Generator Set Engine Shutdown for Load-Dependent Efficiency
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Solution Overview
Problem
Traditional portable generator sets operate at constant speed, leading to unnecessary noise, fuel consumption, and pollution, even when power usage is light, as they must maintain operation regardless of load.
Innovation Solution
Incorporating an internal combustion engine, DC generator, battery cells, and an inverter, allowing the engine to shut down once batteries are charged, with the inverter supplying power to the load from the batteries, reducing engine operation time and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine operates at constant speed to provide power, then the generator can supply usable power to the load, but noise, fuel consumption, and pollution increase unnecessarily during light loads
Solution Approach 1:
The system dynamically switches between engine-driven generation and battery-powered inversion based on load conditions. The controller monitors battery charge levels and automatically transitions operation modes: engine runs at constant speed when batteries need charging, otherwise the engine shuts down and the inverter supplies power from batteries, eliminating unnecessary engine operation during light loads and reducing noise, fuel consumption, and pollution.
Solution Approach 2:
The system uses its own generated power to recharge its own battery storage through the DC generator, creating a self-sustaining energy management cycle. The controller manages this self-charging process automatically, allowing the system to maintain power supply reliability while minimizing external fuel consumption and harmful emissions.
2Reliability
If the engine operates continuously to ensure power availability, then power supply reliability is maintained, but fuel consumption and operational costs increase
Solution Approach 1:
The system dynamically adjusts engine operation based on real-time battery state of charge. The controller monitors battery charge levels and automatically transitions between two operational states: (1) engine runs at constant speed when batteries require charging, and (2) engine shuts down completely when batteries have sufficient charge and the inverter can supply the load independently, thereby eliminating unnecessary fuel consumption while maintaining power availability.
Solution Approach 2:
The system ensures continuous useful action through the inverter, which can continuously supply AC power to the load from the battery storage without requiring continuous engine operation. This allows the useful function of power supply to continue uninterrupted while the engine operates only intermittently when needed for battery recharging.
3Stability of the object's composition
If the engine runs at constant speed regardless of load, then the generator provides stable power output, but unnecessary fuel is consumed when power usage is light
Solution Approach 1:
The system dynamically switches between two stable power supply modes: engine-driven generation (when batteries need charging) and inverter-driven generation from batteries (when load is light). The controller manages this dynamic transition, ensuring stable power output in both modes while eliminating unnecessary fuel consumption during light load conditions by shutting down the engine completely when the inverter can independently supply the load.
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 reduces noise, fuel consumption, and pollution by minimizing engine operation time, while increasing efficiency and extending battery-powered operation, especially during light loads.
Implementation Method 1
a DC generator, coupled to the engine for producing direct current ("DC") electricity
Implementation Method 2
The inverter converts DC electricity produced by the DC generator and DC electricity discharged from the one or more battery cells to alternating current ("AC") electricity
Implementation Method 3
one or more battery cells, which can be recharged using DC electricity from the DC generator
Data Source
AI summary
A generator set. In one embodiment, the generator set includes an internal combustion engine, a DC generator, one or more battery cells, and an inverter. The DC generator is coupled to the engine and produces direct current (“DC”) electricity. The battery cells discharge stored DC electricity and can be recharged using DC electricity from the DC generator. The inverter is electrically connected to the DC generator and to the battery cells. The inverter converts DC electricity produced by the DC generator and DC electricity discharged from the one or more battery cells to alternating current (“AC”) electricity. The AC electricity is available for use by a load.