Internal Combustion Engine Supercharger Decompressor Energy Feedback
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Solution Overview
Problem
Existing internal combustion engines face challenges in achieving high power density, compact design, low power-to-weight ratio, and low manufacturing costs while minimizing wear and tear, especially in starting conditions and handling solid combustion residues.
Innovation Solution
Designing charging and decompressors as gear or screw compressors, coupling them for energy transfer, and incorporating a charge air cooler and sediment separator to manage energy and solid components, with fuel supplied upstream of the charging compressor to form a two-phase mixture for ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rotary lobe compressors are used in existing internal combustion engines, then the engines can achieve continuous operation, but the power-to-weight ratio increases and the manufacturing costs increase
Solution Approach 1:
The patent changes the fundamental operating parameters by using intermittent compression cycles instead of continuous operation. The charging compressor operates only during specific phases (intake stroke) rather than continuously, which reduces the required compressor size and weight while maintaining engine reliability through proper timing control
Solution Approach 2:
The compression function is segmented into discrete operational phases rather than continuous operation. The charging compressor activates only during the intake stroke and remains inactive during other strokes, dividing the operational timeline into functional segments that reduce overall system complexity and weight
2Reliability
If rotary lobe compressors are used in existing internal combustion engines, then the engines can achieve continuous operation, but the device complexity increases
Solution Approach 1:
The patent merges the charging compressor function with the existing piston motion and valve timing mechanisms. The compressor is integrated into the cylinder assembly and operates in coordination with the intake/exhaust valves, eliminating the need for separate continuous operation control systems and reducing overall device complexity
Solution Approach 2:
The charging compressor serves multiple functions: it compresses fresh air during the intake stroke, stores compressed air in the compression chamber, and supplies it during the power stroke. This multi-functionality eliminates the need for separate systems for air compression and storage, reducing device complexity
3Device complexity
If solid combustion residues are not separated, then the engine operation is simpler, but wear and deposits occur on the decompressor
Solution Approach 1:
The patent extracts solid combustion residues from the gas flow using a cyclone separator before the gas reaches the decompressor. This separation system removes harmful particles while allowing the decompressor to continue operating with clean gas, preventing wear and deposits without significantly complicating the overall engine operation
Solution Approach 2:
The cyclone separator acts as an intermediary component between the combustion chamber and decompressor. It mediates the interaction by filtering out solid residues from the hot gas flow, protecting the decompressor from direct exposure to abrasive particles while maintaining the simplicity of the overall system architecture
Data Source
Figure 1
AI summary
The supercharger compressor (2) and the decompressor (5) are constructed as a gear pump or as a screw compressor. Supercharger and decompressor are mechanically, electrically or hydraulically connected for feedback of energy to the supercharger. The supercharger has a lower power rating than the decompressor. A supercharging air cooler (13) is fitted ahead of the combustion chamber (4). Ahead of the decompressor a sedimentation separator (15) removes solids in the exhaust gases (6).