Anti-Lock Braking System with Automatic Hydraulic Brake Adjuster
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Drum-type braking systems in large, off-road vehicles require frequent calibration adjustments, leading to decreased vehicle availability and increased maintenance costs, and existing anti-lock braking systems may not be compatible with service braking systems that include an automatic hydraulic brake adjuster (AHBA).
Innovation Solution
A vehicle anti-lock braking system that incorporates an automatic hydraulic brake adjuster (AHBA) coupled with a pressure regulating device and a wheel speed sensor, controlled by a unit that adjusts brake actuating pressure based on wheel rotational speed to prevent wheel lock-up, thereby reducing the need for frequent calibration and ensuring compatibility with service braking systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If drum-type braking systems are used in large off-road vehicles, then braking force is sufficient, but frequent calibration adjustments are required
Solution Approach 1:
The AHBA device automatically adjusts brake shoe clearance and maintains optimal brake actuating pressure without manual intervention. The system self-regulates by sensing brake pressure and wheel speed, automatically compensating for wear and calibration drift, thereby eliminating the need for frequent manual calibration adjustments and maintaining vehicle availability.
Solution Approach 2:
The system incorporates wheel speed sensors and pressure sensors that continuously monitor braking conditions and feed this information back to the control unit. The control unit adjusts the AHBA operation based on this feedback, dynamically optimizing brake performance and preventing wheel lock-up while maintaining proper calibration without frequent manual adjustments.
2Reliability
If manual calibration adjustments are performed frequently, then braking system performance is maintained, but maintenance costs increase
Solution Approach 1:
The AHBA device performs automatic calibration adjustments and maintains optimal brake performance without requiring frequent manual intervention. The system self-regulates brake actuating pressure and shoe clearance, eliminating the need for repeated maintenance operations and reducing overall maintenance costs while preserving braking system reliability.
Solution Approach 2:
The system dynamically adjusts brake actuating pressure parameters based on real-time conditions detected by sensors. The control unit modifies pressure levels and adjustment rates adaptively, optimizing performance across different operating conditions while reducing the frequency of manual calibration interventions and associated maintenance costs.
3Reliability
If anti-lock braking control is added to drum-type braking systems, then wheel lock-up is prevented, but system complexity increases
Solution Approach 1:
The AHBA device serves multiple functions: it automatically adjusts brake shoe clearance, regulates brake actuating pressure, and provides anti-lock braking control. By combining these functions into a single integrated system, the patent reduces overall system complexity compared to having separate mechanisms for each function, while maintaining wheel lock-up prevention capability.
Solution Approach 2:
The system merges the automatic adjustment mechanism with the anti-lock braking control system into a unified AHBA unit. The control unit coordinates both the mechanical adjustment functions and the pressure regulation functions, consolidating multiple control elements into a single integrated system that prevents wheel lock-up without proportionally increasing complexity.
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 reduces the frequency and duration of brake actuation, preventing wheel lock-up and maintaining vehicle availability while minimizing maintenance costs by automatically adjusting brake pressure in response to wheel speed.
Implementation Method 1
at least one wheel speed sensor coupled to the vehicle wheel, the at least one wheel speed sensor configured to sense a rotational speed of the vehicle wheel
Implementation Method 2
at least one pressure regulating device coupled in flow communication with the at least one AHBA, the at least one pressure regulating device configured to regulate brake actuating pressure applied to the at least one braking mechanism through the at least one AHBA
Implementation Method 3
at least one braking mechanism configured to interact with a vehicle wheel
Data Source
AI summary
A vehicle anti-lock braking system includes at least one automatic hydraulic brake adjuster (AHBA) coupled in flow communication with at least one braking mechanism configured to interact with a vehicle wheel. The system also includes at least one pressure regulating device coupled in flow communication with the at least one AHBA. The system further includes at least one wheel speed sensor coupled to the vehicle wheel. The system also includes a control unit communicatively coupled to the at least one pressure regulating device and the at least one wheel speed sensor. The control unit is configured to actuate the at least one pressure regulating device at least partially as a function of the rotational speed of the vehicle wheel.