Segmented Combustion Cylinder for Oil-Free Lubrication and Scavenging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Internal combustion engines face challenges in efficient lubrication management, leading to oil contamination in the combustion space, restricted airflow, and mechanical complexities, which impair performance and longevity.
Innovation Solution
A self-charged four-stroke one-cycle combustion cylinder design featuring a segmented cylinder with a pre-compression space and combustion space, an occupying structure as a secondary piston, an integrated oil socket for direct lubrication, and an air intake assembly with one-way valves to optimize airflow and exhaust scavenging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cylindrical skirt is used to protect the combustion space from oil contamination, then the combustion space is protected, but oil consumption increases significantly due to oil particles being trapped and reciprocated at high velocity
Solution Approach 1:
The cylinder is divided into two distinct spaces: a lubrication space for oil injection and a combustion space for burning fuel. The occupying structure acts as a movable separator between these spaces, preventing oil from entering the combustion chamber while allowing direct lubrication of the crankshaft piston in the lubrication space.
Solution Approach 2:
The harmful function of the skirt (trapping and reciprocating oil particles) is eliminated by removing it entirely. Instead, the patent uses an occupying structure that moves with the crankshaft piston to separate the lubrication and combustion spaces, extracting the oil containment function from the combustion space protection function.
2Productivity
If exhaust channels are positioned between the occupying structure and the crank-shaft piston, then exhaust scavenging is improved, but lubrication is interfered with
Solution Approach 1:
The engine is segmented into separate lubrication and combustion spaces. Exhaust channels are positioned in the combustion space where they can efficiently scavenge exhaust gases without interfering with the lubrication oil injected into the lubrication space. The occupying structure maintains the separation between these functional zones.
Solution Approach 2:
The occupying structure serves as an intermediary element that separates the lubrication space from the combustion space. This allows exhaust channels to be positioned in the combustion space for effective scavenging while preventing interference with the lubrication system in the separate lubrication space.
3Device complexity
If straight parallel rods are used to connect the crank piston and the occupying structure, then mechanical simplicity is achieved, but conflicts arise between acting pressure and mechanical link limitations
Solution Approach 1:
The connecting rods are designed to angle dynamically with the crankshaft piston rod rather than remaining straight and parallel. This angular configuration allows the mechanical links to complement the pressure controls of the occupying structure motion, resolving conflicts between mechanical constraints and pressure dynamics during the combustion cycle.
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
Enhances lubrication efficiency, reduces wear, improves air intake, and minimizes mechanical complexities, resulting in better fuel economy, reduced emissions, and lower operational costs, making it suitable for modern automotive applications.
Implementation Method 1
air being inductively transferred to the combustion space during a retraction stroke via the use of one-way valves
Implementation Method 2
the oil socket is configured for direct lubrication from an engine oil sump to the cylinder's internal surfaces
Implementation Method 3
an occupying structure situated within the cylinder, acting as a secondary piston and configured to reciprocate in unison with the crank-shaft piston
Implementation Method 4
Self-charged four stroke one-cycle combustion cylinder for internal combustion engine
Data Source
AI summary
A self-charged four stroke one-cycle combustion cylinder for an internal combustion engine includes a cylinder defining an internal space segmented into a pre-compression space and a combustion space, wherein a bore size of said cylinder is greater than that of a crank-shaft piston housed within, an occupying structure situated within the cylinder, acting as a secondary piston and configured to reciprocate in unison with the crank-shaft piston, an oil socket with a first outer sleeve and a second inner sleeve designed to enclose the crank-shaft piston, facilitating reciprocation therein, wherein the oil socket is configured for direct lubrication from an engine oil sump to the cylinder's internal surfaces without contaminating the combustion space and configured for supporting exhaust scavenging, and, an air intake assembly capable of directing air into the pre-compression space during a power stroke, with the air being inductively transferred to the combustion space during a retraction stroke.