Vehicle Pedal Simulator Structure for Brake Feel and Stroke Sensing
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Solution Overview
Problem
Conventional pedal simulators for vehicles face issues with increased parts and complexity, which complicate the replication of a mechanical braking sense, particularly in non-hydraulic brake systems and brake-by-wire systems.
Innovation Solution
A pedal simulator with a simplified structure comprising a housing, piston, elastic part, and damper, which includes a magnet for stroke measurement and guides for straight movement, allowing compatibility with various pedal types and reducing the need for a pedal return spring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pedal simulator uses multiple springs and dampers to replicate mechanical braking sense, then the braking sensation similarity improves, but the number of parts and shape complexity increase
Solution Approach 1:
The patent combines multiple springs and dampers into a single integrated elastic component with varying stiffness along its length. This merging approach maintains the complex braking sensation replication functionality while reducing the number of separate parts from multiple springs and dampers to one unified component.
Solution Approach 2:
The elastic component has different stiffness characteristics at different locations along its length, allowing it to provide varying elastic forces at different compression stages. This local quality variation enables the single component to replicate the complex braking sensation that previously required multiple components with different properties.
2Reliability
If a pedal simulator is designed with a specific structure to provide braking sense, then the braking sense is improved, but the adaptability to different pedal types decreases
Solution Approach 1:
The pedal simulator is designed with a universal mounting structure that can be installed on different types of pedals (e.g., pendant type and organ type pedals). The housing and mounting brackets are configured to accommodate various pedal shapes and sizes, allowing the same simulator design to provide braking sense across multiple pedal types without requiring redesign.
3Reliability
If a pedal simulator uses a complex structure with multiple components, then the braking sense replication is improved, but the repair and replacement costs increase
Solution Approach 1:
By merging multiple springs and dampers into a single elastic component, the patent reduces the number of parts that can fail and require replacement. This single-component design simplifies repair operations and reduces inventory requirements for maintenance, thereby lowering repair and replacement costs while maintaining braking sense replication quality.
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 cost-effective and versatile pedal simulator that reduces repair and replacement costs while ensuring consistent braking sensation across different pedal types, measuring pedal stroke, and preventing piston rotation.
Implementation Method 1
an elastic part configured to elastically support the piston within the housing
Implementation Method 2
a damper provided in the piston and compressed onto the housing by a contact
Data Source
AI summary
The present disclosure relates to a pedal simulator of a vehicle, the pedal simulator including a housing, a piston slidably disposed in the housing, an elastic part configured to elastically support the piston within the housing, and a damper provided in the piston and compressed onto the housing by a contact.