Accelerator Pedal Reaction Force Alignment for Accurate Lever Ratios
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing reaction force imparting devices for accelerator pedals suffer from inaccuracies in applying reaction forces due to misalignment of mounting positions, leading to deviations in lever ratios and target reaction force values.
Innovation Solution
A reaction force imparting device with an actuator housing, lever, fixing member, and positioning portion that ensures precise attachment and alignment of the pedal housing and actuator housing to the vehicle, maintaining consistent lever ratios and accurate reaction force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pedal housing and actuator housing are mounted to the vehicle without precise positioning, then the mounting process is simple and quick, but the alignment accuracy between the housings deteriorates, causing deviations in lever ratios and reaction force values
Solution Approach 1:
The positioning portion acts as an intermediary element between the pedal housing and actuator housing. It includes a positioning protrusion on one housing that fits into a positioning groove on the other housing, ensuring precise alignment without requiring complex external positioning mechanisms. This mediator structure directly addresses the alignment accuracy issue while maintaining simplicity.
Solution Approach 2:
The positioning portion is pre-formed on the pedal housing and actuator housing during manufacturing. The positioning protrusion and groove are built into the structures beforehand, so that when the housings are mounted together, the alignment is automatically achieved without requiring additional adjustment or complex positioning procedures during installation.
2Manufacturing precision
If the contact position between the lever and pedal arm is not precisely determined, then the device structure remains flexible and easy to manufacture, but the reaction force accuracy deteriorates due to lever ratio deviations
Solution Approach 1:
The positioning portion serves as a mediator that determines the contact position between the lever and pedal arm. By providing a fixed geometric relationship through the positioning protrusion and groove, the contact position is precisely determined without requiring complex adjustment mechanisms or difficult assembly procedures. The intermediary structure makes the precise positioning straightforward to manufacture and assemble.
Data Source
AI summary
An actuator is provided in an actuator housing. A lever is provided in the actuator housing, rotates by driving force from the actuator, contacts an arm that rotates together with the pedal, and is capable of imparting a reaction force to the pedal against a driver's depression force. A fixing member is formed so that a pedal housing and the actuator housing are fixed apart from each other, and are attachable to a vehicle. A positioning portion determines a contact position between an arm and the lever and between a rotation axis of the pedal and a rotation axis of the lever.