Integral Sealing Throttle Element for Master Brake Cylinder
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Solution Overview
Problem
Existing master brake cylinder arrangements suffer from delayed and oscillating pressure build-up during brake actuation due to dynamic leakage streams, leading to instability and potential pulsation, which is exacerbated by complex and costly constructions of separate throttle flaps that are prone to incorrect assembly and jamming.
Innovation Solution
An integral structural unit combining a sealing element and throttle element, where the throttle element is movable relative to a through-opening, allowing for pressure-dependent throttling or de-restriction of the fluid stream, eliminating the need for complex multi-part arrangements and enabling faster and more uniform pressure build-up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate throttle flaps are used to control fluid flow, then pressure build-up can be controlled, but the construction becomes complex and costly, and the throttle flaps are prone to incorrect assembly and jamming
Solution Approach 1:
The patent combines the sealing element and throttle element into a single integral structural unit. The throttle element is formed as part of the sealing element, eliminating the need for separate throttle flaps. This integration resolves the contradiction by maintaining pressure control functionality while simplifying the construction and eliminating assembly errors and jamming issues associated with separate components.
Solution Approach 2:
The sealing element is designed to perform multiple functions: it provides sealing between the fluid reservoir and master brake cylinder housing, and simultaneously incorporates the throttle element for fluid flow control. This multi-functionality resolves the contradiction by consolidating multiple components into one, reducing complexity while maintaining the necessary pressure build-up control.
2Reliability
If separate throttle flaps are used to control fluid flow, then pressure build-up can be controlled, but assembly becomes more complex and error-prone
Solution Approach 1:
The patent combines the sealing element and throttle element into a single integral structural unit. The throttle element is formed as part of the sealing element, eliminating the need for separate throttle flaps. This integration resolves the contradiction by maintaining pressure control functionality while simplifying the construction and eliminating assembly errors and jamming issues associated with separate components.
3Productivity
If holes in the pressure piston are used for fluid connection, then fluid flow is allowed, but delayed and oscillating pressure build-up occurs due to dynamic leakage streams
Solution Approach 1:
The throttle element acts as an intermediary between the fluid reservoir and pressure chamber. It controls and regulates the fluid flow through the connecting region, preventing uncontrolled leakage through the piston holes. This resolves the contradiction by providing stable, controlled pressure build-up while maintaining the necessary fluid connection, eliminating the oscillating pressure effects caused by dynamic leakage streams.
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 integral structural unit ensures reliable and economical operation by stabilizing pressure build-up, reducing assembly complexity, and preventing fluid backflow, resulting in a faster and more uniform brake pressure response with reduced risk of jamming or incorrect assembly.
Implementation Method 1
at least one throttle element is provided in the connecting region, which throttle element as a function of the pressure conditions in the pressure chamber throttles or derestricts the fluid stream between the fluid reservoir and the pressure chamber
Implementation Method 2
the fluid reservoir in the connecting region is received, in a manner sealed by means of a sealing element, in a receiving portion of the master brake cylinder housing
Implementation Method 3
the at least one pressure piston together with the master brake cylinder housing sealingly encloses a pressure chamber which, as a function of the position of the pressure piston, is fluidically connected to or separated from the fluid reservoir
Data Source
AI summary
A master brake cylinder arrangement (10) for a motor vehicle brake system, comprising a master brake cylinder housing (12) with a cylindrical recess (28), at least one pressure piston (30, 32) which is displaceable and sealingly guided in the cylindrical recess (28) of the master brake cylinder housing (12), a fluid reservoir (14) which is fluidically coupled to the master brake cylinder housing (12) via a connecting region (22) and which serves for storing brake fluid, wherein the at least one pressure piston (30, 32) together with the master brake cylinder housing (12) sealingly encloses a pressure chamber (38, 40) which, as a function of the position of the associated pressure piston (30, 32), is fluidically connected to or separated from the fluid reservoir (14), wherein furthermore the at least one pressure chamber (38, 40) can be or is fluidically coupled to a fluid circuit of the motor vehicle brake system, wherein the fluid reservoir (14) in the connecting region (22) is received, in a manner sealed by means of a sealing element (62), in a receiving portion (26) of the master brake cylinder housing (12), and wherein at least one throttle element (66) is provided in the connecting region (22), which throttle element as a function of the pressure conditions in the at least one pressure chamber (38, 40) throttles or derestricts the fluid stream between the fluid reservoir (14) and the at least one pressure chamber (38, 40) through the connecting region (22). In said master brake cylinder arrangement it is provided that the at least one throttle element (66) is combined with the sealing element (62) so as to form an integral structural unit.