One-Stroke Engine Dedicated Chambers and Piston Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional internal combustion engines, particularly two-stroke engines, suffer from inefficiencies in fuel combustion and scavenging, leading to reduced fuel efficiency and increased emissions, while four-stroke engines require multiple power strokes and dedicated chambers, increasing complexity and parts count.
Innovation Solution
A one-stroke internal combustion engine design with dedicated intake, compression, ignition/combustion, and exhaust chambers, utilizing a coordinated cycle with either straight/linear or rotary configuration, featuring two double-headed pistons joined by a central shaft or external rods to perform all necessary functions in a single 180° power stroke, reducing the number of parts and improving fuel efficiency and emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a two-stroke engine uses shared chambers for intake and exhaust, then the device complexity is reduced, but fuel efficiency deteriorates and emissions increase due to inefficient scavenging
Solution Approach 1:
The engine employs separate dedicated chambers for intake, compression, ignition/combustion, and exhaust functions. This segmentation allows each chamber to be optimized for its specific function, preventing the scavenging inefficiencies that occur in shared chamber designs. The dedicated exhaust chamber enables complete separation of exhaust flow from the combustion chamber, eliminating recirculation of unburned fuel and improving fuel efficiency.
Solution Approach 2:
The piston is designed with multi-functionality, serving as both the combustion chamber seal and the valve mechanism actuator. The piston's upward and downward movements simultaneously control both intake and exhaust valves, allowing a single component to perform multiple functions that would traditionally require separate mechanisms, thus reducing overall device complexity while maintaining dedicated chamber architecture.
2Loss of energy
If a four-stroke engine uses dedicated chambers for each stroke, then fuel efficiency improves, but device complexity and parts count increase
Solution Approach 1:
The patent merges the intake and exhaust valve control functions into a single piston mechanism. The piston's upward and downward movements simultaneously actuate both valves through integrated valve mechanisms, eliminating the need for separate camshafts and timing mechanisms that would traditionally be required in four-stroke engines. This merging reduces parts count while maintaining dedicated chamber functionality.
Solution Approach 2:
The engine employs dynamic piston movement where the piston's position and motion dynamically control the opening and closing of both intake and exhaust valves. The piston's upward stroke opens the intake valve while the downward stroke opens the exhaust valve, creating a dynamic valve control system that eliminates static valve mechanisms and reduces overall complexity.
3Reliability
If a conventional engine uses multiple power strokes per cycle, then completeness of combustion cycle is improved, but productivity and power density are reduced
Solution Approach 1:
The engine employs periodic action by repeating the complete four-stroke cycle (intake, compression, ignition/combustion, exhaust) in a continuous sequence. The coordinated movement of pistons ensures that each cycle is completed efficiently, with the periodic repetition of the full cycle maintaining high power density while ensuring complete combustion through dedicated chambers for each stroke.
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 one-stroke engine achieves high fuel efficiency and low emissions with fewer parts, enabling efficient power generation in a simplified cycle, suitable for various applications from vehicles to ships, by condensing the engine cycle into a single power stroke, thus enhancing fuel economy and reducing emissions compared to conventional engines.
Implementation Method 1
a spark plug 1 that is ignited during an ignition stroke
Implementation Method 2
the spark plug 1 is ignited when the fuel/air mixture is compressed so as to cause the piston 12 to move downward from the internal combustion of the ignited mixture
Implementation Method 3
the chamber 9 is expanded but is beginning compression of the fuel in chamber 9 as the crankshaft 14 turns counterclockwise
Data Source
AI summary
One-stroke internal combustion engines may comprise reciprocating pistons which are either straight or rotary. Three principles are required to make one-stroke engines work: create four dedicated chambers, assign the chambers with coordinated functions, and make pistons move in unison. The functions will be assigned only to a single stroke but an Otto cycle produces a repeating four stroke cycle. Since four functions are performed simultaneously during one stroke, every stroke becomes a power stroke. In reality, 1-stroke engines are physically rearranged 4-stroke engines. Both straight and rotary 1-stroke engines can be modified to comprise opposed piston opposed cylinder (OPOC) engines. The reciprocating piston output of 1-stroke pistons may be converted to continuously rotating output by using crankshafts with split bushings or newly developed Crankgears with conventional bearings. A 1-stroke engine may require only one crankshaft and thus may reduce the number of parts and increase the specific power ratio.