Autonomous Braking Control via Pump and Booster Integration
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Solution Overview
Problem
Conventional autonomous power braking systems face limitations in manufacturing costs, assembly complexity, and noise due to moderate pressure buildup dynamics achieved solely by pumps, lacking efficient integration with existing active brake boosters.
Innovation Solution
The integration of a pump and an active brake booster, such as an electromechanical or vacuum booster, for simultaneous or consecutive activation to achieve faster and quieter braking pressure buildup in wheel brake cylinders, reducing the need for additional components and enhancing pressure dynamics across the braking pressure range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only a pump is used for autonomous braking pressure buildup, then the system structure is simpler, but the pressure buildup dynamics are moderate and noise is generated
Solution Approach 1:
The patent combines the pump and active brake booster into a coordinated system where both components work together for autonomous braking pressure buildup. The control device activates both the pump and the active brake booster simultaneously or sequentially to achieve faster pressure buildup dynamics while utilizing existing system components, thereby resolving the contradiction between system simplicity and pressure buildup performance.
Solution Approach 2:
The active brake booster, originally designed for driver-assisted braking, is repurposed to perform autonomous braking pressure buildup. This multi-functional utilization of the existing active brake booster allows the system to achieve high pressure buildup dynamics without adding dedicated new components, thus maintaining structural simplicity while improving productivity.
2Quantity of substance
If only a pump is used for autonomous braking pressure buildup, then fewer components are required, but noise is generated and pressure buildup speed is limited
Solution Approach 1:
By merging the operations of the pump and active brake booster, the system achieves faster pressure buildup with reduced noise. The active brake booster operates more quietly than the pump alone, and when both are coordinated, the overall noise is reduced while maintaining component efficiency.
Solution Approach 2:
The coordinated activation of both pump and active brake booster allows the system to rush through the pressure buildup process more quickly, reducing the time during which noise is generated. The active brake booster can rapidly establish pressure without the prolonged operation noise associated with pump-only systems.
3Productivity
If the active brake booster and pump are jointly activated, then pressure buildup dynamics are enhanced, but control complexity increases
Solution Approach 1:
The control device incorporates feedback mechanisms to monitor the pressure buildup process and dynamically adjust the activation of the pump and active brake booster. This feedback control optimizes the coordination between the two components, managing control complexity while maintaining enhanced pressure buildup dynamics.
Solution Approach 2:
The control system dynamically adjusts the operation of the pump and active brake booster based on real-time braking requirements. The activation can be simultaneous or sequential, allowing flexible adaptation to different braking scenarios while managing control complexity through dynamic rather than static operation modes.
4Ease of manufacture
If existing active brake booster is utilized for autonomous braking, then manufacturing costs are reduced, but the system must handle both driver-assisted and autonomous functions
Solution Approach 1:
The active brake booster is designed to perform multiple functions: traditional driver-assisted braking and autonomous braking pressure buildup. This universal design reduces manufacturing costs by utilizing existing components while the control device manages the versatility of handling both function types through integrated control logic.
Solution Approach 2:
The control device segments the activation control of the active brake booster based on the braking mode detected. When autonomous braking is required, the control device activates the active brake booster in a specific manner distinct from driver-assisted braking, allowing the single component to handle multiple functions through controlled segmentation of its operation modes.
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 reduces manufacturing costs, assembly complexity, and noise, while enabling rapid and reliable autonomous braking, even in emergency situations, with improved pressure buildup dynamics and versatility for driver assistance and emergency braking applications.
Implementation Method 1
a boosting force is exertable on at least one adjustable piston of a master brake cylinder with the aid of active brake booster 12 activated by the at least one brake booster control signal 22, in such a way that an internal pressure in the master brake cylinder may be increased
Implementation Method 2
the at least one pump 14 activatable with the aid of the at least one pump control signal 20 in such a way that a braking pressure in the at least one wheel brake cylinder may be increased
Data Source
AI summary
A control device for an autonomous power braking system of a vehicle includes: an activation unit configured to (i) output a pump control signal to a pump of the braking system, taking into consideration a supplied presetting signal regarding an autonomous braking pressure buildup to be carried out, in such a way that a braking pressure in a wheel braking cylinder is increased by the activated pump, and (ii) output a brake booster control signal to an active brake booster of the braking system, taking the presetting signal into consideration, in such a way that a boosting force is exerted on at least one adjustable piston of a master brake cylinder of the braking system by the active brake booster in such a way that the braking pressure in the wheel brake cylinder is increased via an increased internal pressure in the master brake cylinder.