Brake Pedal Simulator With Displacement-Based Braking State Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicles without a brake vacuum booster, such as self-driving and electric vehicles, lack sufficient and clear brake feedback due to drive-by-wire systems, and innovative braking systems like Bosch iBooster face risks of malfunction, complexity, and high cost.
Innovation Solution
A brake pedaling simulator with a base seat, housing, pressure units, deceleration indication, sensing, and control units provides tactile feedback and evaluates braking states by calculating displacement values and differences between components to determine abnormal braking conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drive-by-wire system with brake-by-wire device is employed in vehicles without brake vacuum booster, then the braking system can function in electric and self-driving vehicles, but the brake feedback becomes insufficient and unclear
Solution Approach 1:
The patent introduces a simulator as an intermediary component between the brake pedal and the brake-by-wire device. The simulator includes a pressing member that mechanically connects to the brake pedal and a resilient member that provides tactile feedback, mediating the interaction between the driver and the electronic braking system to restore clear brake feedback
Solution Approach 2:
The patent replaces the traditional electronic feedback mechanism with a mechanical feedback system. The simulator uses a resilient member (spring) to provide mechanical resistance and tactile feedback to the driver, substituting the insufficient electronic feedback of the brake-by-wire system with a reliable mechanical feedback mechanism
2Measurement precision
If an electronic control motor-based braking system (Bosch iBooster) is used to provide brake feedback, then the brake feedback accuracy is improved, but the risk of electronic component malfunction increases and the system complexity, space occupation, and cost increase
Solution Approach 1:
The patent employs simple, inexpensive mechanical components (resilient member, pressing member, housing) instead of expensive electronic control motors. These mechanical components are reliable, easy to manufacture, and do not suffer from electronic component failures, providing a cost-effective alternative that reduces system complexity while maintaining brake feedback accuracy
Solution Approach 2:
The patent extracts the essential feedback function from the complex electronic control motor system and implements it through a simple mechanical resilient member. By taking out only the necessary feedback mechanism and implementing it mechanically, the system achieves accurate brake feedback without the complexity, space, and cost of electronic control motors
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 simulator offers reliable brake feedback and detects abnormal braking states, reducing the risk of electronic malfunctions and complexity while maintaining a compact design at a lower cost.
Implementation Method 1
The first biasing member is disposed between and abuts against the first pressing member and the base seat, and is compressed by the first pressing member when the first pressing member is pushed by the brake pedal
Implementation Method 2
The second biasing member is disposed between and abuts against the second pressing member and the base seat, and is compressed by the second pressing member when the second pressing member is pushed by the first pressing member to move along the axis
Implementation Method 3
The deceleration resilient member is disposed between and that abuts against the slidable block and the base seat, and that is compressed by the slidable block when the slidable block moves toward the base seat
Data Source
AI summary
A brake pedaling simulator includes a base seat, a housing, a deceleration indication unit, a sensing unit, a control unit, and first and second pressure units including their respective first and second pressing members and biasing members. The first pressing member is pushed by a brake pedal of a vehicle to compress the first biasing member and to push the second pressing member that compresses the second biasing member. The deceleration indication unit includes a movable slidable block. The sensing unit includes first and second sensors respectively sensing positions of the first pressing member and the slidable block and signally connected to the control unit. The control unit determines a braking state of the vehicle according to a difference between a displacement value of the first pressing member and a displacement value of the slidable block.