Working Vehicle Traction Control via Torque Calculation
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Solution Overview
Problem
Existing working vehicle-implement combinations face challenges in precise and efficient traction control due to limited mechanisms for setting the vehicle-implement combination, inaccurate force measurement using load pins, and complex, costly systems that are not reliable or precise.
Innovation Solution
A method for operating a working vehicle-implement combination that determines engine torque, loss torques, and output torque to adjust the tractive force through control operations, eliminating the need for complex sensors and measurement bolts by using a control unit to set engine and load parameters, thereby enabling precise and efficient traction control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force-measuring bolts with strain gauges are used to measure traction force, then traction force can be measured, but the measurement accuracy depends on implement type, the bolts become dirty quickly leading to inaccurate measurements, and too much installation space is required
Solution Approach 1:
The patent extracts the force measurement function from physical load pins and strain gauges, transferring it to a control unit that calculates traction force based on engine torque, fan torque, generator torque, and pump torque measurements. This eliminates the need for mechanical force sensors while maintaining measurement capability.
Solution Approach 2:
The patent replaces the mechanical force measurement system (load pins, strain gauges) with an electronic calculation system. The control unit computes traction force by subtracting parasitic torques (fan, generator, pump) from engine torque, substituting mechanical sensing with electronic computation.
2Reliability
If known traction control systems adjust implement position or vehicle acceleration based on tractive force deviation, then traction control is achieved, but the systems are too complex and expensive to manufacture and maintain
Solution Approach 1:
The control unit performs multiple functions: it manages engine operation, calculates parasitic torques from fan, generator, and pump, determines traction force, and executes control operations. This multi-functionality consolidates what would otherwise require separate systems into a single integrated unit.
Solution Approach 2:
The system uses existing sensors already present in the vehicle (engine torque sensor, fan torque sensor, generator torque sensor, pump torque sensor) to perform traction control calculations, rather than requiring additional dedicated sensors. The system serves itself by utilizing available data infrastructure.
3Ease of operation
If multiple mechanisms and parameters are available for adjusting output torque, then precise and efficient traction force control is enabled, but the system becomes more complex
Solution Approach 1:
The system dynamically adjusts traction force control by varying engine torque and parasitic torque contributions in real-time. The control unit continuously monitors and adjusts the balance between useful work output and parasitic losses, enabling adaptive optimization without fixed mechanical adjustments.
Data Source
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AI summary
The invention relates to a method for operating a work vehicle-work equipment combination (10) with a subsystem (16) for adjusting the work vehicle-work equipment combination (10).The procedure comprises the following steps: Determining an engine torque (28) of an engine (20) of the work vehicle-work tool combination (10) as a function of an engine parameter, determining a first loss torque (30) as a function of at least one engine loss parameter of the engine (20), determining a second loss torque (32) as a function of at least one load parameter of the at least one load system (24) of the work vehicle-work tool combination (10), determining an output torque (36) of the work vehicle-work tool combination (10) based on the engine torque (28) and the first and second loss torques (30, 32), and performing a control operation on the work vehicle-work tool combination (10) and/or the subsystem (16) as a function of the output torque (36).The invention further relates to a system for a work vehicle-work equipment combination (10) and a work vehicle-work equipment combination.