Piston Cam Drive Rotated Abutting Faces Eliminate Lateral Oscillations
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Solution Overview
Problem
Internal combustion engines with eccentric cams experience lateral oscillations due to perpendicular abutting faces, leading to inefficient energy transfer and erratic operation.
Innovation Solution
The use of rotated abutting faces within the piston, determined by a formula that calculates the inclination as a function of the cam's eccentricity, eliminates lateral oscillations by ensuring a consistent slope, allowing for smooth energy transfer without losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If parallel abutting faces perpendicular to the axis of reciprocation are used, then the structure is simple and easy to manufacture, but lateral oscillations occur and energy transfer is inefficient
Solution Approach 1:
The patent changes the geometric parameters of the abutting faces by rotating them away from the perpendicular orientation to a specific angle determined by the cam's eccentricity. This parameter change eliminates lateral oscillations and improves energy transfer efficiency while maintaining manufacturing feasibility through a clear geometric definition.
2Device complexity
If parallel abutting faces perpendicular to the axis of reciprocation are used, then the structure is simple, but lateral oscillations cause erratic operation and reduced stability
Solution Approach 1:
By changing the orientation parameter of the abutting faces from perpendicular to a specific angle based on cam eccentricity, the patent eliminates lateral oscillations and achieves stable operation at constant velocity without increasing structural complexity.
Solution Approach 2:
The rotated abutting faces create a geometric relationship that ensures uniform force distribution and constant velocity operation, achieving a form of equipotentiality in the energy transfer process and eliminating operational erraticity.
3Ease of manufacture
If perpendicular abutting faces are used, then manufacturing is straightforward, but energy transfer losses occur due to lateral oscillations
Solution Approach 1:
The patent modifies the geometric parameter of the abutting faces by rotating them to a specific angle determined by cam eccentricity. This change eliminates lateral oscillations that cause energy losses, thereby improving power transfer efficiency while keeping the manufacturing process straightforward.
Data Source
AI summary
The subject of invention is a method to derive specifications for an eccentric cam located in a void within the piston of an IC engine which will have parallel faces abutting the cam. These faces will drive the cam in a rotary fashion and transmit the energy produced by the piston by means of the cams axle. The method employs two variables: (a) the radius of the cam; (b) the degree of its eccentricity. These determine the slope of these abutting faces which will be rotated from the plane that is perpendicular to the axis of reciprocation. This slope is eccentric specific and produce a unique solution in each instance. This slope will be the same regardless of the cams radius. The result is an engine with no lateral oscillations.