Variable Roll Resistance Suspension for Work Vehicles
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Solution Overview
Problem
Existing suspension systems for work vehicles lack the ability to dynamically adjust roll resistance in response to varying terrain conditions, which can lead to instability and discomfort for the operator.
Innovation Solution
A suspension system with a network of cylinders, accumulators, and valves that allow for adjustable fluid flow to modify roll resistance by selectively enabling or restricting fluid flow between cylinders and accumulators, enabling the system to increase or decrease resistance based on detected roll conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If roll resistance is increased to improve stability, then operator comfort and stability are improved, but the suspension system becomes less adaptable to varying terrain conditions
Solution Approach 1:
The suspension system dynamically adjusts roll resistance by controlling fluid flow between cylinders and accumulators in response to detected roll conditions. The system transitions from a static suspension system to a dynamic one that can adapt its characteristics in real-time, resolving the contradiction between stability and adaptability by making the roll resistance variable rather than fixed.
Solution Approach 2:
The system changes the physical parameter of roll resistance by controlling fluid pressure and flow between cylinders and accumulators. By adjusting the amount of fluid in each cylinder based on detected roll conditions, the system can increase or decrease roll resistance as needed, allowing it to maintain stability while adapting to different terrain conditions.
2Adaptability or versatility
If roll resistance is decreased to improve adaptability to terrain, then adaptability is improved, but stability and operator comfort deteriorate
Solution Approach 1:
The system uses dynamic control to adjust roll resistance based on real-time terrain conditions. When adaptability is needed, the system decreases roll resistance by allowing fluid to flow between cylinders and accumulators, while maintaining the ability to restore stability when needed.
Solution Approach 2:
The system incorporates feedback from roll condition detection to continuously adjust fluid distribution between cylinders and accumulators. This feedback mechanism allows the system to respond to terrain changes while maintaining operator station stability within specified limits, resolving the contradiction between adaptability and stability.
3Device complexity
If fixed roll resistance is used to simplify the suspension system, then device complexity is reduced, but the system cannot respond to varying terrain conditions
Solution Approach 1:
The suspension system serves itself by automatically detecting roll conditions and adjusting fluid distribution between cylinders and accumulators without external intervention. This self-regulating capability provides adaptability to terrain conditions while keeping the control system relatively simple, as the system uses its own operational data to make adjustments.
Solution Approach 2:
The fluid coupling system between cylinders and accumulators serves multiple functions: it provides roll resistance during normal operation, allows adaptability to terrain changes, and maintains operator station stability. This multi-functionality reduces the need for separate systems for each function, thereby managing complexity while providing comprehensive performance.
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 provides a variable roll resistance that can be adjusted to maintain the operator station within specified limits, enhancing stability and comfort by responding to changes in terrain, thereby improving the overall operational performance of the work vehicle.
Implementation Method 1
a first valve selectively enabling and restricting fluid flow between the piston side of the first cylinder and the piston side of the second cylinder to adjust a roll resistance of the suspension system
Implementation Method 2
a first accumulator fluidly connected to the piston side of the first cylinder, and a second valve selectively enabling and restricting fluid flow between the first accumulator and the piston side of the first cylinder
Data Source
AI summary
A suspension system for a work vehicle includes a first cylinder having a piston side, a second cylinder having a piston side, and a first valve connected to the first and second cylinders, which extend and retract during a roll condition of the suspension system. The first valve selectively enables and restricts fluid flow between the piston side of the first cylinder and the piston side of the second cylinder to adjust a roll resistance of the suspension system.