Variable Displacement Engine Piston Mechanism
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Solution Overview
Problem
Conventional internal combustion engines face challenges in optimizing power delivery across varying power requirements and speed conditions, leading to inefficiencies and irregular heat patterns, and are sensitive to fuel grade changes requiring different compression ratios.
Innovation Solution
The engine employs a variable displacement system that adjusts piston stroke and compression ratio dynamically, allowing for optimal operation across different power conditions and fuel types without causing irregular heating patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the engine is designed with large combustion chamber capacity to produce required power, then power output is improved, but fuel consumption increases during low power situations
Solution Approach 1:
The patent implements dynamic displacement control by allowing pistons to be positioned at different heights within cylinders, enabling the engine to adjust its active volume continuously. This dynamic adjustment allows the engine to match power output to actual demand, reducing fuel consumption during low-power situations while maintaining required power capability when needed.
Solution Approach 2:
The patent changes the operational parameters of the engine by varying piston positions and active cylinder volumes. By controlling which portions of cylinders are active and adjusting piston heights, the engine can operate at optimal efficiency points across different power requirements, rather than running a fixed-displacement engine at part-throttle conditions.
2Loss of energy
If cylinders are blocked to reduce air and fuel volume, then fuel economy is improved, but irregular heat patterns are generated
Solution Approach 1:
Instead of statically blocking cylinders, the patent dynamically adjusts piston positions to control active volume. This dynamic approach allows for more gradual and controlled displacement reduction, distributing thermal loads more evenly across all cylinders while still achieving fuel economy benefits through reduced air-fuel mixture consumption in active portions of cylinders.
3Power
If the engine operates at high RPM to meet power demand, then power output is improved, but fuel efficiency decreases during cruising conditions
Solution Approach 1:
The patent enables the engine to dynamically adjust its displacement to match power demand, allowing it to operate at lower, more efficient RPM during cruising conditions by reducing active cylinder volume. When high power is needed, the engine can increase active volume and RPM as required, optimizing the balance between power output and fuel efficiency across different operating conditions.
Data Source
AI summary
The method of providing an internal combustion engine with one or more variable sized combustion chambers providing pistons in the cylinders forming combustion chambers, providing the pistons with piston connecting rods which are pivotably connected to the pistons on one end and to floating pins on the second end, providing crankshaft connecting rods pivotably connected to rod journals on the crankshaft and to the floating pins on a second end, and moving the position of the crankshaft relative to the cylinders such that when the position of the crankshaft relative to the cylinders is changed, the operating characteristics of the engine are changed.