Coolant Passage Rib Reduces Pressure Drop in Engine Pump
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Solution Overview
Problem
Existing coolant passage structures for internal combustion engines face challenges in achieving sufficient cooling efficiency due to pressure drops in coolant systems, often requiring large water pumps and coolant passages, which can be inefficient and bulky.
Innovation Solution
A coolant passage structure featuring a centrifugal water pump with a housing portion, scroll portion, first coolant passage portion, and second coolant passage portion, where a rib is strategically placed on the internal surface of the first coolant passage portion to adjust coolant flow, reducing pressure drops by preventing collisions of coolant streams and optimizing flow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large pressure drop exists in the coolant system, then sufficient cooling ability is not obtainable, but a large water pump and coolant passage are needed
Solution Approach 1:
The patent applies local quality by introducing a rib structure at a specific location within the coolant passage to modify flow characteristics. This localized modification creates turbulence that reduces pressure drop without requiring enlargement of the entire coolant passage system, thus resolving the contradiction between achieving sufficient cooling ability and avoiding excessive device complexity.
Solution Approach 2:
The patent changes the flow parameters by introducing a rib that modifies coolant flow velocity distribution and turbulence intensity. This parameter change reduces pressure drop in the coolant system, enabling sufficient cooling ability with a more compact water pump and coolant passage design.
2Device complexity
If coolant streams collide in the coolant passage, then pressure drop increases, but the passage structure becomes simpler
Solution Approach 1:
The rib acts as an intermediary element within the coolant passage that mediates between the coolant streams. By positioning the rib strategically, it prevents direct collision between coolant streams while maintaining a simple passage structure, thus reducing pressure drop without complicating the overall design.
Solution Approach 2:
The rib divides the coolant flow into separate streams that flow parallel to each other rather than colliding. This segmentation of the flow reduces energy loss from collisions while maintaining structural simplicity in the coolant passage design.
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
The solution effectively reduces pressure drops in the coolant passage system, enhancing cooling efficiency and allowing for a more compact design by directing coolant streams efficiently from the centrifugal water pump to the engine's coolant passage, thereby improving cooling performance and reducing system size.
Implementation Method 1
a centrifugal water pump (22)
Implementation Method 2
A rib (30) for adjusting the coolant flowing inside the first coolant passage portion (28) is disposed on an internal circumferential surface of the first coolant passage portion (28)
Data Source
AI summary
A coolant passage structure for an internal combustion engine includes a coolant communication member. The coolant communication member includes a centrifugal water pump, a housing portion, a scroll portion, a second coolant passage portion, a first coolant passage portion, a direction of a center line of the second coolant passage portion, and a rib. The first coolant passage portion includes a downstream region connected to an upstream region of the second coolant passage portion. A direction of a center line of the first coolant passage portion is parallel to a direction of a rotation shaft of the centrifugal water pump. The direction of the center line of the second coolant passage portion is orthogonal to the direction of the center line of the first coolant passage portion. The rib is disposed on an internal circumferential surface of the first coolant passage portion.