Rotary Engine Vane Drive Using Stressed Band Actuation
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Solution Overview
Problem
Internal combustion engines suffer from poor efficiency and pollution due to incomplete combustion, while external combustion engines are more complex and costly due to high rotational speeds and specialized designs.
Innovation Solution
A rotary engine with a vane extension apparatus that uses a stressed band to alternately extend or retract vanes, aiding in seal formation and exhaust, and includes features like lip seals, cap seals, and swing vanes to enhance efficiency and power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If internal combustion engines are used to achieve high power output, then power is improved, but efficiency deteriorates due to incomplete combustion and pollution
Solution Approach 1:
The patent replaces the traditional internal combustion mechanical system with a rotary engine system that uses adiabatic expansion of compressed air. Instead of relying on explosive combustion, the system uses mechanical compression and thermal expansion principles to generate power, eliminating incomplete combustion losses and pollution while maintaining power output.
Solution Approach 2:
The patent changes the fundamental operating parameters from combustion-based pressure generation to adiabatic expansion-based pressure generation. By compressing air to high pressure and temperature, then allowing it to expand adiabatically in the rotary engine, the system achieves efficient energy conversion without combustion losses, directly resolving the efficiency-power contradiction.
2Loss of energy
If external combustion engines are used to improve combustion efficiency, then efficiency is improved, but device complexity increases due to high rotational speeds and specialized designs
Solution Approach 1:
The patent replaces complex external combustion mechanisms with a simplified rotary engine system that uses adiabatic expansion. The system eliminates combustion chambers, fuel injection systems, and complex valve mechanisms, achieving high efficiency through pure mechanical compression and expansion in a simple rotary configuration with vanes and seals.
Solution Approach 2:
The rotary engine is divided into discrete functional segments including compression chambers, expansion chambers, and exhaust pathways. The use of multiple vanes creates segmented working spaces that sequentially perform compression, expansion, and exhaust functions, simplifying the overall design while maintaining high efficiency through modular functional organization.
3Loss of energy
If vanes are extended to improve seal formation and reduce back pressure, then efficiency is improved, but device complexity increases
Solution Approach 1:
The vane mechanism uses dynamic extension and retraction of vanes during rotation to optimize sealing and reduce back pressure. The vanes extend into the housing during the power stroke to improve sealing, then retract during other strokes to reduce resistance, adapting their position dynamically to maintain efficiency while managing complexity through motion-based functionality.
Solution Approach 2:
The patent employs flexible lip seals and cap seals on the vanes that can deform and conform to the housing surfaces, creating effective seals without rigid complex mechanisms. The flexible sealing elements adapt to variations in vane position and housing geometry, achieving low back pressure through elastic deformation rather than mechanical complexity.
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 rotary engine design improves efficiency and power by maintaining adiabatic expansion and reducing back pressure, leading to increased energy conversion and reduced pollution.
Implementation Method 1
a stressed band wound at least partially around two or more rollers in an enclosure to alternatingly extend or retract a vane
Implementation Method 2
The rotary engine design improves efficiency and power by maintaining adiabatic expansion
Implementation Method 3
features like lip seals, cap seals, and swing vanes to enhance efficiency and power output
Data Source
AI summary
The invention comprises a rotary engine method and apparatus configured with a self-actuating/self-damping vane system. In the rotary engine apparatus, a set of vanes extend from a rotor to a housing, whereby the rotary engine is divided into expansion chambers. Each of the vanes enclose a stressed band wound at least partially around two or more rollers. Potential energy of the stressed band, which is optionally a smart metal, provides a radially outward force on the vane toward the housing, aiding in seal formation of the vane to the housing.