Double-Acting Piston Engine Valveless Lubrication
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Solution Overview
Problem
Existing internal combustion engines with double-acting pistons face inefficiencies due to oil transfer into combustion products and require complex valve systems, which complicates their design and increases weight, making them less suitable for lightweight applications like aircraft and powerboats.
Innovation Solution
A double-acting piston engine design that eliminates valves by using a linear slide bearing with a sealing element and internal oil channels, allowing lubrication without transferring oil to combustion products, and operates with a simple construction that uses compressed air scavenging and water injection for efficient fuel combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a double-acting piston engine uses traditional oil circulation system with channels inside the piston, then lubrication is provided, but oil is transferred into combustion products causing pollution and inefficiency
Solution Approach 1:
The engine is divided into two separate compartments: the crankcase for lubrication and the combustion chamber for combustion. The partition with the linear slide bearing creates a physical separation that prevents oil from the crankcase from entering the combustion chamber, eliminating contamination while maintaining lubrication functionality.
Solution Approach 2:
The linear slide bearing acts as an intermediary element between the piston rod and the partition. It provides the necessary lubrication interface while the sealing element integrated into the bearing prevents oil from passing through to the combustion chamber, serving as a mediator that enables motion while blocking contamination.
2Reliability
If a double-acting piston engine uses complex valve systems for fuel and exhaust control, then combustion is managed, but device complexity and weight increase
Solution Approach 1:
The traditional valve system is completely removed from the engine design. Instead of using valves for fuel injection and exhaust control, the invention uses direct injection methods and the natural flow dynamics created by the double-acting piston motion to manage combustion, extracting the complex valve mechanism while maintaining combustion control functionality.
Solution Approach 2:
The engine uses its own operational dynamics to manage combustion. The reciprocating motion of the double-acting piston creates pressure differentials that automatically control fuel injection timing and exhaust flow without requiring external valve actuation mechanisms, making the system self-regulating.
3Reliability
If a double-acting piston engine uses traditional valve systems, then combustion is controlled, but weight increases making it unsuitable for lightweight applications
Solution Approach 1:
The heavy valve train components (valves, springs, actuators, camshafts) are completely removed from the engine design. The combustion control function is achieved through simpler, lighter mechanisms such as direct injection and natural flow control, dramatically reducing the engine's overall weight while maintaining functional reliability.
4Stability of the object's composition
If the cylinder combustion chambers are connected to the crankcase, then a complete system is formed, but oil transfers to combustion products and resonant exhaust system is needed
Solution Approach 1:
The engine is segmented into distinct functional zones separated by a partition: the crankcase housing containing the lubrication system and the combustion chambers above. This spatial segmentation maintains system integration and stability while preventing harmful oil transfer between compartments through the sealed linear slide bearing interface.
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 design effectively disconnects the cylinder combustion chambers from the crankcase, reducing the need for a resonant exhaust system and allowing the engine to maintain a positive power-to-weight ratio, making it suitable for lightweight applications and environmentally friendly.
Implementation Method 1
a linear slide bearing that is resistant to high temperatures is embedded in the middle of the partition and is equipped from below with a sealing element
Implementation Method 2
Above the sealing element on the remaining part of the slide bearing, between its wall and the surface of the piston rod shaft, the lubricating passage is formed
Implementation Method 3
The piston rod shaft has an internal oil channel, which transfers lubricating oil from the crankcase space to the cylinder space with the use of the intake opening in the lower part of the piston rod shaft as well as the outlet opening located in the pit of the piston
Implementation Method 4
Each water injector is connected to the joint water heating element, which is coupled with an exhaust manifold, via a metering device assigned to it, while the water heating element is powered by water derived from a water container
Implementation Method 5
A double-acting piston engine design that eliminates valves by using a linear slide bearing with a sealing element and internal oil channels, allowing lubrication without transferring oil to combustion products, and operates with a simple construction that uses compressed air scavenging and water injection for efficient fuel combustion
Data Source
AI summary
An internal combustion engine for use in land, aerial and water vehicles and various kinds of machinery. A first version of the engine has a cylinder with the inlet channel of compressed air and the outlet exhaust channel situated in the middle of it. In the cylinder head as well as in the partition there are the fuel injector, the water injector and the ignition element. In the middle of the partition the slide bearing is embedded, through which the tappet rod goes. The upper end of this rod is attached to the bilateral piston, whereas its lower end is connected to the connecting rod. The water injectors are powered from the water container through the heating element and the metering device. A second version the engine has a plurality of cylinders in a radial orientation.