Electromechanical Brake Booster for Quiet Collision Avoidance
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Solution Overview
Problem
Current collision avoidance systems in vehicles face limitations in achieving sufficient pressure build-up dynamics and noise reduction during braking interventions, particularly in hydraulic/mechanical connections, which can impact the effectiveness and comfort of collision avoidance maneuvers.
Innovation Solution
The integration of an electromechanical brake booster (iBooster) with a subordinate ESP unit allows for asymmetrical braking torque, enabling quick and quiet brake pressure build-up, combined with wheel-specific interventions and control of active chassis components to change vehicle direction and speed, thereby avoiding collisions with objects or pedestrians.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a piston pump of an ESP hydraulic system is used for pressure build-up, then braking intervention is achieved, but the pressure build-up gradient is insufficient and considerable noise is generated
Solution Approach 1:
The patent replaces the mechanical piston pump system with an electromechanical brake booster that uses an electric motor to drive a spool valve and hydraulic pump. This substitution enables faster pressure build-up gradients while significantly reducing mechanical noise through electronic control and softer hydraulic operation, directly resolving the contradiction between power output and noise generation.
Solution Approach 2:
The patent changes the operational parameters of the braking system by introducing an electromechanical brake booster with electrically controlled spool valves that regulate hydraulic pressure dynamically. This allows for optimized pressure build-up rates and reduced noise levels through electronic parameter adjustment, rather than being constrained by fixed mechanical piston pump characteristics.
2Productivity
If the electromechanical brake booster is used for quick pressure build-up, then collision avoidance effectiveness is improved, but system complexity increases
Solution Approach 1:
The electromechanical brake booster is designed to perform multiple functions: it provides rapid pressure build-up for collision avoidance, enables asymmetrical braking for steering interventions, and integrates with the existing ESP system. This multi-functionality improves collision avoidance effectiveness while justifying the increased complexity through versatile operational capabilities.
Solution Approach 2:
The patent merges the electromechanical brake booster with the existing ESP hydraulic system, combining the new electrically controlled pressure build-up mechanism with the established electronic stability control infrastructure. This integration allows the system to leverage existing components while adding enhanced collision avoidance capabilities, balancing complexity improvement with functional enhancement.
3Adaptability or versatility
If asymmetrical braking torque is applied for directional control, then collision avoidance maneuverability is improved, but braking comfort is reduced
Solution Approach 1:
The electromechanical brake booster enables dynamic adjustment of braking torque distribution across different wheels through electrically controlled spool valves. This dynamic control allows for asymmetrical braking when collision avoidance maneuvering is required, while maintaining symmetrical braking for normal stopping, thus improving maneuverability without permanently compromising braking comfort.
Solution Approach 2:
The system applies asymmetrical braking torque periodically or temporarily only when collision avoidance is detected, rather than continuously. The electromechanical brake booster can rapidly switch between symmetrical and asymmetrical braking modes, providing directional control when needed while maintaining comfort during normal braking operations.
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 solution ensures effective and quiet collision avoidance by generating high brake pressure dynamically, allowing the vehicle to change direction or stop before a collision, while minimizing noise and enhancing the overall performance of the braking system.
Implementation Method 1
an electromechanical brake booster (iBooster) with a subordinate ESP unit
Implementation Method 2
brake force controlling components coupled thereto operatively integrated with a vehicle braking system for braking the vehicle
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a method for avoiding collision of a moving vehicle with at least one object which enters into and/or is located in a possible collision region during the vehicle movement, wherein the vehicle comprises: a sensor device for detecting the at least one object, wherein the sensor device monitors at least one collision region which is located in the environment of the vehicle; an electromechanical brake force booster and brake force-controlling components coupled thereto, which are integrated in an operational way into a vehicle braking system for braking the vehicle; a control device, which receives signals from the sensor device and, on the basis of these signals, controls the brake force booster and the brake force-controlling components and/or further active chassis components; and wherein, upon the detection of at least one object, the method changes a speed of travel and/or direction of travel of the vehicle with the aid of the control device in conjunction with the braking system and the brake force-controlling components in such a way that a collision with the at least one object is automatically avoided.