Piston Sealing Collar for Vehicle Brake Pressure Control
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Solution Overview
Problem
Conventional piston-cylinder devices for vehicle braking systems require additional springs for pressure chamber volume control, increasing manufacturing costs and complexity.
Innovation Solution
A multifunctional sealing collar that seals the pressure chamber volume and opposes volume enlargement with a counterforce, eliminating the need for additional springs by being both a sealing element and a spring-like component, allowing for adjustable compression characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional springs are used for pressure chamber volume control, then the braking system achieves proper pressure-volume characteristics, but manufacturing costs and device complexity increase
Solution Approach 1:
The sealing collar is designed to perform dual functions: sealing the pressure chamber and providing spring-like counterforce against volume enlargement. By merging the sealing function and the spring function into a single component, the patent eliminates the need for separate springs, thereby reducing device complexity and manufacturing costs while maintaining proper pressure-volume characteristics
Solution Approach 2:
The sealing collar is transformed into a multifunctional element that simultaneously acts as a sealing component and a spring element. The collar's elastic deformation capability allows it to oppose pressure chamber volume enlargement with a counterforce, making it unnecessary to add dedicated spring components for volume control
2Force
If additional springs are installed for volume control, then pressure chamber behavior is controlled, but manufacturing costs increase
Solution Approach 1:
The sealing collar integrates the sealing function and the force-providing spring function into one component. This merging eliminates the need to manufacture and assemble separate spring elements, directly reducing manufacturing costs while maintaining the necessary counterforce against pressure chamber volume enlargement
Solution Approach 2:
The sealing collar serves as both a seal and a spring element, providing elastic counterforce without requiring additional components. This multifunctionality reduces the bill of materials and assembly steps, thereby lowering manufacturing costs
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
Reduces manufacturing costs and complexity by integrating the sealing collar as both a seal and a spring element, enabling adjustable compression characteristics and efficient brake fluid volume management.
Implementation Method 1
the sealing collar may also be used as a 'spring element' which opposes an enlargement of the pressure chamber volume with a counterforce
Data Source
AI summary
A (collar-equipped) piston and a piston-equipped assembly for a hydraulic unit or a piston-cylinder device of a vehicle braking system, includes a contact surface for a sealing collar, which has a shape curving away from the sealing collar, formed on the piston, so that the sealing collar is pressable, at least partially, into a displacement volume, which is spanned by the contact surface of the piston, with a pressure which is present on a side of the sealing collar directed away from the piston. Also described is a hydraulic unit and a piston-cylinder device for a vehicle braking system, and a vehicle braking system. Further described is a manufacturing method for a piston for a hydraulic unit or a piston-cylinder device of the braking system, and a manufacturing method for a piston-equipped assembly for a hydraulic unit or a piston-cylinder device of the braking system.