Integrated Cylinder Head Water Pump for Compact Engine Packaging
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Solution Overview
Problem
Existing engine designs with external water pumps result in increased engine length, width, and height, particularly affecting tractor applications where compactness is crucial.
Innovation Solution
Integrating the water pump housing, including the impeller, drive shaft, and housing cover, directly into the cylinder head, eliminating the need for external brackets and reducing the engine's overall dimensions by minimizing the space required for the water pump and its associated components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the water pump is arranged externally on the crankcase or cylinder head, then the water pump can be easily assembled and maintained, but the engine's longitudinal dimension increases
Solution Approach 1:
The water pump housing is integrated directly into the cylinder head as a single casting unit, merging two previously separate components (cylinder head and water pump housing) into one unified structure. This eliminates the need for external mounting brackets and reduces the engine's longitudinal dimension while maintaining the water pump's functional integrity
Solution Approach 2:
The cylinder head is designed to serve multiple functions: it acts as both the combustion chamber housing and the water pump housing. The integrated structure provides both combustion containment and coolant circulation functions within a single component, reducing the need for separate mounting structures
2Volume of moving object
If the water pump is integrated into the cylinder head, then the engine becomes more compact, but the manufacturing complexity increases
Solution Approach 1:
The water pump housing is cast integrally with the cylinder head as a single piece, combining the cooling system housing with the combustion chamber housing. This integration reduces the overall engine volume by eliminating separate water pump housings and mounting brackets, while the casting process manages the manufacturing complexity
3Device complexity
If the water pump is integrated into the cylinder head, then fewer sealing surfaces are required, but the inlet channel space requirements increase
Solution Approach 1:
The water pump inlet channels are integrated directly into the cylinder head casting, merging the coolant flow paths with the cylinder head structure. This integration eliminates multiple external sealing surfaces and connections, reducing sealing requirements while the internal casting geometry accommodates the necessary inlet channel space
Data Source
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AI summary
The invention relates to an internal combustion engine, which comprises at least one cylinder head with a water pump that is integrally cast in the cylinder head housing.