rock breaking, and excavation without adding complex mechanical structures
Solution Approach 2:
The patent changes the flow resistance parameters of the first and second openings controlled by the valve system. By adjusting the opening degrees dynamically, the system modifies hydraulic flow parameters to achieve different boom float characteristics suitable for various work modes, resolving the contradiction between adaptability and complexity
2Productivity
If individual control of first and second openings is implemented, then the boom float function can be optimized for different work modes, but the control system complexity increases
Solution Approach 1:
The patent makes the existing controller perform multiple functions by adding capability to individually control first and second openings based on work mode detection. The single controller handles both normal operation and boom float function adjustment, eliminating the need for separate control systems while improving productivity across different work modes
Solution Approach 2:
The controller automatically detects the current work mode and autonomously adjusts the valve opening degrees without requiring manual intervention. The system serves itself by making real-time control decisions based on work conditions, thereby improving operational efficiency while keeping the control interface simple
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
Enables the boom float function to be adjusted according to specific work modes, enhancing the machine's performance in tasks like ground scraping, rock breaking, and excavation by optimizing the hydraulic oil flow, thus improving operational efficiency and durability.
Implementation Method 1
a hydraulic pump, an oil tank, a first valve, and a second valve. The boom cylinder drives the boom and includes a head side oil chamber and a bottom side oil chamber. The first valve supplies oil from the hydraulic pump to the head side oil chamber and discharges the oil to the oil tank. The second valve supplies oil from the hydraulic pump to the bottom side oil chamber and discharges the oil to the oil tank.
Implementation Method 2
The first valve includes a first opening for discharging the oil in the head side oil chamber to the oil tank. The second valve includes a second opening for discharging the oil in the bottom side oil chamber to the oil tank. The controller individually controls an opening degree of the first opening and an opening degree of the second opening
Data Source
AI summary
A boom cylinder drives a boom, and includes a head side oil chamber and a bottom side oil chamber. A first valve includes a first opening for discharging oil in the head side oil chamber to an oil tank, and supplies oil from a hydraulic pump to the head side oil chamber. A second valve includes a second opening for discharging oil in the bottom side oil chamber to the oil tank, and supplies oil from the hydraulic pump to the bottom side oil chamber. A controller individually controls an opening degree of the first opening and an opening degree of the second opening, during work including manipulation of the boom.