Three-Cycle Radial Vane Piston Engine With Slider-Crank Drive
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Solution Overview
Problem
Existing rotary internal combustion engines face challenges in complexity, efficiency, and performance due to their design configurations.
Innovation Solution
A three-cycle radial vane piston engine with centrally pivoted radial vanes, a power section, and a drive mechanism, featuring no-contact labyrinth sealing, lightweight materials, and a compressor integrated into the engine block, along with a slider-crank mechanism for balanced motion and optimized thermal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If meshed scissor-type radial pistons are employed in a cylindrical casing, then multiple chambers with drive mechanism are formed providing two cycles per rotation, but device complexity increases
Solution Approach 1:
The engine divides the combustion process into three distinct strokes (compression, combustion, expansion) occurring in separate chambers around the rotor, allowing each chamber to complete a full cycle independently. This segmentation enables three cycles per rotation while maintaining a compact rotary structure.
Solution Approach 2:
The rotor simultaneously performs multiple functions: it acts as the moving wall for all chambers, houses the intake and exhaust valves, and provides the mechanical output through its rotation. This multi-functionality reduces overall device complexity despite achieving three cycles per rotation.
2Productivity
If multiple independent sliding vanes are utilized within an off-center rotor, then chambers are formed allowing for two or four cycle operation, but device complexity increases
Solution Approach 1:
The patent merges the piston, cylinder wall, and valve mechanisms into a single integrated rotor assembly. The radial vanes are directly attached to the rotor, eliminating the need for separate piston assemblies and reducing the number of independent components required for two or four cycle operation.
Solution Approach 2:
The rotor is nested within the stator housing, with the radial vanes nested within the rotor body. This nested configuration allows multiple chambers to be formed within a compact structure, enabling two or four cycle operation without proportionally increasing device complexity.
3Loss of energy
If lightweight materials such as titanium alloys are used for vanes, then inertial losses are minimized, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs titanium alloys for the radial vanes, which are lightweight yet high-strength materials. This choice reduces the mass of moving parts and minimizes inertial losses during rapid acceleration and deceleration of the vanes, while the advanced material properties allow for precise manufacturing through modern fabrication techniques.
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 a simplified, compact design with enhanced efficiency and performance by minimizing friction, wear, and inertial losses, while providing additional utility as a compressor and pump.
Implementation Method 1
The vanes allow for no-contact labyrinth sealing, enabling oil-free operation.
Implementation Method 2
The slider/shaft joint unit includes a bearing assembly to reduce friction and wear.
Implementation Method 3
a spark plug, fuel injector
Data Source
AI summary
A three-cycle radial vane piston internal combustion engine comprising an engine block integrating a cylindrical power casing, drive box, and compressor. The power casing includes air inlet, fuel injector, spark plug, and exhaust outlet ports, and houses three or more meshed radial vane pistons mounted on centrally located coaxial shafts forming three or more chambers. The coaxial shafts extend into the drive box, each shaft having a radial crank with a bushing at its end. The bushing is fitted with a slider/shaft joint unit with the slider side is sliding within radial slots of an off-center flywheel. The crank, slider/shaft joint, radial slot, and off-center flywheel form an inverted slider-crank mechanism linking the vanes' motion through the flywheel slots. The cyclically varying chamber volumes enable combined intake and exhaust, compression, and power strokes. The engine incorporates a compressed air kick start system for starting without a starter motor.