Adjustable Pedal Reaction Simulator for Regenerative Brake Feel
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Solution Overview
Problem
Existing pedal reaction simulators in vehicles fail to provide customizable pedal feeling adjustments, as they are often fixed once the appearance of the rubber simulator is determined, and decoupled brake pedal reaction simulators do not effectively account for varying regenerative braking levels, leading to inconsistent pedal feedback.
Innovation Solution
A pedal reaction simulator with a cylinder, rotation element, piston, elastic elements, and an adjustment device that allows for adjusting the preload of elastic elements to change the pedal feeling by altering the shape of the sliding groove and resistance provided by the rotation resistance device, enabling customizable soft or hard pedal feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the appearance design of the rubber simulator is used to implement different pedal reaction curves, then different pedal feelings can be achieved, but the design becomes too complicated and the workload is large
Solution Approach 1:
The patent changes the physical parameters of the elastic element (preload force, stiffness) to achieve different pedal reaction curves. By adjusting the preload of the elastic element through the adjustment device, multiple pedal feelings (soft, medium, hard) are achieved without changing the rubber simulator's appearance design, thus reducing design complexity while maintaining adaptability.
Solution Approach 2:
The patent introduces an adjustable elastic element with variable preload instead of a fixed rubber simulator design. The adjustment device allows dynamic modification of the pedal reaction characteristics by changing the elastic element's preload state, enabling flexible adaptation of pedal feeling without redesigning the rubber simulator geometry.
2Stability of the object's composition
If the rubber simulator appearance is determined, then the structure is fixed, but the pedal feeling cannot be adjusted anymore
Solution Approach 1:
The patent separates the pedal reaction simulation function into two independent parts: the rubber simulator (providing stable structural support) and the elastic element (providing adjustable reaction force). This segmentation allows the rubber simulator appearance to remain fixed and stable while the elastic element's preload can be adjusted to change pedal feeling, thus resolving the contradiction between structural stability and adaptability.
Solution Approach 2:
The patent introduces a dynamic adjustment mechanism (adjustment device) that modifies the elastic element's preload independently of the fixed rubber simulator structure. This enables the pedal feeling to be dynamically adjusted through preload variation while the overall structural composition remains stable and unchanged.
3Adaptability or versatility
If a non-decoupled brake pedal reaction simulator is affected by regenerative braking levels, then the system integrates regenerative braking compensation, but the pedal feeling becomes inconsistent
Solution Approach 1:
The patent extracts the regenerative braking compensation effect from the pedal reaction simulation and handles it separately through braking force compensation mechanisms. The elastic element with adjustable preload provides consistent baseline pedal feeling, while the regenerative braking compensation is applied as a separate control function, preventing interference between the two functions and ensuring pedal feeling consistency.
Solution Approach 2:
The patent introduces a decoupling mechanism that acts as an intermediary between the regenerative braking system and the pedal reaction simulator. This intermediary (braking force compensation device) isolates the pedal reaction simulation from the variable regenerative braking effects, allowing consistent pedal feeling to be maintained while still providing appropriate compensation for regenerative braking levels.
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 dynamically adjusts pedal reaction curves to meet user preferences, offering customizable soft or hard pedal feelings by modifying the preload of elastic elements, enhancing user experience and safety.
Implementation Method 1
a first elastic element mounted in the second accommodation space to elastically support the piston
Implementation Method 2
including a second elastic element, and configured to provide a resistance to a rotation of the rotation element
Implementation Method 3
the at least one sliding guide member may be slidably mounted in a corresponding sliding groove
Data Source
AI summary
A pedal reaction simulator for the vehicle includes a cylinder providing a first accommodation space therein; a rotation element rotatably mounted in the first accommodation space, providing a second accommodation space therein, and including at least one sliding groove of a predetermined shape penetrating the second accommodation space formed on an external circumferential wall; a piston including at least one sliding guide member corresponding to the sliding groove and movably provided in the second accommodation space through a first end portion of the rotation element; a first elastic element mounted in the second accommodation space to elastically support the piston; a rotation resistance device provided in the cylinder, including a second elastic element, and providing a resistance to a rotation of the rotation element; and an adjustment device provided on the cylinder and adjusting a preload of the second elastic element.