Triangular Rotor Heat Engine with Processor-Controlled Valves

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Solution Overview

Problem

Existing rotary heat engines face inefficiencies due to blow-by issues, unequal pressure equalization, and reduced expansion chamber volume, which affect the elongated driving force and overall mechanical advantage.

Innovation Solution

A rotary heat engine design featuring a triangular rotor with two inlets and two exhaust ports, controlled by valves to prevent blow-by, and fixed gates that reduce expansion chamber volume and enhance mechanical advantage, allowing for equal pressure equalization and increased driving force through processor-controlled valve operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a rotary heat engine uses a triangular rotor with expansion chambers, then power cycles are generated, but blow-by issues occur causing pressure loss and reduced efficiency

Engineering Contradiction:
Improvepower cycles per revolutionVSAvoidpressure loss from blow-by
Core Design Contradiction:
ProductivityVSLoss of energy

Solution Approach 1:

The housing is segmented into multiple expansion chambers (three chambers formed by the triangular rotor), each capable of independent power cycles. This segmentation allows continuous power generation while isolating pressure zones to prevent blow-by between chambers, resolving the contradiction between maintaining high productivity and preventing energy loss.

Inventive Principle:
Principle #1Segmentation

2Use of energy by moving object

If expansion chamber volume is increased to maximize power output, then more energy is available for work, but mechanical advantage and pressure equalization are reduced

Engineering Contradiction:
Improveenergy available for workVSAvoidmechanical advantage
Core Design Contradiction:
Use of energy by moving objectVSForce

Solution Approach 1:

The expansion chambers are designed with non-uniform volume characteristics - each chamber provides sufficient volume for energy extraction while the overall configuration maintains pressure equalization capabilities. The triangular rotor geometry creates chambers with optimized local properties that balance energy availability and mechanical advantage, resolving the contradiction between maximizing energy use and maintaining force.

Inventive Principle:
Principle #3Local quality

3Reliability

If valves are added to control pressure and prevent blow-by, then efficiency is improved, but device complexity increases

Engineering Contradiction:
Improvepressure control and blow-by preventionVSAvoidvalve control system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system uses processor-controlled valves that automatically regulate pressure and prevent blow-by based on real-time chamber conditions. The control system monitors pressure differentials and actuates valves only when necessary, allowing the engine to self-regulate its pressure management. This reduces the need for complex mechanical pressure control mechanisms while maintaining reliability, resolving the contradiction between reliability and device complexity.

Inventive Principle:
Principle #25Self-service

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 achieves improved efficiency with six power cycles per revolution, minimized blow-by, and increased mechanical advantage, maximizing energy utilization and elongated driving force by ensuring pressure equality during the expansion phase.

Implementation Method 1

The expansion of the gas can be utilized to perform work

Methodology Applied
Scientific EffectGas expansion: Pressure Gradient

Implementation Method 2

The heat source can heat the working medium causing selected amounts of liquid to undergo a phase change to gas

Methodology Applied
Scientific EffectPhase change: Phase Change

Implementation Method 3

The heat exchanger can condense the working medium

Methodology Applied
Scientific EffectCondensation: Condensation

Data Source

PatentUS8978618B2Heat engine
Publication Date: 2015.03.17 DAVIS BRIAN
  • US8978618B2 patent drawing
  • US8978618B2 patent drawing
  • US8978618B2 patent drawing

AI summary

The present invention relates to a heat engine having a housing. A generally triangular shaped rotor can drive an offset crank as it eccentrically rotates within the housing. Two inlets with valves and two exhausts are provided. The volume between each face of the rotor and the housing defines three expansion chambers. Six power cycles are provided (one by each expansion chamber times two inlets) per revolution of the rotor. Each valve controls the length of time that high pressure gas is allowed to enter each expansion chamber. The valves are controlled by a processor and close when enough pressure is supplied so that the pressures inside and outside the expansion chamber are equal when the chamber is fully expanded just prior to exhaust. Gates can provide a mechanical advantage to the rotor by reducing the amount of pressure applied to the back side of the fulcrum.