Opposite Radial Rotary-Piston Engine Side Force Absorption
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Solution Overview
Problem
Existing rotary-piston engines face issues with side pressure, vibration, friction losses, and short operation resource due to complex designs and balancing challenges, leading to inefficient fuel consumption and reduced power output.
Innovation Solution
A two-stroke opposite radial rotary-piston engine design featuring a rotor with a closed symmetrical ellipse or Cassini operation surface, utilizing oppositely movable pistons and plungers to absorb side and inertial forces, reducing friction through a simplified design and efficient lubrication system, allowing high-speed operation and improved power-to-weight ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a four-stroke engine with revolving cylinder block and rotatable sliding valve is used, then valve control is achieved, but device complexity increases and operation resource decreases due to complicated sealing means
Solution Approach 1:
The patent removes the complex rotatable sliding valve system from the engine design. Instead, it uses fixed ports in the cylinder block that are timed with the rotor rotation to control inlet and outlet flows, eliminating the need for moving valve components and their associated sealing mechanisms.
Solution Approach 2:
Rather than using a rotatable valve to control flow through fixed ports, the patent inverts the approach by using fixed ports and controlling flow through the rotation of the rotor itself, which brings the pistons and combustion chambers into alignment with the ports at appropriate times in the cycle.
2Ease of operation
If a revolving cylinder block with linearly reciprocating pistons is used, then piston motion is achieved, but balancing difficulty increases causing intensive vibrations
Solution Approach 1:
The patent inverts the traditional approach by keeping the cylinder block stationary and allowing the rotor to rotate instead. This eliminates the complex balancing requirements of a revolving cylinder block while still achieving the desired reciprocating piston motion through the rotational movement of the rotor.
Solution Approach 2:
The patent employs counterbalancing weights integrated into the rotor assembly to offset the centrifugal forces generated by the rotating pistons and combustion chambers, reducing vibrations without requiring a complex external balancing mechanism.
3Extent of automation
If a rotatable sliding valve system is used for inlet/outlet control, then valve function is achieved, but operation resource decreases to typically 100 hours maximum due to limited sealing means life
Solution Approach 1:
The patent completely removes the rotatable sliding valve system and its associated sealing means. Inlet and outlet control is achieved through fixed ports in the cylinder block that are timed with rotor rotation, eliminating the moving valve components that had limited service life.
4Power
If a cylinder block revolving around and impelling a rotor is used, then power generation is achieved, but reaction forces on support bearings increase leading to short operation resource
Solution Approach 1:
The patent inverts the traditional configuration by keeping the cylinder block stationary and allowing the rotor to rotate independently. This eliminates the large reaction forces on support bearings that occur when the entire cylinder block revolves, while still achieving power generation through the rotational motion of the rotor driven by the expanding gases.
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 long operation resource, low fuel consumption, high power torque, and reduced pollution, with the ability to operate efficiently at high RPMs, effectively competing with traditional engines in various applications.
Implementation Method 1
The plungers are disposed in each tube with end bushings, essentially less than the first gap. The plungers are attached to the traverses and oppositely movable, also including through throttling channels, outward surfaces forming external spaces with the bushings, and inward surfaces forming an internal space with the tube sidewalls, which internal space communicates with the oil supply means and the oil withdraw means.
Implementation Method 2
The engine absorbs side and inertial forces, is more efficient and clean. The design solutions embodied in the engine's lubrication and cooling systems allow exploiting the engine at 12000-15000 rpm
Data Source
AI summary
A two-stroke opposite rotary-piston engine comprises a cylinder block including a sleeve and two pistons slidely disposed therein, oppositely movable forming a common combustion chamber and a first gap with sleeve's sidewalls, a rotor having a surface formed by an ellipse or Cassini line, traverses attached to the pistons, rollers attached to the traverses and springly depressed against the rotor, oil tubes with end bushings, oil supply and withdraw means, two plungers disposed in each tube forming a second gap essentially less than the first. The plungers are attached to the traverses and oppositely movable, including through channels, outward surfaces with the bushings forming external spaces, and inward surfaces with the tube sidewalls forming an internal space communicating with the oil supply and withdraw means. Oil drain means communicate the external spaces with the oil supply means. The engine absorbs side and inertial forces, is more efficient and clean.