Vehicle Seat Controller Speed Adjustment for Shock Reduction
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Solution Overview
Problem
Existing vehicle seat controllers fail to smoothly and promptly change seat positions in multiple directions, such as longitudinal, vertical, and tilt angles, often causing discomfort due to shock experienced by occupants during these movements.
Innovation Solution
A vehicle seat controller that adjusts the speed change degrees in each direction during position changes, setting the longitudinal speed change lower than vertical and tilt angle speed changes, and varying the speed settings based on movement directions to minimize shock, using a combination of motors with adjustable energization characteristics and a control unit to manage these changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the seat position is changed rapidly in multiple directions, then the responsiveness and productivity are improved, but the shock felt by the occupant increases causing discomfort
Solution Approach 1:
The patent applies different speed change degree settings to different movement directions (longitudinal, vertical, tilt angle). The longitudinal direction uses a smaller speed change degree while vertical and tilt angle directions use larger speed change degrees, optimizing comfort and responsiveness for each specific direction independently
Solution Approach 2:
The controller dynamically adjusts the speed change degree based on the specific movement direction and phase (starting vs. stopping). The system switches between different control parameters to minimize shock at critical moments while maintaining overall responsiveness
2Object-affected harmful factors
If the voltage applied to the motor is limited upon starting and stopping, then the shock to the occupant is reduced, but the seat position change becomes slower
Solution Approach 1:
The patent applies different voltage control strategies to different directions. The longitudinal motor uses conservative voltage limiting for comfort, while vertical and tilt angle motors allow more aggressive voltage application for faster response, optimizing both comfort and speed for each direction
Solution Approach 2:
The controller dynamically adjusts voltage application based on the movement phase (starting vs. stopping) and direction. During starting, voltage is controlled to prevent excessive acceleration shock, while during stopping, voltage is adjusted to ensure smooth deceleration, maintaining responsiveness without compromising comfort
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
Enables rapid and smooth seat position changes in multiple directions, reducing occupant discomfort by optimizing speed settings for each movement direction, thus enhancing the overall seating experience.
Implementation Method 1
a motor, and a controller that controls the motor
Data Source
AI summary
A seat position controller performs seat position change processing by performing longitudinal position change processing and at least one of vertical position change processing and tilt angle change processing. When the seat position controller performs the seat position change processing, a change degree setting part sets the degree of speed change in the longitudinal direction of a seat main body during the longitudinal position change processing smaller than the degree of speed change in the vertical direction of the seat main body during the vertical position change processing, and the degree of speed change in a tilt angle direction of a seat back during the tilt angle change processing.