Wired Brake Module Pressure Boosting With Multi-Stroke Fluid Refill
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wired braking systems face challenges in handling extreme braking conditions, such as long downhill slopes, leading to increased brake caliper temperature, reduced friction coefficient, and deformation, requiring larger brake fluid volumes that traditional designs struggle to accommodate efficiently.
Innovation Solution
A control method for wired braking systems that includes estimating the forward stroke of the main piston, cutting off communication between the master brake cylinder and sub-brake cylinders when the stroke exceeds a threshold, retracting the piston to replenish fluid from the reservoir, and re-establishing communication to increase pressure, allowing for compact system design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the master brake cylinder is designed with larger volume to handle extreme braking conditions, then braking performance under extreme conditions is improved, but the device complexity and system size increase
Solution Approach 1:
The patent applies dynamics by making the master brake cylinder's communication state with sub-brake cylinders changeable rather than fixed. The master brake cylinder can dynamically switch between communicating and not communicating with sub-brake cylinders based on braking conditions, enabling a smaller cylinder to achieve extreme braking performance through multiple stroke cycles rather than requiring a permanently large capacity cylinder
Solution Approach 2:
The patent implements periodic action through multi-stage piston strokes. The main piston performs repeated forward and backward movements in stages: first stroke to initial pressure, then retracting to replenish fluid, second stroke to increase pressure further. This periodic cycling allows the system to accumulate braking pressure over time, enabling a compact cylinder design to achieve the braking force of a much larger cylinder designed for extreme conditions
2Reliability
If the main piston stroke is extended to provide more brake fluid for extreme conditions, then braking capability under extreme conditions is improved, but the loss of time during braking operation increases
Solution Approach 1:
The patent applies preliminary action by pre-positioning a reservoir connected to the master brake cylinder. Before the second braking stroke is executed, brake fluid is already available in the reservoir, allowing the piston to quickly replenish fluid during the retraction phase without time-consuming external refilling operations. This preliminary preparation enables rapid multi-stage braking responses
Solution Approach 2:
The patent maintains continuity of useful action by ensuring the master brake cylinder remains connected to the reservoir throughout the braking process. During piston retraction, fluid continuously replenishes the cylinder from the reservoir, and during forward stroke, pressure continuously builds in the sub-brake cylinders. This continuous fluid supply and pressure building eliminates idle time between braking stages
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 method effectively manages extreme braking conditions by optimizing fluid pressure distribution, enabling a more compact braking module that maintains braking performance under various conditions.
Implementation Method 1
driving the main piston in the master brake cylinder forward to compress the brake fluid in the master brake cylinder into the sub-brake cylinders of the brake calipers for each wheel, thereby establishing brake fluid pressure
Implementation Method 2
a first return spring between the main piston and the auxiliary piston, and a second return spring between the auxiliary piston and the end wall of the master brake cylinder
Data Source
AI summary
A control method for a wired braking system includes, when estimating that the current forward stroke of the main piston cannot satisfy the braking request, executing the current forward stroke until the stroke of the main piston reaches a first threshold, and then cutting off the communication between the master brake cylinder and each of the sub-brake cylinders; retracting the main piston until the master brake cylinder communicates with the reservoir, allowing brake fluid from the reservoir to replenish the master brake cylinder; advancing the main piston again and re-establishing communication between the master brake cylinder and each of the sub-brake cylinders to further increase the brake fluid pressure in each of the sub-brake cylinders; and estimating again whether the current forward stroke can satisfy the braking request.