Rotary Engine Retractable Barriers for Combustion Control
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Solution Overview
Problem
Conventional internal combustion engines face inefficiencies due to energy-intensive compression steps, vibration, energy losses, and leakage of combustion gases, as well as limitations in fuel vaporization and pollutant production.
Innovation Solution
A rotary internal combustion engine design featuring a rotatable inner and outer housing with retractable barriers that divide the enclosure into combustion and exhaust chambers, eliminating the need for compression and allowing for expanded combustion before ignition, improving fuel vaporization and reducing emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a compression step is used in conventional engines, then the fuel combustion efficiency is improved, but the starting energy requirement and component weight increase significantly
Solution Approach 1:
The patent inverts the conventional sequence by eliminating the compression step that precedes combustion. Instead of compressing then combusting, the system allows combustion to occur in an expanding chamber, fundamentally reversing the traditional thermodynamic cycle sequence to reduce starting energy requirements while maintaining combustion efficiency
Solution Approach 2:
The patent changes the thermodynamic parameters by operating without a compression stroke. The chamber volume continuously expands during operation, and combustion occurs at atmospheric or near-atmospheric pressure rather than high compression pressure, fundamentally altering the pressure-volume relationship of the conventional engine cycle
2Power
If reciprocating pistons are used, then the engine can convert thermal energy to mechanical work, but vibration and energy losses occur due to constant momentum changes
Solution Approach 1:
The patent replaces linear reciprocating motion with rotary motion. The combustion chamber rotates continuously, converting thermal energy directly into rotational mechanical work without the back-and-forth piston movement, thereby eliminating vibration caused by momentum changes and reducing energy losses
Solution Approach 2:
The patent substitutes the reciprocating piston-mechanism with a rotating chamber system. Instead of using connecting rods, crankshafts, and valves to convert linear motion to rotary motion, the system directly rotates the combustion chamber itself, simplifying the mechanical system and eliminating associated vibrations and energy losses
3Device complexity
If the intake and exhaust ports are open during the power cycle, then the engine operation is simplified, but unburned fuel is lost through exhaust
Solution Approach 1:
The patent maintains continuous rotation and continuous combustion without interrupting the process for valve operations. The rotating chamber design allows the combustion process to continue uninterrupted, with exhaust gases naturally expelled during rotation, preventing unburned fuel loss while maintaining operational simplicity
Solution Approach 2:
The patent ensures complete combustion occurs before the chamber rotates to the exhaust position. By completing the combustion process in advance during the power stroke portion of rotation, the system prevents unburned fuel from entering the exhaust, addressing the fuel loss issue before it occurs
4Device complexity
If turbines are used with open channels from intake to exhaust, then the structure is simplified, but energy efficiency decreases due to inability to harness external pressure sources
Solution Approach 1:
The patent segments the combustion chamber into isolated regions during different phases of rotation. The chamber is divided into an intake region, a combustion region, and an exhaust region at different rotational positions, allowing controlled separation of functions while maintaining continuous rotation, thus improving energy efficiency without excessive complexity
Solution Approach 2:
The patent uses dynamic sealing and rotating barriers to control the isolation and connection of chamber regions during rotation. The barriers dynamically seal off the combustion chamber from intake and exhaust ports at appropriate rotational positions, enabling efficient pressure management and energy harnessing while maintaining the simplicity of continuous rotary operation
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 results in a compact, efficient engine with reduced starting energy, lower operating temperatures, and increased fuel efficiency, capable of using lower quality fuels and producing fewer pollutants, while minimizing vibration and backpressure.
Implementation Method 1
At least two barriers are disposed in the enclosure, and at least one of the barriers is rotatable relative to at least one other barrier and at least one of the barriers comprises a retractable barrier mounted along a pivot axis and pivotable between an extended position in which the at least one retractable barrier extends into the enclosure and a retracted position in which the at least one retractable barrier retracts from the extended position. The enclosure is divided into a combustion chamber and an exhaust chamber when the at least one retractable barrier is in the extended position.
Implementation Method 2
an ignition source disposed in the combustion chamber for igniting a mixture of fuel and combustion fluid
Implementation Method 3
the combustion of the fuel and the expansion of the resulting gases which act on the engine part
Data Source
AI summary
A rotary internal combustion engine includes outer and inner housings defining an enclosure therebetween, and first and second side housings disposed on opposite sides of the outer housing. The inner housing is rotatable relative to the outer housing and at least two barriers divide the enclosure into a combustion chamber and an exhaust chamber. At least one barrier is rotatable relative to at least one other barrier and at least one barrier comprises a retractable barrier mounted along a pivot axis and is pivotable between an extended position and a retracted position. An intake port, exhaust port, and ignition source are also provided. The rotary internal combustion engine further includes a cylindrical stationary shaft disposed inside the inner housing and oriented substantially coaxially with the inner housing. The stationary shaft has an intake opening configured to be intermittently fluidly connected with the intake port.