Dual-variable control load-sensing system for multi-way valves in hilly and mountainous tractors

Area of Science:

• Agricultural Engineering
• Hydraulic Systems
• Control Systems

Background:

• Tractor multi-way valves face challenges like pressure loss and flow mismatch, especially in hilly terrains.
• Existing systems struggle with efficiency and stable pressure delivery under varying loads.

Purpose of the Study:

• To develop a load-independent flow distribution system for tractor multi-way valves.
• To enhance energy efficiency and operational stability in demanding agricultural environments.

Main Methods:

• Developed a dual-variable load sensing system integrating electro-hydraulic load-sensing pump and independent flow distribution.
• Utilized AMESim software for component modeling and system simulation.
• Implemented a load-sensitive variable pump with pressure differential and displacement detection, plus post-compensation and electro-hydraulic proportional valve.

Main Results:

• Achieved average energy savings of 20%, up to 50% under optimal conditions.
• Maintained pressure fluctuations at the valve port within a 5% margin.
• Demonstrated significant improvements in energy efficiency and operational effectiveness.

Conclusions:

• The dual-variable load sensing system effectively addresses pressure loss and flow mismatch in tractor multi-way valves.
• This technology provides a reliable framework for optimizing hydraulic systems in agricultural machinery for hilly and mountainous regions.