Non-Circular Cam Crank Mechanism for Extended Power Stroke
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Solution Overview
Problem
Current technologies for muffler cap spinning and engine crankshaft mechanisms face challenges in efficiently converting non-circular motion to linear motion and vice versa, leading to suboptimal performance and fuel efficiency due to the limitations of existing mechanical systems.
Innovation Solution
The introduction of six methods that utilize a sliding arm and adjustable closure to translate non-circular cam motion into linear motion for muffler cap spinning, and reverse application for engine crankshaft to extend power stroke length, incorporating geometric configurations and spring mechanisms to enhance efficiency and reduce vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a normal crankshaft is used with equal stroke length for intake and power strokes, then the mechanical structure is simple, but the power generated is wasted due to the piston not being able to travel further down the cylinder in power stroke
Solution Approach 1:
The patent applies the cap spinner mechanism in reverse for the crankshaft. Instead of using a circular cam, it employs a non-circular cam where the roller follows a non-circular path that translates to extended linear motion of the sliding arm. This inversion of the conventional crankshaft approach enables the piston to travel further during the power stroke, extracting more work from the expanding gas before intake begins.
Solution Approach 2:
The crankshaft mechanism is segmented into distinct functional components: a non-circular cam with a specific geometric profile, a roller that follows the cam path, a sliding arm that converts the roller's motion to linear piston movement, and a closure mechanism. This segmentation allows each component to be optimized for its specific function while working together to achieve the extended power stroke.
2Productivity
If a non-circular cam mechanism is used to extend power stroke length, then the power generation efficiency is improved, but the device complexity increases
Solution Approach 1:
The non-circular cam mechanism serves multiple functions: it defines the extended power stroke geometry, guides the roller along its path, and works with the sliding arm to convert rotational to linear motion. The closure mechanism provides both geometric definition and mechanical constraint. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall system complexity.
3Manufacturing precision
If the roller follows a non-circular path to enable longer power stroke, then the linear motion conversion efficiency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The non-circular cam profile is defined by specific geometric parameters including the major axis length, minor axis length, and the position of the roller contact point. By carefully selecting and optimizing these parameters, the cam can be manufactured using conventional machining processes while achieving the desired extended power stroke geometry and motion conversion precision.
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
These methods improve the efficiency of muffler cap spinning and engine crankshaft operations by enabling more precise and efficient motion conversion, reducing vibration, and enhancing fuel efficiency by allowing a longer power stroke, thus improving overall performance and reducing costs.
Implementation Method 1
incorporating geometric configurations and spring mechanisms to enhance efficiency and reduce vibration
Data Source
AI summary
Sets of apparatus for translating motion from a rotating non-circular loop to linear motion and in possible cases vice versa. Such mechanisms are used in muffler cap spinning technology and engine crankshaft with uneven strokes; but not restricted to said applications. The mechanisms include a non-circular cam, a linear sliding arm or piston and parts to connect them. Disclosure also includes an adjustable closure for a sliding arm which could be utilized for said muffler cap spinning mechanisms or other applications.