Cylinder Block Insertion Members for Coolant Flow Control
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Solution Overview
Problem
Existing engine cylinder blocks face inadequate cooling, leading to temperature deviations between upper and lower portions, resulting in thermal deformation, reduced engine efficiency, and fuel economy issues due to uneven coolant distribution.
Innovation Solution
The implementation of insertion members within the water jacket of the cylinder block, featuring flow restricting and thermal insulating components, which control coolant flow to separately cool upper and lower portions, minimizing temperature deviations and enhancing thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant circulates in the water jacket from lower to upper portion, then lower portion is excessively cooled, but upper portion becomes overheated
Solution Approach 1:
The water jacket is segmented into upper and lower portions by inserting flow restricting members, allowing independent coolant flow control for each section. This segmentation enables the lower portion to be cooled adequately while preventing excessive cooling that would occur in a single continuous flow path.
Solution Approach 2:
Different flow restricting members with specific hole patterns and restrictions are applied to different locations (upper and lower water jackets) to create locally optimized cooling conditions. The lower water jacket has flow restricting members that allow controlled flow, while the upper water jacket has members that prevent excessive flow, achieving local temperature control.
2Reliability
If flow restricting members are inserted into water jacket, then upper and lower portions are separately cooled, but device complexity increases
Solution Approach 1:
Flow restricting members with porous or hole-patterned structures are used instead of solid barriers. These porous members allow controlled coolant flow through multiple small openings, achieving flow distribution control while maintaining structural simplicity and avoiding complex valve mechanisms.
Solution Approach 2:
Flow restricting members act as intermediary components inserted between the coolant source and the water jacket portions. These intermediaries simplify the overall system by providing passive flow control without requiring active control systems, sensors, or complex valve mechanisms.
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 effectively prevents overheating of the upper cylinder block portion, improves thermal insulation, and reduces friction, thereby enhancing engine efficiency and fuel economy by maintaining optimal coolant flow and temperature uniformity.
Implementation Method 1
the insertion members restrict a flow of the coolant at a lower side of the water jacket and generate a flow of the coolant at an upper side of the water jacket
Implementation Method 2
thermal insulating members which are disposed between the plurality of cylinders and the frame members and attached to the flow restricting portions
Data Source
AI summary
A cylinder block includes: a plurality of cylinders; a water jacket through which a coolant flows along an outer periphery of the plurality of cylinders; and insertion members which are inserted into the water jacket formed at both sides of the plurality of cylinders in order to separately cool upper and lower portions of the plurality of cylinders, in which the insertion members restrict a flow of the coolant at a lower side of the water jacket and generate a flow of the coolant at an upper side of the water jacket.