Fluid Pump Piston Closing Element Air Reduction
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Solution Overview
Problem
In vehicle brake systems, air dissolved in hydraulic fluid reduces the discharge capacity of fluid pump devices, especially at low temperatures, leading to potential system failure or reduced performance due to increased viscosity and air entrainment, and existing methods to minimize air, such as vacuum filling, are complex and limited by construction space constraints.
Innovation Solution
A fluid pump device with a piston and integrated closing element, where the closing element is moved by fluid pressure, eliminating the need for additional components and allowing the piston to reach the boundary of the pressure space without occupying construction space, thus reducing detrimental volume and allowing reliable operation at low temperatures without vacuum filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the brake system is filled with hydraulic fluid under vacuum to minimize air presence, then the air quantity in the system is reduced, but the process becomes complicated and requires effective sealing and manufacturing facility equipment
Solution Approach 1:
The invention extracts the harmful air from the system by minimizing the detrimental volume where air can be trapped. The closing element is designed to close the through-line before the piston reaches its end position, effectively removing the detrimental space where air would accumulate, thereby eliminating the need for complex vacuum filling processes
Solution Approach 2:
The system serves itself by using the fluid pressure to automatically move the closing element into the closed position during normal operation. The fluid pressure generated during piston movement actuates the closing element without requiring external vacuum equipment or complex sealing procedures
2Quantity of substance
If the volume of detrimental space is reduced to minimize air quantity, then the air expelled during expansion is reduced, but construction space is required for mounting components such as the closing element
Solution Approach 1:
The closing element is nested within the piston structure, specifically integrated into the through-line of the piston. This nesting allows the closing element to be accommodated within the existing piston volume without requiring additional construction space, thereby minimizing the detrimental volume while maintaining component functionality
Solution Approach 2:
The closing element is merged with the piston structure, where the closing element is positioned within the through-line of the piston. This merging eliminates the need for separate mounting spaces for the closing element, reducing the overall detrimental volume while maintaining the necessary construction space for the closing mechanism
3Reliability
If additional components are added to actuate the closing element, then the closing element can be reliably actuated, but the construction space occupied increases the detrimental volume
Solution Approach 1:
The closing element is actuated by the fluid pressure itself during normal pump operation. As the piston moves and fluid pressure builds, the pressure automatically moves the closing element into the closed position, eliminating the need for additional actuating components and reducing the detrimental volume
Solution Approach 2:
The invention extracts the actuation function from separate components and integrates it into the fluid pressure system itself. The fluid pressure that naturally builds during piston movement is used to actuate the closing element, removing the need for additional actuating mechanisms and reducing construction space
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 the detrimental volume, enhancing the reliability of the brake system's operation at low temperatures by minimizing air presence and eliminating the need for additional components, thereby ensuring consistent performance and reducing the risk of system failure.
Implementation Method 1
a force is generated that is transmittable from the fluid to the closing element and that moves the closing element in the direction of its closed position
Implementation Method 2
the hydraulic fluid is compressed to a pressure of up to 200 bar. To build up this pressure, the hydraulic fluid to be displaced is first delivered to a pressure space. As a result of piston movement, the incompressible hydraulic fluid is brought to the desired pressure.
Data Source
AI summary
A pump device and method minimizes the quantity of air in a vehicle brake system by reducing the volume of detrimental space. The device includes a piston movable between first and second end points, a line system that conducts fluid through the device, and a closing element, movable between an open position releasing the flow of the fluid and a closed position interrupting the fluid flow, that selectively releases the flow of the fluid through the device. The line system includes a through-line formed in the piston for conducting the fluid through the piston. By virtue of a section of the through-line that receives the closing element in the piston, a force is generated that is transmittable from the fluid to the closing element that moves the closing element in the direction of its closed position when the piston is moving in the direction of the first end point.