Flush Door Handle Heating Mechanism for Ice Prevention

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Solution Overview

Problem

Vehicle door handles often become inaccessible due to ice formation in cold climates, preventing the deployment from a flush to an extended position, which hinders operation.

Innovation Solution

A heating mechanism integrated with the door handle, activated by a remote transmitter, maintains the surface temperature above freezing, ensuring the handle can be deployed by melting ice and preventing re-icing through a temperature sensor and timed operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If the door handle is designed as a flush-mounted deployable handle, then the aesthetic appearance and security when not in use are improved, but the handle becomes inaccessible when ice forms on the exterior surface

Engineering Contradiction:

Improveflush-mounted designVSAvoidaccessibility of handle

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

The heating mechanism is activated before the user approaches the vehicle (via remote transmitter or automatic temperature sensing), pre-clearing ice from the handle area. This preliminary action ensures the deployable handle remains accessible despite the flush-mounted design that normally conceals it.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces manual mechanical access to the handle with a thermal field (heating mechanism) that melts ice barriers. This substitution allows the handle to remain flush-mounted for aesthetics while ensuring accessibility through thermal rather than mechanical means.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If a heating mechanism is added to melt ice on the door handle, then the accessibility and operability of the handle in cold climates is improved, but the device complexity and energy consumption increase

Engineering Contradiction:

Improvehandle operability in cold climatesVSAvoidheating mechanism integration

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The heating mechanism incorporates automatic temperature sensing and control that activates heating only when ice conditions are detected or when a user initiates vehicle access. This self-regulating system reduces unnecessary complexity and energy waste while maintaining handle operability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The heating mechanism serves multiple functions: it melts ice on the handle, prevents re-icing through maintained temperature, and can be integrated with existing vehicle remote start or access systems. This multi-functionality justifies the added complexity by providing comprehensive cold-weather operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If the heating mechanism is continuously activated to prevent ice formation, then the handle remains consistently accessible, but the energy consumption increases significantly

Engineering Contradiction:

Improveconsistent handle accessibilityVSAvoidenergy consumption of heating mechanism

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The heating mechanism operates periodically rather than continuously - activating when temperature sensors detect freezing conditions or when a user initiates vehicle access via remote transmitter. This periodic operation maintains handle accessibility while dramatically reducing energy consumption compared to continuous heating.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Temperature sensors provide feedback to the heating control system, which activates heating only when ice conditions are detected or when pre-heating is requested. This feedback-controlled operation ensures consistent handle accessibility while minimizing energy waste through condition-based activation.

Inventive Principle:

Principle #23Feedback

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

Ensures the door handle can be operated from a flush to an extended position even in icy conditions and maintains the handle clear of ice for user access, enhancing usability and safety.

Implementation Method 1

A heating mechanism is in thermal communication with the outer face of the door handle and the exterior surface of the vehicle door immediately surrounding the door handle

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

maintains the surface temperature above freezing, ensuring the handle can be deployed by melting ice

Methodology Applied

Scientific EffectMelting: Melting

Data Source

PatentUS10590677B2Heated mechanism for deployable exterior door handle for a vehicle

Publication Date: 2020.03.17 FORD GLOBAL TECH LLC

AI summary

A vehicle includes a door-operating mechanism for selectively releasing a vehicle door from a closed position. A door handle is in communication with the door operating mechanism. The door handle is operable between a flush position, wherein an outer face of the door handle is flush with a portion of an exterior surface of the vehicle door such that only the outer face of the door handle is accessible, and an extended position, wherein the outer face of the door handle is moved away from the exterior surface of the vehicle door such that a rear surface of the door handle is accessible. A heating mechanism is in thermal communication with the outer face of the door handle and the exterior surface of the vehicle door. A remote transmitter is in communication with the heating mechanism, wherein the remote transmitter selectively activates the heating mechanism.