Implement Power Limiting for Vehicle Engine Overload Control
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Solution Overview
Problem
Existing vehicle systems face challenges in managing power delivery to implement actuators without overloading the engine, especially when both implement operations and vehicle propulsion are requested simultaneously.
Innovation Solution
A vehicle system that includes a human/machine interface, a plurality of implement actuators, and a controller that adjusts the power delivered to implement actuators based on the power requested through the human/machine interface, thereby limiting power to prevent engine overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power is delivered to multiple implements simultaneously, then implement operation capability is improved, but engine overload risk increases
Solution Approach 1:
The system dynamically adjusts the power delivered to implement actuators based on real-time power requests and engine capacity. The controller continuously monitors power demands from multiple implements and modifies power delivery accordingly, transitioning from static power allocation to dynamic power management that adapts to changing operational conditions.
Solution Approach 2:
The controller changes the power parameter delivered to implement actuators by adjusting the hydraulic pump's power output based on aggregate power requests. When the sum of power requests exceeds engine capacity, the system modifies power delivery parameters to prevent overload while still allowing implement operation within available power constraints.
2Adaptability or versatility
If power is delivered to implements, then implement functionality is improved, but vehicle propulsion power may be insufficient
Solution Approach 1:
The system dynamically balances power distribution between implements and propulsion based on real-time power requests. The controller monitors both implement power demands and propulsion power needs, continuously adjusting power allocation to maintain adequate propulsion power while enabling implement functionality according to available engine capacity.
Solution Approach 2:
The system uses feedback from power request signals to adjust power delivery. The controller receives power requests from the human-machine interface for both implements and propulsion, aggregates these demands, and uses this feedback information to modulate power delivery to implement actuators, ensuring propulsion power requirements are met while providing implement functionality.
Data Source
AI summary
Methods and systems for operating implements of a vehicle are described. Operation of the implements may be adjusted in response to input to a human/machine interface, such as a joystick. In one example, one or more implement requests are scaled according to a human/machine allowance factor, where the human/machine allowance factor is based on an implements power limit and an implements requested power.