Dual-Piston Engine Layout for Vibration-Balanced Power Delivery
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Solution Overview
Problem
Internal combustion engines with single cylinders, commonly used in outdoor power equipment, face limitations in performance and efficiency due to their design, particularly in terms of vibration management and power delivery.
Innovation Solution
The implementation of a multiple cylinder internal combustion engine design, where a second piston in a second cylinder is coupled with the first piston's crankshaft to counterbalance vibrations and tune vibrational characteristics, enhancing rotational motion and power generation through a crankshaft connected to both pistons, with features like offset configurations and return springs for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cylinder engine is used, then the device complexity is reduced and manufacturing cost is lowered, but vibration management deteriorates and power delivery becomes less efficient
Solution Approach 1:
The patent applies the counterweight principle by adding a second piston-crankshaft system that generates opposing vibrational forces to balance the primary cylinder's vibrations. The second piston is configured with specific offset distances and crankshaft positioning to create counterbalancing motion that reduces net vibration output, directly addressing the harmful vibrational effects of single-cylinder engines while maintaining operational simplicity.
2Device complexity
If a single cylinder engine is used, then the device complexity is reduced, but power delivery efficiency deteriorates
Solution Approach 1:
The patent merges the functionality of a single cylinder with the benefits of multi-cylinder power delivery by integrating a second piston-crankshaft system into the existing single-cylinder architecture. This combination allows the engine to achieve improved power delivery efficiency through enhanced rotational motion and reduced vibration, while avoiding the full complexity of traditional multi-cylinder engine designs.
3Object-generated harmful factors
If a multiple cylinder configuration is implemented, then vibration counterbalancing is improved and power output is enhanced, but device complexity increases
Solution Approach 1:
The patent segments the vibration counterbalancing function into a separate second piston-crankshaft subsystem that operates independently from the primary power-generating cylinder. This segmentation allows the vibration control mechanism to be optimized separately while maintaining its integration with the main engine, reducing the complexity increase that would normally accompany full multi-cylinder configurations.
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
This configuration improves the engine's efficiency and performance by effectively counterbalancing vibrations and enhancing power output, leading to a more stable and powerful operation compared to single-cylinder engines.
Implementation Method 1
The second piston may include a reciprocating mass that may at least partially counterbalance reciprocating movement of the first piston
Implementation Method 2
The reciprocating mass may tune a vibrational characteristic of the internal combustion engine
Implementation Method 3
A crankshaft may be coupled with the first piston and the second piston for rotational motion associated with reciprocating movement of the first piston and the second piston
Data Source
AI summary
An internal combustion engine may include a first piston reciprocatingly disposed in a first cylinder, a combustion chamber fluidly coupled with the first cylinder, and an ignition source at least partially disposed within the combustion chamber. An intake valve may provide selective fluid communication between an intake system and the combustion chamber, and an exhaust valve may provide selective fluid communication between an exhaust system and the combustion chamber. A second piston may be reciprocatingly disposed within a second cylinder. A crankshaft may be coupled with the first piston and the second piston for rotational motion associated with reciprocating movement of the first piston and the second piston.