Hybrid Power Controller for Engine Speed Stability
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Solution Overview
Problem
Conventional machines with both electric and hydraulic devices face challenges in controlling power efficiently, leading to undesirable engine operation and inefficiencies, as they struggle to manage the supply of electric and hydraulic power effectively.
Innovation Solution
A system and method that includes a controller to receive request signals for operation, determine the required power level, assess the engine's ability to supply it, and provide control signals to either supply or receive power, ensuring the engine operates within a target speed range, thereby optimizing the operation of both electric and hydraulic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electric and hydraulic devices are used to perform working functions, then energy efficiency is improved, but controlling power supply becomes difficult
Solution Approach 1:
The controller dynamically adjusts operational parameters of the electric and hydraulic devices based on real-time power availability from the internal combustion engine. This includes modulating motor speed, hydraulic pump flow rate, and device operation intensity to match engine output capabilities, thereby maintaining energy efficiency while simplifying control through parameter coordination rather than complex multi-device management
Solution Approach 2:
The system implements feedback control where the controller continuously monitors engine power output and adjusts the operation of electric and hydraulic devices accordingly. Power consumption of each device is detected, and the controller modulates device operation to ensure total power demand matches engine supply capability, resolving the control complexity issue through closed-loop feedback
2Adaptability or versatility
If electric and hydraulic devices operate independently, then device functionality is improved, but engine operation becomes inefficient
Solution Approach 1:
The controller merges the power management of electric and hydraulic devices into a unified control system that coordinates their operation with engine output. By combining the control of multiple devices under a single power management framework, the system maintains the functional versatility of each device while ensuring their combined power consumption aligns with engine efficiency requirements
Solution Approach 2:
The system dynamically allocates power between electric and hydraulic devices based on real-time engine output and operational demands. The controller continuously adjusts the operational state of each device, transitioning between different power consumption levels and operational modes to maintain engine efficiency while preserving the adaptive functionality of individual devices
Data Source
AI summary
A system for controlling power in a machine includes a controller. The controller is configured to receive request signals indicative of requested operation of at least one of an electric device and a hydraulic device. The controller is further configured to determine a requested level of power required to meet the requested operation and determine an ability of the engine to supply the requested level of power. The controller is further configured to provide control signals to the at least one device to either supply power to the engine or receive power from the engine based on the ability of the engine to supply the requested level of power. The controller is also configured to provide control signals to the engine to control speed and output of the engine, wherein the control signals provided to the engine and the at least one device result in operation of the engine within a speed range of a target engine speed.