Vehicle Height Adjustment System with Ignition-Off Frequency Limiting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing vehicle height adjustment systems experience a decrease in battery capacity due to frequent charging and discharging, leading to shortened battery life, particularly when the ignition switch is set to OFF and multiple vehicle height adjustments occur for get-in and appearance improvement conditions.
Innovation Solution
A vehicle height adjustment system that limits the number of times the get-in-time vehicle height adjustment is performed within a set period when the ignition switch is OFF, using a counter to track and restrict these adjustments, thereby reducing battery usage and maintaining traveling stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle height adjustment is frequently performed when the ignition switch is OFF (for get-in and appearance improvement conditions), then the ease of operation and vehicle appearance are improved, but the battery capacity decreases rapidly and battery life is shortened
Solution Approach 1:
The system dynamically adjusts the vehicle height based on the ignition switch state and operational conditions. When the ignition is OFF, the system allows height adjustments for get-in assistance but implements dynamic limiting based on the number of adjustments already performed, balancing ease of operation with battery conservation
Solution Approach 2:
The system changes the operational parameters of the height adjustment function based on the ignition state. When ignition is OFF, the system modifies the adjustment criteria by limiting the number of times adjustments can be performed, thereby changing the energy consumption pattern to preserve battery life while still providing necessary functionality
2Shape
If the vehicle height adjustment is performed multiple times when the ignition switch is OFF, then the vehicle appearance improvement and ease of access are achieved, but the number of battery charge-discharge cycles increases
Solution Approach 1:
The system performs preliminary assessment of the ignition state and operational conditions before allowing height adjustments. By checking the ignition switch state in advance and pre-limiting the number of adjustments when OFF, the system prevents unnecessary battery cycles while still enabling appearance improvement and access assistance when truly needed
3Ease of operation
If the get-in-time vehicle height adjustment is allowed without limitation, then the ease of entering the vehicle is improved, but the battery capacity decreases and the system reliability deteriorates
Solution Approach 1:
The system implements feedback control by monitoring the number of height adjustments performed when the ignition is OFF. This feedback mechanism tracks the adjustment count and enforces limitations to prevent excessive battery discharge, thereby maintaining system reliability while still providing ease of access within safe operational boundaries
Data Source
AI summary
A vehicle height adjustment system includes: a vehicle height adjustment actuator provided for each wheel of a vehicle; a pressure medium intake and exhaust device configured to supply and exhaust a pressure medium to and from the vehicle height adjustment actuator; and a vehicle height adjustment unit including a computer, the vehicle height adjustment unit configured to: adjust a vehicle height by controlling the pressure medium intake and exhaust device, the vehicle height being a distance between the wheel and a vehicle body; adjust the vehicle height when a get-in estimation condition is satisfied; and limit a number of times the vehicle height is adjusted within a set period to a number of times smaller than a set number of times.