Composite Valve Assembly With Single-Hole Integrated Check Valve

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Solution Overview

Problem

The existing valve assembly for fuel cell electric vehicles requires separate attachment holes for the electromagnetic valve and check valve, complicating the internal structure of the body.

Innovation Solution

A composite valve sub assembly is integrated into a single attachment hole, incorporating an electromagnetic valve and a check valve, with a tubular sleeve, electromagnetic valve body, solenoid actuator, plug, and check valve body, allowing for simplified internal structure and functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual valve sub assemblies (electromagnetic valve and check valve) are attached separately to the body, then each valve can function independently, but the body requires multiple attachment holes communicating with the gas flow path, complicating the internal structure

Engineering Contradiction:

Improveindependent valve functionVSAvoidinternal structure of body

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the electromagnetic valve and check valve into a single integrated valve sub assembly that attaches to the body through one attachment hole. The electromagnetic valve body and check valve are housed together in a common structure with shared flow paths, eliminating the need for separate attachment holes while maintaining independent valve functions through internal flow path design

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated valve sub assembly serves multiple functions through a single attachment point. The common flow path structure allows both the electromagnetic valve and check valve to operate independently while sharing the same attachment hole and partial flow path infrastructure, making the attachment hole universal for both valve types

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The integrated valve assembly simplifies the internal structure, facilitates attachment and replacement, and provides a manual pressure relief function, reducing complexity and enhancing safety.

Implementation Method 1

a solenoid actuator configured to move the electromagnetic valve body in the sleeve

Methodology Applied

Scientific EffectSolenoid: Solenoid

Implementation Method 2

an electromagnetic valve body housed in the sleeve

Methodology Applied

Scientific EffectElectromagnetic valve: Valve

Implementation Method 3

a check valve body disposed on an opposite side of the electromagnetic valve body from the plug

Methodology Applied

Scientific EffectCheck valve: Valve

Data Source

PatentUS12480588B2Valve assembly

Publication Date: 2025.11.25 JTEKT CORP

AI summary

A composite valve sub assembly includes a tubular sleeve inserted into a single attachment hole of a body; an electromagnetic valve body housed in the sleeve; a solenoid actuator configured to move the electromagnetic valve body in the sleeve; a plug fixed at an end portion of the sleeve and disposed between the sleeve and a bottom surface of the attachment hole; and a check valve body disposed on the opposite side of the electromagnetic valve body from the plug. The plug has an internal flow path including a first opening connected to a first flow path of the body and opened and closed by the electromagnetic valve body, and a second opening connected to a second flow path of the body and opened and closed by the check valve body.