Vehicle Air-Treatment Control Using Coded Device Identification

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Solution Overview

Problem

Existing air-treatment systems for motor vehicles require customized control devices for different variants, leading to high development efforts due to varied requirements such as reliability and EMC, and lack a universal solution for reliable operation across different air conditioner configurations.

Innovation Solution

Incorporating electrical coding means that can be connected to and interrogated by a universal controller, allowing the system to identify and operate the air-treatment device variant based on specific parameters, ensuring safe and reliable operation by setting or switching off the operating voltage as needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If customized control devices are designed for different air-treatment device variants, then each variant can be operated with optimal parameters, but development effort and complexity increase significantly

Engineering Contradiction:
Improveadaptability to different air-treatment device variantsVSAvoidcontrol device complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The control device is designed as a universal multi-functional unit that can operate multiple variants of air-treatment devices (ionizers, ozone generators, electric heaters) through a single standardized interface. The controller reads identification data from coding means on each device variant and automatically adapts its operation parameters, eliminating the need for multiple customized control devices while maintaining optimal performance for each variant.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Device complexity

If a universal control device is used for all air-treatment device variants, then development effort is reduced, but the ability to accurately identify and operate each variant correctly is compromised

Engineering Contradiction:
Improvecontrol device complexityVSAvoididentification accuracy of device variant
Core Design Contradiction:
Device complexityVSMeasurement precision

Solution Approach 1:

An identification system serves as an intermediary between the universal control device and various air-treatment device variants. Coding means (such as resistors, capacitors, or electronic memory elements) are placed on each device variant to store identification data. The universal controller reads this data through standardized electrical connections and uses it to determine the specific variant type, enabling accurate parameter adaptation without requiring the controller to have complex built-in identification logic for each variant.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If electrical coding means are integrated into each air-treatment device variant, then accurate identification and safe operation are enabled, but device complexity and manufacturing cost increase

Engineering Contradiction:
Improveoperational reliability and safetyVSAvoidair-treatment device complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The identification system utilizes changes in electrical parameters (resistance, capacitance, or stored digital values) as coding means to encode variant information. These passive or simple active electrical components are integrated into each air-treatment device variant during manufacturing. The universal controller measures these electrical parameters through standardized connections and decodes the variant information, enabling reliable identification and safe operation while adding minimal complexity to the individual device variants.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS12134304B2Motor-vehicle air-treatment device
Publication Date: 2024.11.05 HEPA GMBH
  • US12134304B2 patent drawing

AI summary

An air-treatment system for a motor vehicle having an air conditioner, the system has an electrically powered air-treatment device in the air conditioner that treats air of an airflow generated by the air conditioner, a controller in the air conditioner that controls the air-treatment device in accordance with operating parameters of the air conditioner in which the air-treatment device is installed, and an electrical coder in the air-treatment device for identifying characteristics of the air-treatment device, that is electrically connectable with the controller on installation of the air-treatment device, and that is interogable after electrical connection to the controller has been established. This coder serves for detecting when the electrical coding means is electrically connected to the controller and for disconnecting electric power feed to the air-treatment device in the absence of an electrical connection between the coder and the controller.