Rotary Engine Cooling and Pressurization via Compressed Air Switching
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Solution Overview
Problem
Rotary engines face inefficiencies in internal cooling and pressurization, particularly at high altitudes where air is cool and atmospheric pressure is reduced, leading to inadequate heat dissipation and performance issues.
Innovation Solution
A device with a mechanical charger, valves, and tubes that allows for automatic or remote control switching between ground surface cooling, high altitude pressurization, and requirement adjusting modes, ensuring optimal air flow for internal cooling and pressurization by regulating air intake and core cooling air to the rotary engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air cooling is used for internal cooling of rotary engine, then the structure is simple, but the cooling efficiency is insufficient at high power output
Solution Approach 1:
The patent merges the air cooling function with the power output function by using the same air intake system. The compressor compresses air that is then distributed to both the combustion chamber and the cooling passages, combining two functions into one system to improve internal cooling efficiency without significantly increasing structural complexity
Solution Approach 2:
The patent uses pneumatic principles by employing compressed air from the compressor to flow through internal cooling passages. The compressed air serves as the cooling medium, utilizing pressure-driven flow to deliver cooling air to critical internal components such as the rotor and bearing areas
2Temperature
If water cooling or oil cooling is used for internal cooling, then the cooling efficiency improves, but the system complexity and cost increase
Solution Approach 1:
The system uses the engine's own compressed air, which is already being used for power output, to provide internal cooling. This self-service approach eliminates the need for separate water or oil cooling systems, reducing overall system complexity while maintaining effective internal cooling through the reuse of existing compressed air
3Temperature
If ram pressure is increased to raise cooling air flow at high RPM, then cooling efficiency improves at high speed, but cooling flow is insufficient at low RPM
Solution Approach 1:
The patent employs a variable geometry air passage that dynamically adjusts its opening area based on operating conditions. The passage includes an adjustable component that can change its configuration to optimize air flow characteristics, allowing sufficient cooling air delivery across a wide range of RPM from low to high speed operation
Solution Approach 2:
The system performs preliminary compression of air through the compressor before distribution to cooling passages. This pre-compression ensures that air is pressurized in advance, enabling effective cooling air flow even at low RPM conditions where ram pressure would normally be insufficient, while still allowing high-speed operation to benefit from the compressed air supply
4Device complexity
If air cooling is used for internal cooling, then the system is simple, but the cooling flow is reduced due to pulsating flow and passage blockage
Solution Approach 1:
The patent uses compressed air from the compressor to overcome the pulsating flow and passage blockage issues inherent in simple air cooling systems. The compressed air provides a more stable and sufficient cooling air flow that is not adversely affected by the pulsating characteristics of the rotary engine's air intake and exhaust cycles
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 device enhances rotary engine performance by providing effective internal cooling and pressurization across varying environments, optimizing power output and maintaining normal combustion and cooling even at high altitudes.
Implementation Method 1
a mechanical charger (10), a charger outlet tube (80)... The mechanical charger is mounted in a ventilated place. The charger outlet tube is used to dispense air
Implementation Method 2
a first valve (30), a second valve (40), and a third valve (50)... The first valve (30) is disposed on the engine air intake tube (70), and is used to control the intake air quantity
Implementation Method 3
the core cooling intake tube (60) is connected to another one side of the charger outlet tube (80), and is used to dispense air... providing effective internal cooling
Implementation Method 4
the engine air intake tube (70) is connected to another one side of the charger outlet tube (80)... maintaining normal combustion
Data Source
AI summary
A device for internal cooling and pressurization of rotary engine, comprising: a mechanical charger, a charger outlet tube, a core cooling intake tube, an engine air intake tube, a first valve, a second valve, and a third valve. The mechanical charger is mounted in a ventilated place. The charger outlet tube is used to dispense air, and the charger outlet tube has two sides, with one side coupled to the mechanical charger. The core cooling intake tube is connected to another side of the charger outlet tube, and is used to dispense air. The engine air intake tube is connected to another side of the charger outlet tube. The device for cooling and pressurization of rotary engine is capable of achieving improved cooling and performance of rotary engine, through switching a plurality of valves, in automatic control manner and/or in remote control manner.