Hybrid Cart Engine Control for Energy Efficiency
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Solution Overview
Problem
Existing cart and work machine systems face challenges in effectively controlling the operation of engines for power generation and travel, particularly in determining when to operate the engine based on various conditions such as battery voltage, sensor data, and environmental factors, which can lead to inefficient energy use and potential engine failures.
Innovation Solution
A cart system equipped with an electric motor, battery, engine, and determination unit that uses control signals from an external control unit to decide whether to operate the engine based on predetermined conditions, such as battery voltage and sensor data, to optimize power generation and travel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine is operated continuously to ensure sufficient power supply, then the battery remains charged, but energy is wasted through unnecessary power generation
Solution Approach 1:
The engine operation mode is dynamically adjusted based on real-time conditions. The control unit switches between idle rotation mode (when battery charge is sufficient) and power generation mode (when battery charge is insufficient), optimizing energy usage while ensuring reliability.
Solution Approach 2:
The system continuously monitors battery charge levels and adjusts engine operation accordingly. When the battery charge exceeds a predetermined threshold, the engine switches to idle rotation or stops power generation, preventing energy waste while maintaining sufficient charge availability.
2Productivity
If the engine operates at high speed to generate power quickly, then charging efficiency is improved, but engine wear and potential failures increase
Solution Approach 1:
The engine speed is dynamically adjusted based on charging needs. When rapid charging is required, the engine operates at high speed; when charging is not urgent, the engine operates at idle or lower speeds, reducing wear while maintaining charging capability.
Solution Approach 2:
The engine alternates between high-speed power generation periods (when battery charge is low) and idle/low-speed periods (when battery charge is sufficient), reducing cumulative wear while ensuring charging productivity when needed.
3Loss of energy
If the engine is stopped to reduce energy consumption, then energy efficiency improves, but the battery may become insufficiently charged
Solution Approach 1:
The control unit continuously monitors battery charge levels and compares them against predetermined thresholds. When charge drops below the threshold, the engine automatically resumes operation to recharge, ensuring reliability is maintained while minimizing energy waste during sufficient charge periods.
Solution Approach 2:
The system automatically manages engine operation based on battery status without external intervention. The engine self-regulates between operation and idle states based on real-time battery charge levels, optimizing the balance between energy efficiency and charge sufficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for more effective engine operation control, reducing unnecessary power generation and preventing engine failures by determining engine operation based on specific conditions, thereby enhancing energy efficiency and system reliability.
Implementation Method 1
a battery configured to supply power to the electric motor
Implementation Method 2
an engine configured to drive a power generator which is configured to be capable of charging the battery
Data Source
AI summary
There is provided a cart. An electric motor generates a travel driving force based on a control signal from an external control unit configured to perform control related a travel path of the cart. A battery supplies power to the electric motor. An engine drives a power generator which is configured to be capable of charging the battery. A determination unit determines whether the engine is to be operated, based on a predetermined condition.