Inertial Pump Valve for Combustion Engine Cooling
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Solution Overview
Problem
Inertial pumps used in internal combustion engines are not suitable for creating a fluid circuit, limiting their cooling efficiency, and require separate energy sources, which can fail if the working path is too small.
Innovation Solution
An internally cooled poppet valve with an inertial pump that uses a pump body and control body with higher densities than the cooling fluid to create a closed circuit, allowing for momentum-driven fluid pumping without external energy, and includes features like check valves and specific working strokes to ensure one-way fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an inertial pump is used in an internally cooled valve, then cooling efficiency is improved through active fluid circulation, but the device complexity increases due to additional pump components
Solution Approach 1:
The inertial pump components (pump body, control body, check valves) are integrated within the valve structure itself, merging the cooling pump function with the existing valve assembly. This combination allows active cooling fluid circulation without requiring completely separate pump systems, thereby improving cooling efficiency while limiting the increase in overall device complexity.
Solution Approach 2:
The inertial pump operates autonomously by utilizing the reciprocating motion of the valve stem during normal valve operation. The pump body and control body automatically respond to the valve's motion to pump cooling fluid, eliminating the need for external energy sources or separate drive mechanisms. This self-service operation improves cooling while avoiding additional complexity from external power systems.
2Force
If a pump body with higher density than cooling fluid is used, then momentum transfer for fluid pumping is improved, but the weight of moving parts increases
Solution Approach 1:
The pump body is designed with higher density material or increased mass concentration to enhance momentum transfer to the cooling fluid during valve reciprocation. This parameter change ensures effective fluid pumping action. However, the mass is optimized to be sufficient for momentum transfer while considering the overall valve weight constraints, balancing pumping effectiveness with acceptable weight increase.
3Reliability
If the inertial pump is matched to a specific working path, then pumping reliability is improved, but the adaptability decreases for different valve stroke configurations
Solution Approach 1:
The inertial pump components (pump body, control body, check valves) are designed to dynamically adapt to the reciprocating motion of the valve stem. The pump operation is synchronized with the valve's working path through the dynamic interaction of these components, ensuring reliable pumping for the specific application while maintaining the ability to function across different valve stroke configurations through its responsive 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
Enhances cooling efficiency by maintaining a closed fluid circuit and ensuring consistent fluid flow direction, improving the overall cooling capacity of internal combustion engines.
Implementation Method 1
An inertial pump is further disposed in the valve body or in the cavity, which moves the cooling fluid in the cavity during operation of the valve or pumps it through the cavity. The inertial pump is thereby operated by a movement of the poppet valve in the axial direction, wherein the pump is moved by a momentum transfer between valve body and pump.
Implementation Method 2
The inertial pump must be matched to a working path of the valve. The use in an engine which operates the valve with a too-small working path can have the result that the inertial pump completely fails.
Implementation Method 3
the inertial pump comprises at least one pump body which has a higher density than a density of the cooling fluid. It is important here that the pump body has a significantly higher density than the cooling fluid or cooling fluid since it would otherwise float or be suspended in this and would not be able to move this through its momentum.
Implementation Method 4
The inertial pump is based on the fact that a pump body that has a higher density than the fluid to be conveyed can push this in front of it and can also transport a quantity of fluid corresponding to its volume against a momentum direction.
Implementation Method 5
The control body can be operated floating in the cooling fluid or dipped in the cooling fluid. The control body has the task of controlling whether the pump body executes an upward pumping, downward pumping or an empty movement.
Data Source
AI summary
A internally cooled poppet valve (2) with inertial pump (4) includes a valve body (20) having a valve head (22) and a valve stem (24). The valve body (20) has a closed cavity (26), in which a cooling fluid (28) is disposed. The inertial pump (4) is disposed in the valve body (20), which moves the cooling fluid (28) in the cavity during operation.