Engine Spacer Structure for Precise Coolant Port Flow Tuning
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Solution Overview
Problem
Existing engine designs face limitations in finely adjusting the coolant flow rate from a cylinder block to a cylinder head due to manufacturing constraints on the size and shape of communication ports, which affects the efficiency of coolant distribution.
Innovation Solution
Incorporating a spacer with a protruding portion that penetrates a communication port closest to a branch passage, creating clearances that allow for adjustable coolant flow rates by modifying the shape of the protruding portion without altering the communication port's size or shape, thereby optimizing coolant distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size and shape of the communication port are changed to adjust coolant flow rate, then the coolant flow rate can be adjusted, but the manufacturing flexibility is limited
Solution Approach 1:
The communication port is segmented into two independent components: the port itself (formed in the gasket) and the protruding portion (formed on the spacer). This segmentation allows the protruding portion to be independently shaped and positioned to precisely control coolant flow, while the communication port maintains standard manufacturing dimensions. The protruding portion acts as a separate flow control element that can be optimized without reworking the communication port manufacturing process.
Solution Approach 2:
The protruding portion on the spacer serves as an intermediary element between the communication port and the coolant flow. Instead of directly modifying the communication port geometry, the protruding portion mediates the flow control function by creating variable clearances with the communication port edges. This intermediary structure enables precise flow rate adjustment while keeping the original communication port manufacturing unchanged.
2Manufacturing precision
If the communication port size is reduced to increase flow rate control, then flow precision improves, but manufacturing complexity increases
Solution Approach 1:
The flow control function is segmented from the communication port structure and assigned to the protruding portion on the spacer. The communication port itself remains a simple through-hole or opening in the gasket, while the protruding portion provides the complex geometry needed for flow control. This segmentation reduces communication port complexity while achieving precise flow control through the protruding portion's design.
Solution Approach 2:
The protruding portion creates a simplified copy or representation of the flow control function without requiring complex modifications to the original communication port. By placing a protruding structure on the spacer that interacts with the communication port edges, the system achieves flow control precision without duplicating the complexity in the communication port itself.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables precise adjustment of coolant flow rates, enhancing cooling efficiency and reducing stagnation, while accommodating manufacturing limitations and potential installation errors.
Implementation Method 1
the spacer includes a protruding portion that penetrates one of the communication ports that is closest to the branch passage, and there is a clearance between the protruding portion and the one of the communication ports
Data Source
AI summary
An engine includes a cylinder block including a first jacket through which a coolant flows, a spacer disposed within the first jacket, a cylinder head including a second jacket through which the coolant flows from the first jacket; and a gasket interposed between the cylinder block and the cylinder head. The cylinder block includes a branch passage branched off from the first jacket to supply the coolant to an external device. The gasket includes communication ports that communicate the first jacket with the second jacket. The spacer includes a protruding portion that penetrates one of the communication ports that is closest to the branch passage. There is a clearance between the protruding portion and the one of the communication ports.