Six-Cylinder Opposed Free Piston Engine Generator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional diesel engines have low power generation efficiency due to complex mechanical structures, and existing free piston generators face reliability issues and low power density, making them difficult to popularize.
Innovation Solution
A six-cylinder opposed free piston internal combustion engine generator design replaces the return device with a dual piston dual cylinder type free-piston internal combustion engine linear generator, incorporating two free piston internal combustion engine sets, one opposed piston internal combustion engine set, and two linear generator sets, with a stator coil, motor shell, generator rotor, rotor mandrel, and spring, to improve power generation efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional diesel engine is used for power generation, then the mechanical structure is complex, but the power generation efficiency is low
Solution Approach 1:
The engine is divided into two independent piston systems (free piston and opposed piston) that operate separately but coordinate through a shared connecting rod. This segmentation allows direct linear motion conversion to electrical energy without complex crankshaft mechanisms, improving efficiency while maintaining structural functionality
Solution Approach 2:
The traditional crankshaft-connecting rod mechanism is replaced with a linear generator system that directly converts the linear reciprocating motion of pistons into electrical energy. This substitution eliminates complex mechanical transmission components and improves power generation efficiency
2Productivity
If a dual piston dual cylinder type free-piston internal combustion engine linear generator is used, then the power generation efficiency is improved, but the power density is low
Solution Approach 1:
The free piston engine and opposed piston engine are merged into a single integrated system sharing a common connecting rod and linear generator. This merging doubles the power output while maintaining the high efficiency benefits of free piston technology, thereby improving power density
Solution Approach 2:
The shared connecting rod serves multiple functions: it connects both free pistons and both opposed pistons, transmits force from all four pistons, and drives the linear generator. This multi-functionality increases power density by utilizing the same structural components for multiple power-generating purposes
3Power
If an opposed free piston generator with return device is used, then the power density is high, but the reliability is reduced
Solution Approach 1:
The return device is completely removed from the system. Instead of using a mechanical return mechanism, the invention uses the gas pressure from combustion and expansion to naturally reverse the piston motion, eliminating the failure-prone return device while maintaining high power density
Solution Approach 2:
The system uses its own combustion gas pressure to drive the pistons through both expansion and compression strokes. The high-pressure gas from combustion naturally pushes the pistons during expansion, and the same gas pressure differential drives the return motion during compression, making the system self-sufficient and eliminating external return mechanisms
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 design increases thermal efficiency and power generation efficiency by subjecting air to multi-stage compression and expansion, reduces heat transfer loss, and enhances reliability by simplifying the system, thus improving energy utilization and power output.
Implementation Method 1
the generator rotor cuts a magnetic induction line generated by the stator coil for power generation
Implementation Method 2
the spring is arranged between the generator rotor and the motor shell to limit movement of the rotor mandrel
Implementation Method 3
air is subjected to first-stage compression in the low-pressure cylinder set in the free piston internal combustion engine set and the opposed piston internal combustion engine set and then subjected to second-stage compression in the high-pressure cylinder set
Implementation Method 4
the intercooler and the exhaust gas communicating pipe are connected between the low-pressure cylinder set and the high-pressure cylinder set
Data Source
AI summary
The present disclosure provides a six-cylinder opposed free piston internal combustion engine generator. The generator comprises two free piston internal combustion engine sets, one opposed piston internal combustion engine set and two linear generator sets. Air entering cylinders is subjected to first-stage compression in low-pressure cylinder sets in the free piston internal combustion engine sets and the opposed piston internal combustion engine set and then subjected to second-stage compression in high-pressure cylinder sets, and a high pressure gas produced after the combustion is subjected to first-stage expansion in the high-pressure cylinder sets and then subjected to second-stage expansion in the low-pressure cylinder sets.