Piston Pump Movable Annular Disk Throttle for Brake Systems
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Solution Overview
Problem
Existing piston pumps in vehicle brake systems face challenges with increased internal pressure and noise due to the design of throttling mechanisms, which can lead to higher drive power requirements and component stress, especially at low temperatures.
Innovation Solution
The piston pump incorporates a movable annular disk with a variable throttle cross section, positioned externally to minimize installation space and reduce internal pressure, with a prestressing device like a spring to dynamically adjust the throttle, allowing for optimized space utilization and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional throttling means are integrated into the piston pump structure, then the pump can control fluid flow, but the installation space increases and internal pressure rises
Solution Approach 1:
The throttle means are extracted from the internal structure of the piston pump and positioned externally. The annular disk is guided on the outer circumference of the cylinder element, separating the throttling function from the pumping function. This extraction reduces the installation space within the pump housing while also lowering internal pressure by allowing more efficient fluid flow control outside the pressure chamber.
Solution Approach 2:
The annular disk acts as an intermediary component between the fluid flow and the pump structure. It provides a controllable throttle cross-section through its axial position, mediated by the guide surfaces on the cylinder element and the biasing device. This intermediary mechanism enables precise flow control without requiring complex internal valve arrangements, thereby reducing both space and pressure requirements.
2Adaptability or versatility
If fixed throttle cross section is used, then manufacturing is simpler, but adaptability to different operating conditions is reduced
Solution Approach 1:
The throttle cross-section is made dynamic through the axially movable annular disk. The disk can shift position along its guide path, changing the annular gap between the disk and the cylinder element. This dynamic adjustment capability allows the pump to adapt to varying operating conditions such as different fluid viscosities and temperature conditions, while the biasing device provides automatic compensation without requiring complex control systems.
Solution Approach 2:
The throttle characteristic is changed by varying the axial position of the annular disk, which directly alters the throttle cross-sectional area. This parameter change enables the system to optimize fluid flow under different operating conditions. The biasing device automatically adjusts the disk position based on operating parameters such as fluid viscosity and temperature, providing adaptive control without complex mechanisms.
3Object-affected harmful factors
If throttling means are placed inside the pump, then fluid control is direct, but noise increases due to high internal pressure
Solution Approach 1:
The throttling function is extracted from the high-pressure internal environment of the pump and relocated to an external position. The annular disk is guided on the outer circumference of the cylinder element, allowing fluid throttling to occur outside the pressure chamber. This extraction significantly reduces noise by removing the throttling process from the high-pressure zone, while the direct fluid control path is maintained through the short external connection.
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 configuration reduces the internal pressure of the piston pump, especially at low temperatures, thereby decreasing drive power and load on components, enhancing noise reduction and cost-effectiveness.
Implementation Method 1
means for throttling the fluid flow (18) are provided in the fluid flow (18) after the outlet valve (15). The throttling means (10) comprise a movable ring disk (14) guided on the cylinder element (5), the axial path of which sets a variable first throttle cross section
Implementation Method 2
a pretensioning device (12) presses the annular disk (14) for dynamic throttling of the fluid flow (18) guided through the at least one outflow opening (16.6) between the cover (16) and the cylinder element (5) against a throttle point (16.4) arranged on the cover (16)
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a piston pump for delivering fluids, which piston pump comprises a piston, a cylinder element (5) and a pressure chamber (5.2) which is arranged between an inlet valve and an outlet valve and is closed by a cover (16), wherein means (10) for throttling the fluid flow (18) are provided in the fluid flow (18) downstream of the outlet valve, and to a vehicle brake system having a piston pump of this type. According to the invention, the throttle means (10) comprise a movable annular disc (14) which is guided on the cylinder element (5) and the internal diameter of which is adapted to the external diameter of the cylinder element (5), wherein the axial travel of the annular disc (14) sets a variable first throttle cross section.