Brake Pump Piston Axial Channel for Compact Hydraulic Pressure
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Solution Overview
Problem
Existing pump devices for motor vehicle brake systems require significant installation space and complex assembly, and struggle to efficiently generate and control hydraulic pressure independently of brake pedal actuation.
Innovation Solution
A compact pump device design featuring a pressure piston with an axial through-channel, a non-return valve, and a return spring, integrated with an electromagnetic actuator and inlet valve, allowing for reduced installation space and simplified assembly by enabling reliable hydraulic pressure generation and direction control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional pump device design is used, then hydraulic pressure can be generated, but the installation space requirement is large and assembly is complex
Solution Approach 1:
The pressure piston is designed with an integrated axial through-channel that passes through the entire piston body, merging the function of hydraulic medium conveyance with the piston structure itself. This integration eliminates the need for separate conveyance channels in the housing, reducing the overall device volume and simplifying assembly operations.
Solution Approach 2:
The pump device is segmented into modular components including the pressure piston with integrated through-channel, the non-return valve assembly, and the electromagnetic actuator. This segmentation allows for simplified assembly where components can be independently manufactured and then assembled together, reducing overall assembly complexity while maintaining compact dimensions.
2Stress or pressure
If the pressure piston cross-sectional area is increased to improve pressure generation, then hydraulic pressure increases, but the device volume increases
Solution Approach 1:
The pressure piston features a stepped cross-sectional design where the first cross-sectional area (facing the pressure chamber) is larger than the second cross-sectional area (facing the non-return valve). This local variation in cross-sectional area allows the piston to generate sufficient hydraulic pressure in the pressure chamber while maintaining a compact overall device volume, as the larger area is only where needed for pressure generation.
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 provides a compact, easily assembled pump device that efficiently generates and controls hydraulic pressure, ensuring reliable operation and durability while minimizing installation space and external influences.
Implementation Method 1
an electromagnetic actuator which comprises an armature and an electrically energizable solenoid
Implementation Method 2
a non-return valve which separates the pressure chamber from a pressure connection and only removes the separation when the hydraulic pressure in the pressure chamber is greater than in the pressure connection
Implementation Method 3
a return spring assigned to the pressure piston
Data Source
AI summary
A pump device for a brake system of a motor vehicle has a housing, a pressure piston which delimits a pressure chamber in the housing for producing hydraulic pressure mounted in the housing in a longitudinally displaceable manner, a return spring assigned to the pressure piston, a non-return valve which separates the pressure chamber from a pressure connection and only removes the separation when the hydraulic pressure in the pressure chamber is greater than in the pressure connection, and an electromagnetic actuator which includes an armature and an electrically energizable solenoid. The armature is arranged on the pressure piston and the solenoid in and/or on the housing. The pressure piston has an axial through-channel which opens out into the pressure chamber at one end and is assigned to the non-return valve at the other end.