Emergency Braking Device for Hydraulic Brake Systems
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Solution Overview
Problem
Conventional emergency braking systems in vehicles require a power supply and may cause unnecessary or abrupt braking, leading to safety risks, especially in situations like power failures or specific traffic conditions, and cannot function without altering the standard hydraulic braking system.
Innovation Solution
An emergency braking device for hydraulic braking systems that uses a brake pedal and brake booster with a translation rod, allowing actuation of the master brake cylinder without power, featuring a hydraulic cylinder with a piston and elastic spring, enabling situation-adapted partial load braking without affecting the hydraulic circuit or standard braking system components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional emergency braking systems are activated, then immediate maximum braking is achieved, but safety risks increase due to abrupt braking and potential secondary collisions
Solution Approach 1:
The emergency braking system dynamically adjusts the braking force based on the vehicle's operating state (acceleration, deceleration, speed) and environmental conditions. The control unit calculates an optimal braking force that provides sufficient emergency stopping power while avoiding excessive deceleration that could cause secondary collisions or occupant injury.
Solution Approach 2:
The system changes the braking parameter (braking force) based on real-time sensor data about vehicle operation and environment. By monitoring acceleration, speed, and other parameters, the system adjusts the braking intensity to match the specific situation, transitioning from fixed maximum braking to adaptive variable braking.
2Ease of operation
If emergency braking systems require power supply, then controlled braking is possible, but system reliability decreases when power fails
Solution Approach 1:
The system uses the vehicle's existing operational sensors and powertrain control units to determine braking parameters, rather than requiring a separate power supply for sensing. The emergency braking system leverages available vehicle data (acceleration, speed, operating state) to autonomously calculate and apply appropriate braking force even when the vehicle's main power system fails.
3Reliability
If the emergency braking device acts on the translation rod, then the master brake cylinder is actuated without power, but the hydraulic circuit may be interfered with
Solution Approach 1:
The emergency braking system uses the translation rod as a mechanical intermediary to transfer force from the emergency braking actuator to the master brake cylinder. This mechanical linkage allows powerless actuation of the braking system by leveraging the existing hydraulic pressure and mechanical motion paths already present in the vehicle's braking architecture.
Solution Approach 2:
The translation rod serves multiple functions: it transmits driver input during normal braking operation and serves as the actuation mechanism for emergency braking when power is unavailable. By utilizing this existing multi-functional component, the system avoids adding separate dedicated emergency actuation hardware that could potentially interfere with the hydraulic circuit.
4Loss of time
If immediate maximum braking is applied, then stopping distance is reduced, but comfort and safety of occupants deteriorate
Solution Approach 1:
The system adjusts the braking force parameter based on real-time vehicle state and environmental conditions. By calculating optimal braking force rather than applying fixed maximum braking, the system achieves sufficient stopping performance while maintaining deceleration levels that protect occupant safety and comfort.
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
Enables safe, controlled emergency braking without power supply, reducing the risk of secondary collisions and allowing unrestricted actuation of the hydraulic braking system, with adjustable braking force based on operational states and environmental conditions, while maintaining the integrity of the standard braking system.
Implementation Method 1
an elastic spring acting axially towards the translation rod on the piston in the direction of the working chamber and thus in the direction of the brake pedal or the brake booster is provided, preferably as a compression spring in the system chamber
Implementation Method 2
By introducing a pressurized fluid into the working chamber, the piston is pressed against the elastic spring, i.e., axially along the translation rod towards the master cylinder
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
Emergency braking device comprising a hydraulic cylinder (1) with a piston (9) axially movable on the translation rod (8), which divides the internal volume of the hydraulic cylinder into a working chamber (2) and a system chamber (3) with a vent bore, a compression spring (13) acting axially on the piston towards the working chamber and the translation rod, an inlet opening (20) opening into the working chamber with a connection to a pressure source, a stop driver (15) axially displaceable on the translation rod in the system chamber for the piston, a self-locking adjusting actuator (14, 16, 17, 18, 19) for positioning the stop driver (15) in the system chamber, wherein the translation rod has at least one shoulder with a change in cross-section between the piston and the master brake cylinder, the shoulder being an axial stop for the piston, but not for the stop driver on the translation rod,the hydraulic cylinder is rigidly connected to the brake booster or the brake pedal and the master brake cylinder, and the translation rod is axially displaceable in the hydraulic cylinder, brake booster or brake pedal and master brake cylinder.