TPMS Reset Control to Prevent Wrong Low-Pressure Recalibration

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Solution Overview

Problem

Tire pressure monitoring systems (TPMS) can incorrectly reset tire pressure settings due to user error, leading to delayed or missed alerts for low tire pressure, which may cause accidents.

Innovation Solution

A system and method that utilize a wheel speed sensor and a set button to determine the user's intention for resetting tire pressure, activating a pressure setting reset prohibition mode when the vehicle stops and the set button is manipulated, and outputting warnings for wrong button manipulations, preventing system resets during low tire pressure conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the TPMS allows immediate reset upon button manipulation, then the ease of operation is improved, but the reliability deteriorates due to wrong manipulation during low pressure states

Engineering Contradiction:

Improveease of reset operationVSAvoidaccuracy of pressure monitoring

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs preliminary verification by detecting whether the vehicle is stopped before allowing reset operation. This preliminary check prevents wrong manipulation during low pressure states while maintaining ease of operation when the vehicle is properly stopped and pressure is normal.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides feedback through warning signals when reset is attempted during low pressure states or when the vehicle is moving. This feedback mechanism guides the user to wait until appropriate conditions are met, resolving the contradiction between ease of operation and reliability.

Inventive Principle:

Principle #23Feedback

2Reliability

If the TPMS activates reset prohibition mode, then the reliability is improved by preventing wrong manipulation, but the ease of operation worsens due to additional restrictions

Engineering Contradiction:

Improveprevention of wrong resetVSAvoidconvenience of reset function

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The reset prohibition mode is dynamically activated and deactivated based on real-time conditions (vehicle motion state and tire pressure status). The mode automatically transitions from prohibited to allowed when conditions are met, maintaining ease of operation while ensuring reliability during critical states.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameter of reset function from always available to conditionally available based on vehicle state and pressure status. This parameter change ensures reliability by blocking reset during low pressure states while restoring convenience when conditions are appropriate.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11820179B2System for monitoring tire pressure and method for sensing malfunction thereof

Publication Date: 2023.11.21 HYUNDAI MOTOR CO LTD

AI summary

An embodiment system for monitoring a tire pressure includes a wheel speed sensor mounted on each wheel of a vehicle, a set button for resetting a pressure setting, and a controller configured to determine whether the tire pressure is low using the wheel speed sensor, output a low pressure warning, determine whether a user has an intention to reset the pressure setting when a manipulation of the set button is sensed after the low pressure warning is output, and reset the pressure setting in response to a response of the user.