Commercial Vehicle Disk Brake Pressure Setting for Low Drag
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Solution Overview
Problem
Existing methods for setting application pressure in vehicle brakes result in significant friction torques and braking forces even when no deceleration is intended, leading to kinetic energy loss and increased wear.
Innovation Solution
A method that detects the brake infeed travel as a function of brake pressure, identifies the first pressure range, and sets the application pressure within this range to minimize frictional losses while ensuring rapid braking response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the application pressure is increased to reduce the release clearance and improve brake response time, then the brake response time is improved, but the friction torque and energy loss increase
Solution Approach 1:
The patent applies dynamics by making the application pressure adaptive rather than fixed. The brake control device continuously monitors brake pad wear and adjusts the application pressure dynamically to optimize the balance between response time and energy loss. This allows the system to maintain minimal release clearance for rapid response while avoiding excessive friction torques that would cause energy loss.
Solution Approach 2:
The patent changes the parameter of application pressure from a fixed value to a variable parameter that depends on brake pad wear. By adjusting this parameter based on actual wear conditions, the system achieves optimal brake response time while minimizing frictional losses and energy waste.
2Loss of time
If the application pressure is increased to minimize the release clearance, then the brake response time is improved, but the wear on the vehicle brake increases
Solution Approach 1:
The system dynamically adjusts the application pressure based on real-time brake pad wear detection. This dynamic adaptation allows the brake control device to maintain optimal response time while preventing excessive wear by avoiding unnecessarily high application pressures when not required.
Solution Approach 2:
The patent implements feedback by using a detection device to monitor brake pad wear and feeding this information back to the brake control device. The control device then adjusts the application pressure based on this feedback, creating a closed-loop system that optimizes both response time and wear prevention.
3Ease of operation
If a fixed parameterized application pressure is used, then the brake response behavior is advantageous, but the friction torques and braking forces are considerable even when no deceleration is demanded
Solution Approach 1:
The patent transforms the static, fixed parameterized application pressure into a dynamic value that adapts to actual brake conditions. The brake control device calculates and adjusts the application pressure based on detected brake pad wear, ensuring advantageous response behavior is maintained while minimizing unnecessary friction torques during coasting or freewheeling operations.
Solution Approach 2:
The brake system performs self-service by automatically detecting its own wear state and adjusting its operating parameters accordingly. The detection device monitors the brake pad condition and the control device autonomously optimizes the application pressure, eliminating the need for manual intervention while maintaining optimal performance and minimizing energy loss.
Data Source
AI summary
A method for setting an application pressure of a vehicle brake of a motor vehicle having a commercial vehicle disk brake, wherein, as the brake pressure increases in a first pressure range, the vehicle brake feeds in a brake pad by a brake infeed travel in the direction of the brake disk, crossing a release clearance, with an increase in a friction torque, and, as the brake pressure increases further in a second pressure range, the brake disk is fed in fully and there is a further increase in the friction torque at the vehicle brake. The method steps detect the brake infeed travel as a function of the brake pressure, identify the first pressure range on the basis of the detected brake infeed travel as a function of brake pressure, set an application pressure of the vehicle brake to a pressure within the first pressure range.