Multi-Piston Brake Disengagement for Even Disc Pack Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing piston disengagement systems for motor vehicle braking devices are inefficient in distributing actuation force evenly across multiple disc packs, leading to potential hotspots and reduced braking performance.
Innovation Solution
A multi-piston disengagement system with an annular housing and multiple hydraulic actuation assemblies, featuring a force distribution device with a ring design and adjustable teeth heights to distribute actuation force evenly across the brake device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single piston disengagement system is used, then the structure is simple, but the actuation force distribution is uneven leading to hotspots
Solution Approach 1:
The single piston system is segmented into multiple piston units (first, second, third, and fourth piston units) arranged circumferentially around the central axis. Each piston unit independently actuates a separate disc pack, distributing the actuation force evenly across multiple contact points. This segmentation eliminates hotspot formation by ensuring uniform pressure distribution across all friction discs.
Solution Approach 2:
The system employs a composite structural design combining a central pressure chamber with multiple circumferential piston units. The housing integrates both the central chamber and circumferential chambers into a unified structure, allowing coordinated actuation of all piston units through a single fluid pressure source while maintaining structural efficiency.
2Reliability
If multiple piston units are added to distribute force evenly, then braking performance consistency improves, but device complexity increases
Solution Approach 1:
Multiple piston units are merged into a single integrated housing structure. The central pressure chamber and circumferential pressure chambers are combined into one unified housing, allowing all piston units to be actuated simultaneously through a single fluid pressure source. This merging reduces the number of independent fluid systems needed while maintaining even force distribution across all disc packs.
Solution Approach 2:
The central pressure chamber serves multiple functions: it houses the actuation mechanism and provides fluid pressure to all circumferential piston units simultaneously. The housing structure performs dual functions as both the structural framework and the fluid containment system for all pressure chambers, reducing overall system complexity despite the presence of multiple piston units.
3Ease of operation
If hydraulic fluid is introduced into the pressure chambers, then the piston units are actuated effectively, but potential fluid leakage paths increase
Solution Approach 1:
The pressure chambers are nested within the housing structure in a concentric arrangement. The central pressure chamber is positioned at the center, with circumferential pressure chambers arranged around it, all nested within the single housing. This nested configuration minimizes the number of external connections and potential leakage paths while maintaining effective hydraulic actuation of all piston units.
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 system effectively distributes actuation force across multiple disc packs, preventing hotspots and ensuring consistent braking performance, even under varying hydraulic pressures.
Implementation Method 1
The pressure chambers are fluidically connected to one another by means of the flow channel. When hydraulic pressure is applied, the piston can carry out an actuation stroke
Implementation Method 2
Each actuation assembly may include a spring assembly which includes a return device. The return device may be designed to return the piston in an axially opposite direction
Implementation Method 3
The actuation force causes the friction plates to be pressed together in a frictional manner to generate a braking force
Data Source
AI summary
A multi-piston disengagement system for a vehicle braking device includes an annular housing formed from a main housing and a housing cover, and a plurality of hydraulic actuation assemblies. The annular housing includes a main axis defining an axial direction, a plurality of housing portions, a plurality of pressure chambers, and a flow channel fluidically connecting the plurality of pressure chambers. Each one of the plurality of pressure chambers is arranged in a respective one of the plurality of housing portions and arranged to be filled with a fluid. Each one of the plurality of hydraulic actuation assemblies includes a piston arranged in a respective one of the plurality of pressure chambers and axially movable therein. The piston is arranged to displace in an actuation stroke for introducing an actuation force into the vehicle braking device when a hydraulic pressure is applied to the fluid.