Split-Chamber Rotary Engine with Pressure Controller and Vane
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Solution Overview
Problem
Conventional piston engines face inefficiencies due to maximum pressure at Top Dead Center producing little torque, high friction, limited compression rates due to auto-ignition issues, and inefficient energy use, while rotary engines struggle with variable compression ratio control and high sealing forces in vane designs.
Innovation Solution
A split-chamber rotary engine with a pressure controller for linear compressors and a pressure compensating vane design that separates compression and motor mechanisms, allowing for variable compression ratio and reduced sealing forces, enabling efficient energy use and reduced pollution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional piston engines operate at maximum pressure at Top Dead Center, then combustion efficiency is improved, but torque production is reduced because the moment-arm is close to zero
Solution Approach 1:
The engine cycle is segmented into distinct compression and power modules operating at different phases. The compression module compresses air during one phase while the power module generates torque during another phase, allowing optimal conditions for both combustion efficiency and torque production to be achieved at different times in the cycle.
Solution Approach 2:
The system dynamically switches between compression and power generation modes. The compression ratio and timing are dynamically adjusted throughout the cycle, with the compression module operating at high compression ratios when needed, then transitioning to power generation at optimal torque-producing angles.
2Use of energy by moving object
If compression ratio is increased to improve efficiency, then energy efficiency is improved, but auto-ignition occurs prematurely due to elevated temperature
Solution Approach 1:
The compression and combustion processes are segmented into separate modules. The compression module achieves high compression ratios for efficiency, while the power module receives the compressed air and controls combustion timing separately, preventing premature auto-ignition while maintaining high efficiency.
Solution Approach 2:
Compressed air is stored as an intermediary in the compression module before being transferred to the power module. This allows the compressed air to be held at high pressure without immediate combustion, then introduced to the power module where combustion is controlled at the optimal moment, preventing premature ignition.
3Speed
If multiple cylinders are incorporated to mitigate inefficient torque delivery, then power continuity is improved, but device complexity increases
Solution Approach 1:
The single-cylinder engine employs periodic action by alternating between compression and power generation phases in a two-stroke cycle. Power is delivered in periodic bursts at optimal moments, and the free-piston design allows the cycle to repeat efficiently, providing adequate power continuity without requiring multiple cylinders.
4Reliability
If vane tip sealing forces are increased to reduce leakage, then sealing performance is improved, but the forces required become excessively high
Solution Approach 1:
The mechanical spring-based sealing system is replaced with a magnetic coupling system. Magnetic fields provide the sealing force at the vane tip, eliminating the need for high mechanical forces while maintaining effective sealing. The magnetic coupling transfers power through the housing wall without requiring physical contact or high sealing forces.
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 engine achieves near stoichiometric combustion, reduced emissions, and high torque at lower speeds, eliminating the need for expensive additives and gearboxes, while minimizing energy waste and pollution, with a simpler design that conserves energy and reduces production costs.
Implementation Method 1
a pressure controller for linear compressors and a pressure compensating vane design that separates compression and motor mechanisms, allowing for variable compression ratio
Implementation Method 2
a pressure compensating vane design that separates compression and motor mechanisms, allowing for variable compression ratio and reduced sealing forces
Implementation Method 3
controlling the pressure permits the motor to run with a near stoichiometric mixture through its power demand range, improving efficiency and minimizing pollution
Data Source
AI summary
This invention relates to the field of internal combustion engines and compressors in general and to linear compressors, in particular these used as in U.S. Pat. No. 8,056,527, by accurately controlling the pressure being delivered into the combustion chambers of said engine while returning unused energy of the compression phase into the motor for complete expansion.Another improvement relates to a pressure compensated vane to be used inside grooves of the motor assembly rotor. This invention enables the vane to seal against the cavity of the housing tightly with minimal force.