Accelerator Pedal Reaction Force Linkage for Contact Point Stability
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Solution Overview
Problem
Existing reaction force applying devices experience deviations in the contact point between the lever and the arm of an accelerator device, leading to reduced effectiveness in driver notifications due to increased deviation of reaction force, which can affect dangerousness and fuel efficiency notifications.
Innovation Solution
The device includes an actuator housing, actuator, lever, connected part, and connecting part, where the connected part is provided in the pedal housing and the connecting part is connected to the actuator housing, reducing the variation in the relative position between the pedal and actuator housings, thereby minimizing the deviation of the reaction force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lever and arm are allowed to contact freely without position constraints, then the device complexity is reduced, but the contact point deviation increases leading to reduced driver notification effectiveness
Solution Approach 1:
A positioning member is introduced as an intermediary component between the lever and the arm. This positioning member is provided on the lever and contacts the arm at a specific position, serving as a mediator that ensures accurate contact point positioning without requiring complex constraint structures. The positioning member effectively bridges the gap between the two components while maintaining precise alignment.
Solution Approach 2:
The positioning member is designed to preliminarily establish the correct contact point position before the lever and arm engage during operation. By pre-positioning the contact point through the positioning member, the system ensures that when the lever contacts the arm, the contact occurs at the intended location, thereby preventing deviation without requiring complex real-time adjustment mechanisms.
2Ease of operation
If the reaction force applying device is positioned away from the accelerator device, then the ease of operation is improved, but the contact point deviation increases leading to reduced driver notification effectiveness
Solution Approach 1:
The positioning member acts as an intermediary that compensates for the distance between the reaction force applying device and the accelerator device. By providing a dedicated positioning feature on the lever that contacts the arm, the system maintains precise contact point alignment even when the devices are positioned at convenient distances for driver operation, thus resolving the contradiction between operational ease and positioning precision.
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
This configuration reduces the deviation of the reaction force, ensuring effective driver notifications by maintaining consistent contact points, thus preventing a deteriorated feeling of driver notifications.
Implementation Method 1
an actuator provided in the actuator housing to apply a reaction force to the pedal with respect to a stepping force of the driver
Implementation Method 2
a lever provided at the actuator housing to be rotatable by receiving a driving force from the actuator, to contact the pedal or an arm rotating with the pedal, and to apply a reaction force to the pedal with respect to the stepping force of the driver
Data Source
AI summary
A reaction force applying device includes an actuator housing, an actuator, a lever, a connected part, and a connecting part. The actuator housing is attachable to a vehicle. The actuator is provided in the actuator housing. The lever is provided in the actuator housing to be rotatable by receiving a driving force from the actuator, to contact an arm that rotates with a pedal, and to be capable of applying a reaction force to the pedal against a driver's stepping force. The connected part is provided in a pedal housing, and the connecting part is provided in the actuator housing and connected to the connected part.