Parking Brake Force Management via Energy-Based Adjustment Tables
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle electric brake systems face challenges in maintaining consistent parking brake force due to dimensional variations caused by temperature changes, leading to unnecessary adjustments that consume energy and contribute to premature aging of actuators.
Innovation Solution
A method is introduced to manage parking braking by establishing direct adjustment tables based on previous braking situations and ambient temperatures, allowing for selective adjustments that minimize force variations and reduce the frequency of adjustments, thereby extending the service life of actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct adjustment tables are used to compensate for thermal expansion, then parking brake force consistency is improved, but adjustment frequency increases causing premature actuator aging
Solution Approach 1:
The patent applies parameter changes by establishing multiple direct adjustment tables corresponding to different braking energy levels. The control system selects the appropriate adjustment table based on the detected braking energy level, thereby adapting the pusher position adjustments to match the actual thermal expansion conditions. This prevents excessive adjustments in low-energy braking scenarios while ensuring adequate compensation in high-energy scenarios, thus extending actuator service life while maintaining parking brake force consistency.
2Reliability
If frequent adjustments are made to maintain parking brake force, then force consistency is improved, but energy consumption increases
Solution Approach 1:
The patent reduces energy consumption by changing the parameter of adjustment frequency based on braking energy levels. By detecting the braking energy level and selecting from multiple pre-established adjustment tables, the system performs adjustments only when necessary (in high-energy braking cases) rather than applying frequent uniform adjustments. This significantly reduces the operational cycles of the electric motor and associated components, thereby lowering energy consumption from the vehicle battery while maintaining parking brake effectiveness.
3Device complexity
If a single adjustment table is used for all braking situations, then system complexity is reduced, but parking brake effectiveness decreases in varying conditions
Solution Approach 1:
The patent applies segmentation by dividing the adjustment strategy into multiple distinct adjustment tables, each corresponding to a specific braking energy level. Instead of using a single adjustment table for all conditions, the system segments the operating conditions and provides tailored adjustment profiles for each segment. The control system detects the current braking energy level and selects the appropriate segmented table, ensuring optimal parking brake effectiveness for each braking scenario while maintaining manageable system complexity through pre-established tables.
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 that the parking brake force is maintained with minimal energy consumption and reduced risk of premature aging by accurately anticipating dimensional changes, ensuring compliance with the required force levels without inducing excessive forces during cooling.
Implementation Method 1
at least one electromechanical actuator which comprises a pusher actuated by a motor electrical system to selectively apply a force to the friction elements of the brake
Implementation Method 2
given the dimensional variations of the components of the brake as a function of the temperature
Data Source
Figure 1~2
Figure 3~5
AI summary
The invention relates to a method for managing parking braking in a braking system for a vehicle equipped with at least one electric brake comprising at least one electromechanical actuator (8) which includes a pusher (13) actuated by an electric motor to selectively apply a force on friction elements (11) of the brake, the method comprising the steps: - establishing a series of direct adjustment tables for parking braking corresponding to braking situations at different energy levels, - during parking braking, selecting a direct adjustment table in relation to a braking situation preceding the activation of parking braking, and - directly adjusting a parking brake force according to the selected direct adjustment table.