Vehicle Pedal Set With Adjustable Trajectory and Minimal Stroke
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Solution Overview
Problem
Existing pedal sets in motor vehicles require a wide stroke for fluid pressure buildup, constraining the driver's position and limiting flexibility in cockpit space, and lack the ability to easily vary the pedal movement trajectory.
Innovation Solution
A pedal set with adjustable guides and sliders that allow the pedal to move along different trajectories, including a straight path with minimal stroke, and a remote or mechanical back-up braking system, enabling flexible driver positioning and easy reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a wide pedal stroke is used to build fluid pressure, then the braking pressure is sufficient, but the driver's positioning flexibility is constrained
Solution Approach 1:
The patent replaces the traditional mechanical lever-pedal system with an electrohydraulic actuator system. The actuator uses electrical signals and hydraulic fluid to generate braking force, eliminating the need for a wide mechanical pedal stroke. This substitution allows sufficient braking pressure to be achieved through electrical-hydraulic conversion rather than mechanical leverage, thereby freeing the driver from constrained positioning requirements.
Solution Approach 2:
The patent changes the fundamental operating parameters of the braking system by introducing an electrohydraulic actuator that controls braking pressure through electrical signals and fluid pressure regulation, rather than through mechanical pedal displacement. This parameter change enables sufficient braking force with minimal or no pedal stroke, resolving the contradiction between pressure generation and positioning flexibility.
2Device complexity
If a fixed arc-of-circumference pedal trajectory is used, then the mechanical linkage is simple, but the ability to vary pedal movement trajectory is limited
Solution Approach 1:
The patent eliminates the fixed arc-of-circumference mechanical linkage by replacing it with an electrohydraulic actuator system. The actuator can be controlled to produce various movement trajectories through electrical control signals, providing trajectory variability without complex mechanical linkages. The system achieves adaptability through electronic control rather than mechanical design.
3Reliability
If a mechanical backup braking system is added, then emergency braking reliability is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a mechanical backup braking system as an intermediary safety mechanism that operates independently of the primary electrohydraulic system. This backup system provides a simple mechanical connection between the pedal and braking mechanism, ensuring emergency braking capability even if the electrohydraulic system fails. The intermediary mechanical system adds minimal complexity while significantly improving reliability.
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 pedal set provides maximum flexibility in driver positioning, allowing various driving configurations and emergency braking modes, enhancing user comfort and safety.
Implementation Method 1
a spring interposed between the vehicle body and the lever in a position other than the fixed pivoting point and designed to allow the pedal to spring back once the driver's action ceases
Implementation Method 2
The operation of the command member causes the pressure increase of the operating liquid in the fluidic lines and the consequent pressure increase in the chambers housing the brake callipers. This pressure increase causes the pads to move from the relative rest positions to the relative operating positions
Data Source
AI summary
A pedal set for a motor vehicle includes a support body and a pedal which can be operated by a driver. The pedal set further includes a guide defined by the support body and a slider which can slide within the guide and is operatively connected to the pedal.