Work Vehicle Torque Control for Synchronized Travel and Arm Lifting
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Solution Overview
Problem
Existing work vehicles require complex and precise operations from operators during the rise/run process, leading to increased burden and potential reductions in carrying work efficiency and fuel efficiency, especially when the bucket height is high or the road surface is acclivitous.
Innovation Solution
A work vehicle equipped with a traveling state detecting device, a working state detecting device, and a control device that adjusts travel and work driving forces based on vehicle speed, traveling distance, and arm angle to synchronize the completion times of forward traveling and arm lifting, reducing operator burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the operator performs precise operations to align travel and lifting completion times, then carrying work efficiency and fuel efficiency are improved, but the operational burden on the operator increases
Solution Approach 1:
The control device automatically adjusts the travel driving force and work driving force based on detected vehicle speed, traveling distance, and arm angle, eliminating the need for manual operator adjustments. The system self-regulates to synchronize travel and lifting completion times, reducing operational burden while maintaining efficiency.
Solution Approach 2:
The control device continuously monitors vehicle speed, traveling distance, and arm angle through detecting devices, and uses this feedback to dynamically adjust driving forces. This closed-loop control ensures synchronization of travel and lifting operations without requiring operator intervention.
2Productivity
If the travel driving force is not controlled when bucket height is high or road surface is acclivitous, then the arm lifting completes before travel, but carrying work efficiency and fuel efficiency are reduced
Solution Approach 1:
The control device dynamically adjusts the travel driving force and work driving force in real-time based on changing operating conditions such as bucket height and road surface gradient. The system adapts its control parameters automatically, handling varying conditions without requiring complex manual intervention.
Solution Approach 2:
The control device changes the driving force parameters based on detected operating conditions. When bucket height or road surface gradient changes, the system modifies the travel and work driving force parameters to maintain proper synchronization, preventing efficiency losses.
3Manufacturing precision
If the operator manually adjusts operation amounts during rise/run, then precise synchronization is achieved, but the operational burden increases
Solution Approach 1:
The control device performs automatic synchronization of travel and lifting operations by self-adjusting driving forces based on real-time detection of vehicle speed, traveling distance, and arm angle. This eliminates the need for manual operator adjustments while achieving precise synchronization.
Solution Approach 2:
The patent replaces manual mechanical adjustment by the operator with an automated control system using sensors and actuators. The detecting devices monitor operational parameters and the control device executes precise adjustments, substituting human operation with an automated control mechanism.
Data Source
AI summary
The work vehicle 1 includes a main controller 100 that controls a travel driving force and a work driving force. The main controller 100 includes a travel remaining time calculating unit 111 that calculates a remaining time until a target rise/run distance is reached as a travel remaining time tC, a work remaining time calculating unit 112 that calculates a remaining time until a target arm angle is reached as a work remaining time t1, a rise/run determining unit 113 that determines whether rise/run is being performed or not, a correction rate setting unit 114 that sets a travel correction rate ηC that adjusts a travel driving torque and a work correction rate ηI that adjusts a work driving torque based on the travel remaining time tC, the work remaining time t1, and the rise/run determination flag, and an engine torque distribution calculating unit 115 that calculates a travel driving torque command and a work driving torque command based on the travel correction rate ηC and the work correction rate ηI.