Brake Pedal Module With Parallel Feedback Units for Compact Pedal Feel
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Solution Overview
Problem
Brake-by-wire systems face integration challenges due to their size and difficulty in simulating a feedback behavior of the brake pedal, which is crucial for driver feedback.
Innovation Solution
A compact brake pedal module with a feedback unit comprising parallel counterforce and damping units, allowing for a shortened length without compromising feedback behavior, and a modular design for flexible installation and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a feedback unit with counterforce units is used to simulate brake pedal feedback behavior, then the feedback behavior is improved, but the size of the brake pedal module increases
Solution Approach 1:
The patent combines multiple counterforce units (first counterforce unit and second counterforce unit) and damping units into a single integrated feedback unit assembly. This merging allows the multiple functional elements to work together in a compact arrangement, achieving the desired feedback behavior while minimizing the overall size of the brake pedal module.
Solution Approach 2:
The feedback unit is arranged in a compact configuration that utilizes three-dimensional space efficiently. The counterforce units and damping units are positioned in a manner that optimizes the use of available space, allowing the feedback unit to achieve its functional requirements without increasing the overall footprint of the brake pedal module.
2Reliability
If multiple counterforce units and damping units are integrated into the feedback unit, then the feedback behavior is improved, but the complexity of the device increases
Solution Approach 1:
The feedback unit is designed as a multi-functional assembly where the first counterforce unit, second counterforce unit, and damping units all contribute to the overall feedback behavior. This universal design allows a single integrated unit to perform multiple functions that would otherwise require separate components, thereby improving feedback behavior while managing device complexity.
3Volume of moving object
If the feedback unit is shortened to reduce size, then the volume is reduced, but the feedback behavior may be compromised
Solution Approach 1:
The patent optimizes the parameters of the counterforce units and damping units to achieve the desired feedback behavior in a compact space. By adjusting parameters such as spring constants, damping coefficients, and geometric dimensions, the feedback unit delivers appropriate pedal feel and resistance without requiring excessive length or volume.
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 solution provides a compact brake pedal module that effectively simulates pedal feel with speed-dependent damping and hysteresis, facilitating easy integration into vehicle environments while reducing complexity and production costs.
Implementation Method 1
a first counterforce unit (24), which urges the brake pedal (12) into the rest position
Implementation Method 2
a damping unit (26), which acts in parallel with the first counterforce unit (24) as regards their interconnection
Implementation Method 3
When the brake pedal is actuated, the damping unit produces speed-dependent damping and hysteresis, thereby producing a pedal feel familiar to the driver
Data Source
AI summary
A brake pedal module for a brake-by-wire brake system of a vehicle is disclosed, having a brake pedal, which can be secured pivotably on the vehicle and can be moved between a rest position and an end position, and a feedback unit for producing a resistance during actuation of the brake pedal. The feedback unit has a first counterforce unit, which urges the brake pedal into the rest position, and at least one further counterforce unit, which acts in parallel with the first counterforce unit as regards their interconnection, and/or a damping unit, which acts in parallel with the first counterforce unit as regards their interconnection.