Dynamic Rotary Engine Vane Actuation for Sealing and Efficiency
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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 dynamic vane actuation system that extends or retracts vanes to optimize seal formation and expansion chamber volume, enhancing power stroke efficiency and reducing back pressure through exhaust systems and lip seals.
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 applies dynamics by making the vane length variable through a actuation mechanism that extends or retracts the vane based on engine operating conditions. This dynamic adjustment allows the expansion chamber volume to be optimized in real-time, improving combustion efficiency and power output while reducing energy losses from incomplete combustion.
Solution Approach 2:
The patent changes the geometric parameter of the expansion chamber by varying the vane length. This parameter change allows the engine to adapt to different operating conditions, optimizing the expansion ratio to improve combustion completeness and reduce energy losses from unburnt hydrocarbons and other pollutants.
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 combines features of both internal and external combustion engines into a single rotary engine design. The engine uses an internal combustion chamber but employs an external vane actuation mechanism with extension and retraction capabilities, creating a multi-functional system that achieves efficient combustion without the complexity of dedicated external combustion systems.
Solution Approach 2:
The dynamic vane adjustment mechanism allows the engine to optimize its geometry during operation, achieving efficient expansion ratios without requiring multiple specialized components. This reduces device complexity while maintaining high combustion efficiency.
3Power
If vane length is extended to increase expansion chamber volume, then power is improved, but back pressure increases reducing efficiency
Solution Approach 1:
The patent uses a dynamic actuation mechanism to adjust vane length based on real-time engine conditions. During power strokes, the vane extends to maximize expansion chamber volume and power output. During exhaust strokes, the vane retracts to reduce back pressure and facilitate efficient exhaust gas evacuation, thus resolving the contradiction between power and back pressure.
4Loss of energy
If dynamic vane actuation is implemented to optimize expansion chamber volume, then efficiency is improved, but device complexity increases
Solution Approach 1:
The vane actuation mechanism is designed to be self-regulating, using the engine's own operating parameters (such as pressure differentials or rotational position) to automatically adjust vane length without requiring complex external control systems. This reduces the overall device complexity while maintaining high energy conversion efficiency.
Data Source
AI summary
The invention comprises a rotary engine apparatus and method of use thereof. The rotary engine comprises a rotor configured to rotate in a housing and a set of vanes separating a volume between the rotor and housing into a set of chambers. Each of the vanes are dynamically controlled, such as through use of a stressed sheet and/or electromechanical means, to: (1) yield a greater radially outward and/or sealing force to the housing at start-up and/or at low engine speeds and (2) dynamically reduce radially outward and/or sealing forces at higher engine speeds.