Free Piston Engine Variable Stroke Linear Generator
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Solution Overview
Problem
Existing free piston linear power generators face challenges in efficiently converting mechanical energy into electrical energy due to limitations in the design of the free piston engine and synchronization of piston motion with the magnetic field, leading to suboptimal performance.
Innovation Solution
A free piston engine with a linear power generation system featuring a double-ended piston within a cylinder with opposed combustion chambers, where the piston stroke is variably adjustable through controlled combustion cycles, allowing for optimal working conditions and synchronization with a magnetic field generated by coaxial coils, enabling efficient energy conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the piston stroke is fixed in conventional free piston linear power generators, then the structure is simpler, but the energy conversion efficiency is suboptimal because it cannot adapt to different working conditions
Solution Approach 1:
The patent implements variable piston stroke by dynamically adjusting the position of the piston stopper along the cylinder wall, allowing the stroke length to change based on operating conditions. This dynamic adjustment mechanism enables the system to optimize energy conversion efficiency across different loads and applications, resolving the contradiction between fixed structure simplicity and adaptive performance.
Solution Approach 2:
The patent changes the geometric parameter of piston stroke length by providing adjustable stopper positions at different heights within the cylinder. This parameter adjustment allows the system to adapt to varying working conditions, improving energy conversion efficiency without requiring a complete redesign of the power generation system.
2Adaptability or versatility
If the piston stroke is variable and adjustable, then the adaptability to different applications is improved, but the device complexity increases
Solution Approach 1:
The patent creates a universal free piston linear power generator that can serve multiple applications by adjusting the piston stroke. The same basic engine structure can be adapted to different power requirements and operational conditions through stroke adjustment, making the system versatile without requiring multiple dedicated designs for different applications.
Solution Approach 2:
The patent incorporates pre-positioned stopper locations or adjustable stopper mechanisms that are prepared in advance, allowing the piston stroke to be configured for different applications before operation begins. This preliminary configuration capability enables the system to adapt to various applications while maintaining a relatively simple control structure.
3Reliability
If the piston stroke is shortened to meet specific working conditions, then the synchronization with magnetic field is improved, but the total energy output may be reduced
Solution Approach 1:
The patent dynamically adjusts the piston stroke length to achieve optimal synchronization between piston motion and magnetic field cycles. By varying the stroke rather than using a fixed length, the system can maintain high synchronization accuracy across different operating conditions while compensating for energy output variations through adjusted combustion timing and intensity.
Solution Approach 2:
The patent changes the piston stroke parameter to optimize the synchronization between mechanical motion and electromagnetic field interaction. This parameter adjustment allows the system to achieve reliable synchronization for efficient energy conversion while the overall power output is maintained through controlled combustion processes in the combustion chambers.
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 achieves efficient energy conversion by allowing adjustable piston stroke and synchronization with the magnetic field, enhancing the efficiency and adaptability of the free piston engine for various applications.
Implementation Method 1
The piston is of a material that is permeable to magnetic flux
Implementation Method 2
Combustion is effected in the first and second combustions chambers in an alternating pattern to cause the piston to reciprocate within the cylinder, thereby generating electric current in the second coil
Data Source
AI summary
A free piston engine with a linear power generation system with a variable stroke piston and improved construction and control is provided. The free piston engine includes a single double-ended piston located within a cylinder having opposed combustion chambers positioned at opposite ends of the cylinder. The piston is reciprocated within the cylinder between the opposed combustion chambers. The piston stroke is variably adjustable via the combustion cycles of the free piston engine and the linear power generation system such that the top dead centers of each side of the piston are definable. The piston stroke can then be adjusted to meet the optimum working conditions for a respective application.