Front Loader ISOBUS Control for Stable Hydraulic Load Handling
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Solution Overview
Problem
Existing work vehicle and attachment systems lack advanced control and coordination mechanisms, relying solely on hydraulic interfaces that do not account for the active state of the attachment, leading to inefficiencies and potential stability issues.
Innovation Solution
Implementing an attachment bus system with pressure and motion sensors, electronically controlled valve assemblies, and control logic to manage hydraulic actuators, allowing bidirectional communication between the work vehicle and attachment for precise control and coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hydraulic interfaces alone are used for control, then the system structure is simple, but the control precision and functionality are limited
Solution Approach 1:
The patent combines hydraulic interfaces with electronic bus systems (ISOBUS) to create an integrated control architecture. The attachment control unit communicates with the work vehicle control unit via electronic data buses, merging hydraulic actuation with electronic control and monitoring capabilities, thereby improving control precision without excessively increasing system complexity
Solution Approach 2:
The patent implements feedback mechanisms through sensors that detect attachment position, hydraulic pressure, and operational status. This data is transmitted via the electronic bus system to control units that automatically adjust hydraulic actuator operations, enabling precise closed-loop control of attachment movements and hydraulic fluid distribution
2Stability of the object's composition
If multiple hydraulic actuators are controlled independently, then the device functionality is sufficient, but the coordination and stability are poor
Solution Approach 1:
The patent creates a universal control architecture where the attachment control unit and work vehicle control unit communicate through standardized electronic bus interfaces. This multi-functional system coordinates multiple hydraulic actuators simultaneously, managing lifting, tilting, and positioning operations with unified control logic, thereby improving coordination without proportionally increasing complexity
Solution Approach 2:
The control system uses feedback from position sensors, pressure sensors, and motion detectors to continuously monitor the state of multiple hydraulic actuators. The control units process this information and automatically adjust actuator operations to maintain system stability during coordinated movements, preventing instability caused by independent actuator control
3Measurement precision
If no electronic sensors are used, then the device complexity is low, but the load detection and adaptive control are insufficient
Solution Approach 1:
The patent implements self-service functionality where sensors automatically detect attachment load, position, and operational parameters without manual intervention. The control units process this sensor data and automatically adjust hydraulic actuator operations based on detected conditions, enabling adaptive control that improves load detection precision while keeping the sensor system integration straightforward
Solution Approach 2:
Pressure sensors in the hydraulic system and position sensors on attachment components provide continuous feedback to the control units. This feedback enables automatic load detection and adaptive adjustment of hydraulic fluid distribution to multiple actuators, improving measurement precision without requiring complex external monitoring systems
Data Source
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AI summary
The invention relates to an attachment (67), in particular a front loader (4), and a vehicle combination (1) comprising a work vehicle (66), in particular a tractor (2), and an attachment (67). According to the invention, the attachment (67) has a hydraulic system (26) with hydraulic actuators (59), in particular a lifting cylinder (36) and a tilting cylinder (37). The attachment (67) also has an attachment bus system (27), which is preferably designed as an ISOBUS. The attachment bus system (27) has an attachment bus interface (32) which can be coupled to a work vehicle bus system (15) via a work vehicle bus interface (33). The attachment bus system (27) is coupled to pressure sensors (38, 39, 41, 42) and/or motion sensors (40, 43) such that measurement signals can be transmitted via the attachment bus system (27).Preferably, bidirectional communication and coordination of the operating states of the work vehicle (66) and the attachment (67) takes place via the work vehicle bus system (15) and the attachment bus system (27).