Solenoid Valve Buffer Member for Brake Noise Reduction

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Solution Overview

Problem

Conventional solenoid valves in brake systems experience noise and vibration due to collisions between the armature and the valve dome during operation, which are not effectively mitigated by existing designs.

Innovation Solution

Incorporation of a buffer member with a support part and leg parts that are elastically deformable, providing primary and secondary buffering to absorb the impact between the armature and the valve dome, thereby reducing noise and vibration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the armature is designed for rapid response by applying magnetic coil, then the response speed is improved, but the armature collides with the valve dome causing noise and vibration

Engineering Contradiction:

Improveresponse speedVSAvoidnoise and vibration

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

A buffer member is provided between the armature and the valve dome to cushion the impact before collision occurs. The buffer member absorbs the shock energy when the armature rapidly moves forward, preventing direct collision with the valve dome while maintaining the rapid response capability achieved through the magnetic coil application.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The buffer member acts as an intermediary element positioned between the armature and the valve dome. It mediates the interaction by absorbing impact energy during rapid armature movement, thereby preventing direct harmful contact while allowing the magnetic coil to maintain its rapid response function.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If the groove is formed on the armature for rapid response, then the oil hydraulic pressure decreases enabling rapid plunger movement, but the armature collides with the valve dome during returning

Engineering Contradiction:

Improveoperational efficiencyVSAvoidcollision impact

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The buffer member is pre-installed between the armature and valve dome to provide cushioning before the collision occurs during the returning motion. This allows the groove design to maintain its productivity benefit of rapid plunger movement while the buffer member prevents the harmful collision impact during the return stroke.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 buffer member effectively decreases noise and vibration caused by armature-valve dome collisions, enhancing the operational stability and durability of the solenoid valve.

Implementation Method 1

a buffer member configured to buffer an impact between the armature and the valve dome and provided between the armature and the valve dome

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS9714018B2Solenoid valve for brake system

Publication Date: 2017.07.25 HL MANDO CORP

AI summary

A solenoid valve for a brake system capable of reducing noise and vibration caused during operation of the solenoid valve. The solenoid valve includes a valve core, a valve dome, an armature, and a plunger. An upper surface of the armature is recessed to form an insertion recess, a buffer member buffers an impact between the armature and the valve dome, the buffer member includes a support part between the upper surface of the armature and the valve dome and buffers and supports the armature, and an insertion part connects to the support part and inserted into the insertion recess.