Agricultural Vehicle Speed Control for Load-Based Work Travel
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Solution Overview
Problem
Agricultural vehicles face challenges in transmitting sufficient driving force to work devices due to varying loads, leading to inadequate performance during reaping and other agricultural tasks, as the load on the engine increases, potentially causing the engine to stop and disrupting work.
Innovation Solution
A vehicle speed control system that adjusts vehicle speed based on the load of the motive power source, storing optimal speeds for subsequent work travel and using a control unit to limit the load, ensuring a sufficient driving force is transmitted to the work device by controlling vehicle speed according to load conditions, including initial work travel control and gear shift operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vehicle speed is increased to improve productivity, then work efficiency increases, but the load on the engine increases causing insufficient driving force transmission to the work device
Solution Approach 1:
The vehicle speed control system dynamically adjusts the vehicle speed based on real-time engine load conditions. The control unit continuously monitors engine load and automatically modifies vehicle speed to maintain optimal operating conditions, ensuring sufficient driving force transmission to the work device while maximizing productivity.
Solution Approach 2:
The system changes the vehicle speed parameter in response to engine load variations. By detecting engine load and adjusting vehicle speed accordingly, the system optimizes the balance between productivity and reliable driving force transmission, preventing engine overload while maintaining efficient work performance.
2Reliability
If vehicle speed is controlled based on real-time load detection, then sufficient driving force is transmitted to the work device, but control accuracy is unstable in the initial stage of work travel
Solution Approach 1:
The control unit stores optimal vehicle speed values that were determined during previous stable work travel periods. At the beginning of new work travel, instead of relying on unstable real-time control, the system retrieves and applies these pre-stored optimal speed values, ensuring accurate and reliable vehicle speed control from the outset.
Solution Approach 2:
The system implements a feedback mechanism where vehicle speed control information from completed work travel is fed back into the control unit and stored. This feedback loop allows the system to learn from past performance and use accumulated knowledge to improve initial control accuracy in subsequent work travel cycles.
Data Source
AI summary
A vehicle speed control system that controls a vehicle speed of an agricultural vehicle that performs work using a work device while traveling using a traveling device, the agricultural vehicle performs work travel a plurality of times with non-work travel interposed therebetween, the vehicle speed control system including: a control unit configured to perform work travel control in which a vehicle speed is set according to a load on a motive power source that drives the traveling device and the work device; and a storage unit in which a vehicle speed that is set during the work travel is stored as an optimum vehicle speed, the control unit performs initial work travel control in which a vehicle speed at a time when the work travel is started after the non-work travel is set using the optimum vehicle speed that is stored during the work travel performed before the non-work travel.