Opposed Piston Engine Variable Compression Ratio Mechanism
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Solution Overview
Problem
Opposed piston engines lack an effective mechanism for adjusting the compression ratio, which is crucial for optimizing fuel efficiency under varying engine loads, as existing systems do not dynamically adapt to changing operational conditions.
Innovation Solution
The engine incorporates a mechanism to adjust the compression ratio by varying the spacing between crankshafts, utilizing a system of interconnected crankcases, actuators, and sensors to dynamically adjust the compression ratio based on engine demands, allowing for real-time optimization of fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the compression ratio is fixed in opposed piston engines, then the engine structure is simple, but the fuel efficiency cannot be optimized under varying engine loads
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed compression ratio into a variable one. The first and second crankcases are designed to move relative to each other along the crankshaft axis, allowing the compression ratio to be dynamically adjusted based on engine operating conditions. This is achieved through actuators that can change the spacing between crankcases, enabling the engine to adapt to varying loads and optimize fuel efficiency.
Solution Approach 2:
The patent segments the crankcase into two separate movable crankcases (first and second crankcases) that can independently position themselves along the crankshaft axis. This segmentation allows each crankcase to be controlled separately, providing fine-grained adjustment capability for the compression ratio. The interconnected rod mechanism divides the control function between multiple components, enabling precise compression ratio management.
2Adaptability or versatility
If the compression ratio is increased during high loads, then fuel efficiency improves, but the engine cannot respond dynamically to changing operational conditions
Solution Approach 1:
The patent implements feedback control through sensors that continuously monitor engine operating conditions (such as load, speed, and temperature) and provide this information to the control system. The actuators adjust the compression ratio based on this feedback, automatically optimizing performance for current conditions. This closed-loop control system enables real-time adaptation without requiring manual intervention, resolving the contradiction between adaptability and ease of operation.
3Use of energy by moving object
If a mechanism for compression ratio adjustment is added, then fuel efficiency can be optimized, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent designs the movable crankcase system to serve multiple functions: it adjusts the compression ratio, maintains structural support for the pistons and crankshaft, and provides mounting surfaces for other engine components. The actuators are integrated into the existing engine architecture, allowing them to fulfill both compression ratio control and structural support roles. This multi-functionality reduces the need for additional dedicated components, thereby easing manufacturing while achieving fuel efficiency optimization.
Data Source
AI summary
An inventive opposed piston engine is provided. The inventive engine includes an inventive mechanism that enables adjustment of a compression ratio of the engine.