Rotary Engine Contour Mechanism for Low-Friction Combustion
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Solution Overview
Problem
Existing rotary engines face challenges in achieving high efficiency, compact design, and reduced friction while maintaining effective combustion cycles.
Innovation Solution
A rotary machine design featuring a fixed housing with oval shape, swinging arms with cam tracks and cam followers, or gears and eccentrics, and connecting rods, which allows for three combustion events per revolution, utilizing bearings for low friction and improved sealing, and integrated cooling and induction systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional rotary engine designs are used, then the engine structure is simpler, but friction is higher and sealing is less effective
Solution Approach 1:
The patent employs curved cam tracks and arc-shaped follower paths that guide the oscillating contours through smooth rotational motion. The cylindrical combustion chamber design with curved surfaces reduces friction compared to traditional linear mechanisms, while the overall rotary structure maintains relative simplicity
Solution Approach 2:
The patent introduces cam tracks as intermediary elements that mediate between the rotating shaft and the oscillating contours. These cam tracks provide a controlled path that reduces direct friction contact while maintaining the necessary mechanical coupling, effectively reducing energy loss without significantly increasing complexity
2Volume of moving object
If compact design is pursued, then the engine size is reduced, but achieving high compression ratios becomes more difficult
Solution Approach 1:
The patent utilizes the third dimension by creating an oscillating motion perpendicular to the rotation plane. The contours oscillate radially within the rotating shaft, allowing the combustion chamber volume to vary significantly in a compact footprint. This dimensional approach enables high compression ratios without increasing the engine's external dimensions
Solution Approach 2:
The patent employs dynamically oscillating contours that change position during rotation, creating variable compression ratios throughout the cycle. The contours move between inner and outer radii, dynamically adjusting the combustion chamber volume to achieve high compression during the power stroke while maintaining a compact overall engine size
3Productivity
If three combustion events per revolution are achieved, then productivity increases, but the design complexity increases
Solution Approach 1:
The patent designs the oscillating contour mechanism to perform multiple functions simultaneously: it creates the combustion chamber, guides the intake and exhaust ports, and generates the three combustion events per revolution through its oscillation pattern. This multi-functionality achieves high productivity without proportionally increasing mechanical complexity
Solution Approach 2:
The patent maintains continuous rotational motion with three combustion events occurring in sequence during each revolution. The oscillating contours continuously cycle through expansion and compression phases, ensuring uninterrupted power delivery. This continuous action maximizes productivity while the rotary design keeps the mechanism relatively simple compared to multi-cylinder alternatives
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 achieves high efficiency, compact size, and reduced friction, enabling three combustion cycles per revolution with improved sealing and temperature regulation, enhancing overall engine performance.
Implementation Method 1
use swinging arms which pivoting about a shaft with cam tracks and cam followers to create the functional motion
Implementation Method 2
guided by rollers or pads that contact cam rings which are lubricated by an oil film
Implementation Method 3
cam rings which are lubricated by an oil film
Implementation Method 4
The rotary machine can be used to combust an air-fuel mixture that releases chemical energy and produces usable work
Data Source
AI summary
The disclosure provides rotary machines that include, in one embodiment, a rotatable shaft defining a central axis A, the shaft having a first end and a second end. The shaft can have a first hub disposed thereon with a plurality of cavities. At least one contour is slidably received into an arcuate cavity in an exterior surface of the hub. The contour has a convex outer surface that cooperates with an inwardly facing curved surface of a housing to form a working volume.