Brake Particle Suction Control for Pneumatic Line Cleaning
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Solution Overview
Problem
Pneumatic lines in friction braking systems tend to clog over time due to accumulated braking particles, leading to inefficiencies and potential noise issues during operation.
Innovation Solution
A method is introduced to control the braking particle suction system by implementing a cleaning suction sequence with a high airflow rate, triggered by predetermined criteria such as vehicle speed, distance traveled, and number of braking actions, to maintain the pneumatic lines in a clean state, using a control unit to manage the negative pressure source and airflow during both braking and cleaning sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction system operates continuously at high flow rate to clean pneumatic lines, then the cleaning effectiveness is improved, but the energy consumption increases and noise becomes problematic during normal operation
Solution Approach 1:
The suction system operates intermittently rather than continuously, with cleaning sequences activated only under specific conditions (vehicle speed above threshold, sufficient time/distance since last cleaning). This periodic operation maintains line cleanliness while minimizing energy consumption and noise during normal vehicle operation.
Solution Approach 2:
The system performs cleaning sequences in advance before clogging becomes problematic, based on predetermined criteria such as distance traveled, time elapsed, or number of braking actions. This preventive approach maintains reliability without requiring continuous high-energy operation.
2Reliability
If the suction system operates at high flow rate for cleaning sequences, then the cleaning effectiveness is improved, but noise is generated that may be audible during low-speed operation
Solution Approach 1:
The system schedules cleaning sequences based on vehicle speed thresholds, only activating high-flow suction when the vehicle is traveling above a predetermined speed. At these speeds, the vehicle's rolling noise masks the suction system noise. This resolves the noise issue while maintaining cleaning effectiveness.
Solution Approach 2:
The system changes the operating parameter (vehicle speed) as a condition for activating the cleaning sequence. By requiring minimum speed threshold to be met, the system ensures that cleaning operations occur only when environmental noise levels are sufficient to mask the suction noise.
3Reliability
If the suction system operates continuously to prevent clogging, then the pneumatic lines remain clean, but the system complexity and control requirements increase
Solution Approach 1:
The control system uses simple periodic triggers based on easily measurable parameters (vehicle speed, distance traveled, time elapsed, number of braking actions) rather than continuous monitoring and complex control algorithms. This maintains reliability while minimizing control system complexity.
Solution Approach 2:
The system automatically determines when cleaning is needed based on predetermined criteria and vehicle operating conditions, without requiring external intervention or complex decision-making. The control logic is self-regulating based on simple sensor inputs.
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
This approach ensures the pneumatic lines remain unclogged, reducing noise and maintaining system efficiency by periodically cleaning the lines during operation, minimizing the need for maintenance and preventing clogging.
Implementation Method 1
a negative pressure source (1), at least one suction mouth (83) arranged close to a friction interface or inside a friction part and connected by at least one pneumatic line (3, 30) to the negative pressure source
Implementation Method 2
the cleaning sequences are carried out at a high flow rate, by having increased the airflow-limiting cross-sectional area at the suction mouth
Data Source
AI summary
Method for controlling a braking particle suction system, the suction system including a negative pressure source, a suction mouth arranged close to a friction interface or inside a friction part and connected by a pneumatic line to the negative pressure source, and a control unit configured to control the negative pressure source in order to: a— control a braking suction sequence according to the current braking activation information, to ensure that suction is applied as soon as braking is activated; b— establish a cleaning suction condition, outside of braking sequences; c— as soon as the cleaning suction condition satisfies a predetermined criterion, control the negative pressure source for a cleaning sequence for the pneumatic line, for a predetermined duration.