Power Trunk Spindle Synchronization via Hall Effect Feedback

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Solution Overview

Problem

In vehicles equipped with power trunks or tailgates, a difference in load between the left and right spindles can cause speed discrepancies between spindle motors, leading to bending loads and operational deviations.

Innovation Solution

A method is implemented to synchronize the operations of left and right spindle motors by measuring Hall effect counts and adjusting output ratios to maintain balanced operation, with alarms triggered for excessive errors or differences, and initializing synchronization values upon completion of close operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the power trunk or tailgate operates on a curved place or sloping road, then the center of gravity becomes decentered, but a load difference is generated between left and right spindles causing speed discrepancy

Engineering Contradiction:

Improveoperation on curved place or sloping roadVSAvoidspeed synchronization between spindle motors

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The control unit continuously monitors the operation state of left and right spindle motors and adjusts their driving forces based on detected speed differences, implementing a closed-loop feedback control system that maintains synchronization despite varying load conditions

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically changes the driving force parameters of the spindle motors by adjusting motor current or torque based on real-time speed feedback, allowing adaptation to different operating conditions while maintaining speed synchronization

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the load difference between left and right spindles is not compensated, then the structure is simple, but bending load and deviation are generated in the trunk or tailgate

Engineering Contradiction:

Improvecontrol system structureVSAvoidoperational stability of power trunk or tailgate

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system automatically detects and compensates for speed differences between spindle motors without external intervention, using self-contained sensors and control logic to maintain operational stability

Inventive Principle:

Principle #25Self-service

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 synchronization method prevents speed differences between spindle motors, ensuring stable operation of the power trunk or tailgate by adjusting output ratios based on Hall effect count comparisons.

Implementation Method 1

measuring a Hall effect count of a left spindle motor for driving a left spindle and a Hall effect count of a right spindle motor for driving a right spindle

Methodology Applied

Scientific EffectHall effect: Hall Effect

Data Source

PatentUS9631413B2Method of controlling power trunk or power tailgate with synchronization procedure between left and right spindles

Publication Date: 2017.04.25 MOTOTECH

AI summary

Disclosed is a method of effectively controlling a vehicle power trunk/tailgate in a vehicle power trunk/tailgate control system by performing a synchronization procedure between the left and right spindles in a vehicle having a power trunk/tailgate. Since a speed difference is not generated between the left and right spindle motors, the power trunk/tailgate can be driven more stably.