Power Train Controller Dynamics for Heavy Machinery Speed
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Solution Overview
Problem
Existing CVT control systems in heavy machinery experience reduced power output and sluggish performance at higher vehicular speeds due to engine speed variations, which can't maintain maximum speed when encountering external resistance like hills, and are affected by increased rolling resistance and internal friction.
Innovation Solution
A power train system with a controller that regulates power output to maintain maximum power production at maximum speed by using a control map to adjust power source speed and transmission ratio based on ground speed, incorporating sensors for real-time data and operator input to optimize power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If existing CVT control strategies maintain engine at maximum power speed while increasing transmission ratio during acceleration, then engine efficiency is improved, but power output is reduced at higher vehicular speeds
Solution Approach 1:
The control system dynamically adjusts engine speed based on vehicular speed and acceleration state. During acceleration, engine speed is increased proportionally with vehicular speed rather than being held constant, allowing the engine to operate in a dynamic range that maintains both efficiency and power output across varying operating conditions
Solution Approach 2:
The system changes the operating parameters (engine speed and transmission ratio) based on the vehicle's operational state. By referencing an acceleration map that defines the relationship between vehicular speed and engine speed, the system optimizes the combination of these parameters to achieve desired acceleration while maintaining adequate power output
2Power
If engine speed is varied during acceleration to maintain maximum power, then power output is maintained, but control complexity increases
Solution Approach 1:
The control system continuously monitors vehicular speed and compares it against the acceleration map to determine the appropriate engine speed. This feedback mechanism allows the system to automatically adjust engine speed in response to changing vehicle conditions, maintaining optimal power output without requiring complex manual intervention or overly complicated control logic
Solution Approach 2:
The acceleration map is pre-calculated and stored, containing the optimal relationship between vehicular speed and engine speed for acceleration events. This preliminary preparation allows the control system to quickly reference and apply the appropriate engine speed without performing complex real-time calculations, thereby reducing control complexity while maintaining power output
Data Source
AI summary
A power train is provided having a power source operably coupled to a transmission to transmit a power output to at least one traction device. The power train also has a controller configured to regulate the power output so that the power output generated when the at least one traction device is moving at a maximum speed is the maximum power output that the power source and the transmission are capable of producing.