ABS Pressure Modulator Spring Nesting in Rotor Bar
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Solution Overview
Problem
Conventional pressure modulators for ABS systems are prone to malfunction due to movable hydraulic line components and have a relatively large length, affecting their compactness and reliability.
Innovation Solution
A compact pressure modulator design for ABS systems where the spring element is integrated within the rotor bar, reducing the housing length and eliminating movable hydraulic line components, with a control piston and a single dynamic seal to enhance reliability, and incorporating an electronic circuit and pressure sensor for space efficiency and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the spring element is disposed outside the rotor bar, then the housing must be longer to accommodate the spring element, but this increases the overall length of the pressure modulator
Solution Approach 1:
The spring element is disposed inside the rotor bar, nesting one component within another. This allows the spring element to be accommodated within the existing rotor bar volume, eliminating the need to extend the housing length while maintaining all necessary functions.
Solution Approach 2:
The spring element and rotor bar are combined into a single integrated structure where the spring element is housed within the rotor bar. This merging of components reduces the overall number of separate parts and eliminates the need for additional housing length to accommodate the spring element.
2Adaptability or versatility
If one part of the hydraulic line is made movable relative to the housing, then the pressure modulator can accommodate movement, but this makes the pressure modulator susceptible to malfunction
Solution Approach 1:
Instead of making the hydraulic line movable to accommodate movement, the invention fixes the hydraulic line relative to the housing and allows other components (the rotor bar with the spring element) to move. This inversion of the movable element eliminates the malfunction risk associated with movable hydraulic lines while maintaining the necessary adaptability.
3Reliability
If multiple dynamic seals are used in the pressure modulator, then sealing is improved, but this increases device complexity and potential failure points
Solution Approach 1:
The invention eliminates unnecessary dynamic seals by reconfiguring the component arrangement. By disposing the spring element inside the rotor bar and fixing the hydraulic line, the design removes redundant sealing requirements, keeping only the essential dynamic seal between the rotor bar and control piston.
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 design results in a more reliable, compact, and space-efficient pressure modulator with reduced dynamic seals, improved lubrication of the rotor bar, and enhanced electromagnetic compatibility, ensuring effective operation and reduced interference from environmental factors.
Implementation Method 1
a volume accumulator that is to be opened against a spring force of a spring element
Implementation Method 2
a housing with a hydraulic inlet and a hydraulic outlet that are interconnected via a hydraulic line
Implementation Method 3
a linear drive with a rotor bar, wherein a displacement movement of the rotor bar effectuates the opening of the volume accumulator
Data Source
AI summary
A pressure modulator for an antilock braking system (ABS) has a housing with a hydraulic inlet and a hydraulic outlet, the hydraulic inlet and outlet interconnected via a hydraulic line; a volume accumulator arranged to be opened against a spring force of a spring element and which increases a volume of the hydraulic line during an activated anti-lock function. A linear drive is provided with a rotor bar, where a displacement movement of the rotor bar effectuates an opening of the volume accumulator. The spring element is supported at least indirectly on the housing and the rotor bar, where the spring element is disposed in the rotor bar.