Segmented Opposed-Piston Engine Block for Liner Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Opposed-piston engines require complicated machining and limited access for liner installation, increasing manufacturing time and cost due to the need for precise accommodation and sealing within a one-piece engine block.
Innovation Solution
The engine block is designed with multiple segments that allow easier installation of cylinder liners by aligning bores to receive the liners, providing improved access and eliminating the need for complex machining, with intermediate support collars for enhanced liner stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a one-piece engine block is used, then structural integrity is improved, but manufacturing complexity and cost increase due to complicated machining and limited access for liner installation
Solution Approach 1:
The engine block is divided into multiple separable segments (typically three segments: two outer segments and a middle segment) that can be manufactured independently and assembled together. This segmentation allows each segment to be produced with simpler machining operations and provides easy access to the cylinder bore for liner installation, while the assembled segments form a structurally intact engine block
2Strength
If a one-piece engine block is used, then structural integrity is improved, but manufacturing time increases due to complicated machining operations
Solution Approach 1:
The engine block is divided into multiple separable segments (typically three segments: two outer segments and a middle segment) that can be manufactured independently and assembled together. This segmentation allows each segment to be produced with simpler machining operations and provides easy access to the cylinder bore for liner installation, while the assembled segments form a structurally intact engine block
3Strength
If a one-piece engine block is used, then structural integrity is improved, but access to internal components is limited
Solution Approach 1:
The engine block is divided into multiple separable segments (typically three segments: two outer segments and a middle segment) that can be manufactured independently and assembled together. This segmentation allows each segment to be produced with simpler machining operations and provides easy access to the cylinder bore for liner installation, while the assembled segments form a structurally intact engine block
Data Source
AI summary
An opposed-piston engine assembly is disclosed including a first cylinder liner containing a pair of first pistons that move toward one another in one mode of operation and away from one another in another mode of operation. The pistons are coupled to first and second crankshafts. Multiple block segments arranged in a side-by-side abutting relationship form the engine block including a first outboard segment, a first inboard segment, a second inboard segment, and a second outboard segment. Tensile members extend through the block segments tying them together as one structural unit. The first and second inboard segments abut one another at a seam and include bores that cooperate to receive the first cylinder liner. The first cylinder liner includes a liner support collar that is received in counter-bores defined by the first and second inboard segments at the seam between the first and second inboard segments.