Opposed Piston Engine Self-Supercharging via Transfer Ports
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Solution Overview
Problem
Existing opposed piston engines require superchargers to generate pressurized air, which adds complexity and weight, limiting their lightweight and efficient operation.
Innovation Solution
A lightweight opposed piston engine design that uses two pistons moving in synchronization within a combustion chamber to self-supercharge air, allowing pressurized air to be inducted at lower temperatures through transfer ports, eliminating the need for a supercharger and enabling connection to micro-generators for power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a supercharger is used to generate pressurized air, then the air intake is improved, but the device complexity and weight increase
Solution Approach 1:
The patent removes the supercharger component from the system entirely. Instead of using a mechanical supercharger to pressurize air, the invention uses the natural pressure differential created by piston movement during the intake stroke to draw in and pressurize air through specially designed transfer ports and combustion chamber geometry.
Solution Approach 2:
The engine system pressurizes its own air intake using the kinetic energy of the moving pistons themselves. The pistons create a pressure differential that automatically draws in and pressurizes air without requiring an external supercharger system, making the system self-sufficient.
2Quantity of substance
If a supercharger is used to generate pressurized air, then the air intake is improved, but the weight increases
Solution Approach 1:
The patent removes the supercharger component from the system entirely. Instead of using a mechanical supercharger to pressurize air, the invention uses the natural pressure differential created by piston movement during the intake stroke to draw in and pressurize air through specially designed transfer ports and combustion chamber geometry.
Solution Approach 2:
The engine system pressurizes its own air intake using the kinetic energy of the moving pistons themselves. The pistons create a pressure differential that automatically draws in and pressurizes air without requiring an external supercharger system, making the system self-sufficient.
3Power
If pistons move to induct pressurized air, then the power generation is improved, but the air temperature increases
Solution Approach 1:
The patent pre-cools the air before it enters the combustion chamber by allowing it to pass through transfer ports where it can be cooled by the surrounding environment or engine components. This preliminary cooling action occurs before the air is compressed and ignited, reducing the temperature of the intake air.
Solution Approach 2:
The transfer ports act as intermediary pathways that allow air to transition from the intake manifold to the combustion chamber. During this transition, the air can be cooled by contact with cooler surfaces or through expansion, reducing its temperature before combustion occurs.
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 engine generates 0 to 8 kilowatts of power, weighs between 5 and 30 pounds, and operates efficiently without a supercharger, making it suitable for lightweight applications, with micro-generators weighing between 3 and 10 pounds.
Implementation Method 1
moving a first piston, within the combustion chamber of the lightweight engine, past a first inlet to induct a first, self-supercharged amount of pressurized air into a first crankshaft
Implementation Method 2
moving the first piston to bottom dead center to allow first pressurized air through a first transfer port, wherein the first pressurized air is at a lower temperature than first exhaust gases
Data Source
AI summary
Pressurized air may be generated within a lightweight opposed piston engine without the need to make use of a supercharger. The lightweight engine may be combined with one or more lightweight micro-generators.