Cylinder Crankcase Cooling Core Alignment
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Solution Overview
Problem
Existing methods for producing cylinder crankcases with close cylinder arrangements face challenges in ensuring optimal alignment and efficient cooling of web areas between cylinders, leading to potential thermal overstressing and errors in cooling water supply.
Innovation Solution
A device with a web core placed in the casting mold, aligned with the water jacket core, allows for a connection between cooling channels, enabling separate or combined cooling circuits and eliminating position tolerance issues, with the web core being fastened in a form-fitting manner to ensure precise alignment and efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If additional bores are introduced into the web area to connect opposing cooling channels, then cooling efficiency is improved, but manufacturing complexity and post-processing requirements increase
Solution Approach 1:
The cooling system is segmented into water jacket cores forming longitudinal cooling channels and separate web cores forming transverse cooling channels. These segmented core components are independently manufactured and then assembled within the mold, allowing each to be optimized separately while simplifying the overall manufacturing process by avoiding complex post-processing operations.
2Temperature
If cores are used to form web cooling channels, then cooling coverage is improved, but alignment precision and positional accuracy deteriorate
Solution Approach 1:
The web core is merged with the water jacket core through form-fitting connections and positive locking mechanisms during mold assembly. This merging ensures precise alignment between the transverse web cooling channels and longitudinal water jacket channels, eliminating accumulation of positional tolerances while maintaining adequate clearance for cooling water flow.
Solution Approach 2:
The water jacket core acts as an intermediary element that receives and positions the web core through form-fitting connections. This intermediary relationship ensures accurate positioning of the web cooling channels relative to the cylinder banks while allowing independent manufacturing of each core component.
3Adaptability or versatility
If separate cooling circuits are used for web cooling and cylinder cooling, then cooling flexibility is improved, but system complexity and connection requirements increase
Solution Approach 1:
The cooling system is designed with universal inlet and outlet connections that can serve both the web cooling circuit and the cylinder cooling circuit. This multi-functionality allows the same connection points to supply cooling water to both separate circuits, reducing the number of additional connections required while maintaining the flexibility of separate cooling paths.
Data Source
Figure 1~2
AI summary
Apparatus comprises a casting mold (12) having a multiple of molded parts (14, 15, 16), at least one water jacket core (22) arranged on two longitudinal sides (24) of at least one mold part (20) forming a row of cylinders, and at least one web core, which is inserted into the casting mold and aligned with the casting mold, where the web core is arranged between the individual cylinders of the mold part forming the row of cylinders.