Work Vehicle Engine Torque Limit Adjustment
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Solution Overview
Problem
Current work vehicles face reduced drivetrain performance due to fixed engine torque limits, which prioritize drivetrain protection over hydraulic power demands, leading to insufficient engine power for both hydraulic and drivetrain components.
Innovation Solution
A system and method that dynamically adjust engine torque limits based on current hydraulic power requirements, using a computing device to monitor hydraulic system parameters and adjust torque limits, ensuring the engine operates within adjusted limits to optimize power distribution between hydraulic and drivetrain systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed engine torque limits are defined for drivetrain protection, then drivetrain component reliability is improved, but engine power available for hydraulic components is reduced
Solution Approach 1:
The patent implements dynamic torque limit adjustment by the controller, which modifies the engine torque limit based on real-time hydraulic power consumption. Instead of using a fixed torque limit for drivetrain protection, the system continuously monitors hydraulic system demands and adjusts the torque limit accordingly, allowing the torque limit to be variable rather than static. This resolves the contradiction by enabling the system to provide higher torque when hydraulic demand is low while still protecting the drivetrain when hydraulic demand is high.
Solution Approach 2:
The patent changes the parameter of engine torque limit from a fixed value to a dynamically adjustable value based on hydraulic power requirements. The controller monitors hydraulic system parameters and adjusts the torque limit parameter in real-time, allowing the system to optimize the balance between drivetrain protection and hydraulic power availability. This parameter change enables the torque limit to adapt to varying operational conditions.
2Reliability
If engine torque is limited to protect drivetrain, then drivetrain reliability is improved, but vehicle overall performance is reduced
Solution Approach 1:
The system dynamically adjusts the torque limit based on real-time hydraulic power consumption, allowing the vehicle to maintain optimal performance across varying operational conditions. When hydraulic demand is low, the torque limit is relaxed to maximize drivetrain power availability and vehicle performance. When hydraulic demand is high, the torque limit is adjusted to prevent drivetrain overload. This dynamic adjustment resolves the contradiction by enabling the system to maintain both drivetrain reliability and vehicle performance simultaneously.
Solution Approach 2:
The patent implements parameter changes by adjusting the torque limit value based on hydraulic system demands. The controller continuously monitors hydraulic power consumption and modifies the torque limit parameter to optimize the balance between drivetrain protection and vehicle performance. This parameter adjustment enables the system to maintain high vehicle productivity while still protecting the drivetrain from excessive loads.
3Reliability
If fixed torque limits are used for each gear ratio, then drivetrain protection is ensured, but engine power availability for varying hydraulic loads is insufficient
Solution Approach 1:
The patent implements dynamic torque limit adjustment that adapts to varying hydraulic loads in real-time. Instead of using fixed torque limits for each gear ratio, the controller continuously monitors hydraulic power consumption and adjusts the torque limit accordingly. This dynamic adjustment enables the system to maintain drivetrain protection while adapting to varying hydraulic demands across different operating conditions and gear ratios.
Solution Approach 2:
The system changes the torque limit parameter from a fixed value per gear ratio to a dynamically adjustable value based on hydraulic power requirements. The controller monitors hydraulic system parameters and adjusts the torque limit parameter in real-time, allowing the system to optimize engine power availability for varying hydraulic loads while maintaining drivetrain protection. This parameter change enables the system to adapt to different operational scenarios.
Data Source
AI summary
In one aspect, a method for adjusting torque limits for a work vehicle may include controlling, with a computing device, an operation of an engine of the work vehicle such that a torque output of the engine is maintained at or below a baseline engine torque limit. The method may also include receiving, with the computing device, an input associated with a current hydraulic power requirement of a hydraulic system of the work vehicle, and adjusting, with the computing device, a torque limit for the engine from the baseline engine torque limit to an adjusted engine torque limit based on the current hydraulic power requirement of the hydraulic system. In addition, the method may include controlling, with the computing device, the operation of the engine such that the torque output of the engine is maintained at or below the adjusted engine torque limit.