Electric Power Split Hybrid System with Switching Part
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Solution Overview
Problem
Hybrid motorcycles face shorter battery life and larger battery volume due to frequent charging and discharging in electric mode, and lower fuel economy benefits as the engine cannot maintain a medium-speed high-efficiency status in fuel-driven mode.
Innovation Solution
An electric power split hybrid system incorporating a case, one-way clutches, an engine, generator, motor, transmission mechanism, planetary gear frame, and switching part, allowing for three operating modes that optimize battery usage and engine efficiency to extend battery life and reduce volume while enhancing fuel economy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the electric driving mode is used more frequently to save energy, then the battery life is shortened and battery volume increases, but fuel economy benefit is reduced
Solution Approach 1:
The patent introduces a switching part as an intermediary device that manages power flow between the generator, motor, and battery. This switching mechanism enables the system to selectively charge the battery from the generator during engine operation, reducing the burden on the battery and extending its life while maintaining energy-saving benefits
Solution Approach 2:
The system dynamically switches between different operating modes (electric driving, hybrid driving, and engine-driven modes) based on real-time conditions. The switching part enables flexible power distribution, allowing the battery to be charged during engine operation rather than only during regenerative braking, thereby reducing charging cycles and extending battery life
2Quantity of substance
If the battery volume is increased to maintain driving ability for certain distances, then the battery life is extended, but the device complexity and cost increase
Solution Approach 1:
The switching part acts as a mediator that enables the generator to charge the battery during engine operation. This power management mechanism allows the system to maintain adequate battery electrical quantity with a smaller battery volume by dynamically charging it during hybrid operation, thereby reducing system complexity and cost
3Ease of operation
If the engine rotational velocity is adjusted to match wheel rotational velocity in fuel-driven mode, then the control simplicity is improved, but the fuel economy benefit decreases
Solution Approach 1:
The planetary gear frame set acts as a mechanical intermediary that decouples the engine rotational velocity from the wheel rotational velocity. This gear mechanism allows the engine to operate at its optimal medium-speed high-efficiency range while the wheels rotate at speeds required for different driving conditions, thereby maintaining fuel economy benefits without compromising control simplicity
Solution Approach 2:
The system changes the operational parameters by allowing the engine to maintain a constant medium-speed high-efficiency rotational velocity regardless of wheel speed requirements. The planetary gear mechanism transforms this constant engine speed into variable wheel speeds, enabling the engine to operate in its most efficient range while meeting diverse driving demands
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
The system effectively extends battery life, reduces battery volume, and improves fuel economy by optimizing battery usage and engine efficiency, allowing the engine to maintain a medium-speed high-efficiency status, thereby enhancing overall performance and market acceptance.
Implementation Method 1
a generator, which is used to start the engine, and is capable of adjusting a torque of the engine and of generating electricity via driving of the engine
Implementation Method 2
a motor; a transmission mechanism, which is used to link and move a wheel to rotate
Implementation Method 3
a first one-way clutch, which is fixed to the case and is capable of being set in a locked state and in a disengaged state, respectively; a second one-way clutch, which is fixed to the case and is capable of being set in a locked state and in a disengaged state, respectively
Data Source
AI summary
An electric power split hybrid system comprises a case, a linkage unit, an electric power part, and a switching part. An engine, a generator, a motor, and a transmission mechanism are installed in the case. The generator is used to start the engine, and is capable of adjusting a torque of the engine and of generating electricity via driving of the engine. The transmission mechanism is used to link and move a wheel to rotate. The linkage unit is used to link and move the engine and the motor. The electric power part is used to store electrical energy generated by the generator and to supply electric power to the motor. The switching part is connected to the generator, the motor, and the electric power part. Electric power generated by the generator is switched by the switching part to supply to one of the motor and the electric power part.