Urea Water Inlet Opening Device with Segmented Ventilation Cap

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Solution Overview

Problem

Conventional urea caps for vehicle urea water systems are cumbersome to open and close, leading to user inconvenience and potential corrosion of threaded portions when urea water is injected, making reassembly difficult.

Innovation Solution

An opening device for the urea water inlet featuring a first body with a ventilation gap and a membrane, a second body with a torsion spring and elastic members, and an opener that allows one-touch operation to open the inlet without removing the cap, ensuring air permeability and preventing foreign substance entry.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a conventional threaded urea cap is used to close the inlet, then the inlet can be sealed, but it takes a long time to open or close the inlet and requires removing the cap completely

Engineering Contradiction:

Improveease of opening inletVSAvoidtime to open or close inlet

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The cap assembly is divided into a first body that threads onto the inlet and a second body with a cover that can be independently opened. The cover is segmented from the main cap body, allowing it to be opened without removing the entire cap assembly from the inlet.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second body is mounted on the upper end portion of the first body with a ventilation gap between them. The cover is mounted on the upper end portion of the second body, creating a nested structure where the cover can be opened independently while the first body remains threaded on the inlet.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If the urea cap is removed from the inlet to inject urea water, then injection is possible, but the threaded portion becomes exposed to corrosive urea water and atmosphere

Engineering Contradiction:

Improveease of urea water injectionVSAvoidcorrosion of threaded portion

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first body acts as an intermediary that remains threaded on the inlet during injection, protecting the threaded portion from direct exposure to urea water and atmosphere. The ventilation gap and membrane provide controlled access while maintaining protection.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If a membrane is added to cover the ventilation gap, then foreign substance entry is prevented, but device complexity increases

Engineering Contradiction:

Improveprotection from foreign substancesVSAvoidcomplexity of cap assembly

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A membrane is used to cover the ventilation gap between the first body and second body. The membrane is a thin film that provides protection from foreign substances while maintaining air permeability and minimizing structural complexity.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The membrane is configured to pass only air therethrough, functioning as a porous or breathable barrier that allows ventilation while preventing foreign substance entry into the urea tank.

Inventive Principle:

Principle #31Porous materials

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

Enables easy and convenient injection of urea water into the urea tank while maintaining cap fastening, reducing corrosion risks and simplifying the reassembly process.

Implementation Method 1

a membrane mounted between the first body and the second body to pass only air therethrough while covering the ventilation gap

Methodology Applied

Scientific EffectPermeation: Permeation

Implementation Method 2

the sliding hole may be provided with an elastic member elastically supporting a first end portion of the button portion

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11358856B2Opening device for urea water inlet of vehicle

Publication Date: 2022.06.14 HYUNDAI MOTOR CO LTD

AI summary

An opening device for a urea water inlet may include a first body configured to be provided on an external side of an inlet of a urea filler neck; a second body disposed at an upper end portion of the first body with a ventilation gap between the first body and the second body, and provided with an internal space to be disposed above the inlet; a cover disposed at an upper end portion of the second body, and configured to receive a force to open the internal space of the second body; an opener provided in the second body, and configured to hold the cover at the upper portion of the second body when the cover is configured to close the internal space, and to release holding of the cover when being pressed toward an interior of the second body; and a membrane disposed between the first body and the second body to pass only air therethrough while covering the ventilation gap.