Oil-Bath Clutch Torque Control via Electronic Feedback
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Solution Overview
Problem
Low-power work vehicles, such as mechanical shovels and tractors, face damage to drive components when accelerating with heavy loads due to excessive torque transfer, leading to potential mechanical failure.
Innovation Solution
A system and method employing an electronically controlled clutch assembly, potentially with an oil-bath clutch, in conjunction with a variable-speed drive mechanism, to regulate torque transfer by adjusting the engagement percentage and velocity ratio of pulleys, utilizing an electronic central control unit to manage torque pressure and prevent component damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the driver applies persistent acceleration to move a heavy load, then the productivity and load-carrying capacity are improved, but the torque transfer exceeds the damage threshold of drive components
Solution Approach 1:
The control system continuously monitors torque load through sensors and compares it against predefined thresholds. When the torque exceeds the damage threshold, the system automatically reduces clutch engagement percentage to limit torque transfer, creating a closed-loop feedback mechanism that prevents component damage while allowing full power transmission during normal operation
Solution Approach 2:
The clutch engagement percentage is dynamically adjusted based on real-time torque conditions rather than remaining fixed. The control unit modifies the engagement level proportionally to the excess torque, enabling the system to adapt between full power transmission during normal operation and protected operation during overload conditions
2Reliability
If an oil-bath clutch is used to control torque transfer, then the torque protection is improved, but the system complexity increases due to electronic control requirements
Solution Approach 1:
The system replaces complex mechanical torque limiting mechanisms with an electronic control system that uses sensors, a control unit, and electronic actuation of the clutch. This substitution allows for more precise and programmable torque control while reducing mechanical complexity in the torque regulation mechanism itself
Solution Approach 2:
The control system automatically monitors torque conditions and adjusts clutch engagement without requiring external intervention or complex operator input. The system self-regulates torque transfer by comparing sensor data against thresholds and autonomously modifying clutch actuation, making the complexity management automatic rather than manual
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
Effectively controls torque transfer, safeguarding mechanical drive components by preventing excessive torque from damaging the system, ensuring reliable operation and extending the lifespan of drive components.
Implementation Method 1
a clutch assembly whose release/engagement percentage can be determined and controlled electronically, and which advantageously, though not necessarily, comprises an oil-bath clutch
Data Source
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AI summary
A system (100) and method for controlling the torque transferable by a mechanical drive (10) between an engine (11) and a shaft (12) of a vehicle. The system (100) is characterized by having: - at least a first actuator (19, 20) which acts on a variable-speed drive (14); - at least a second actuator (31) which acts on a clutch (13) to determine the degree of engagement/release of the clutch (13); and - a measuring device (17) for measuring the torque to or from the variable-speed drive (14). The first and second actuators (19, 20, 31) and the measuring device (17) are controlled by an electronic central control unit ((CC)) to protect the variable-speed drive (14) and/or the clutch (13) from mechanical overloading of the mechanical drive (10).