Washer Nozzle Pre-Assembled Check Valve Jet Insert
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Solution Overview
Problem
Existing washer nozzles for motor vehicle screen wash systems are complex to construct and install due to the arrangement of the check valve directly behind the housing connection, which complicates the assembly process.
Innovation Solution
The check valve and jet insert are configured as a pre-assembled structural unit with a valve connector and an elastic membrane, simplifying installation by reducing the number of components and allowing for a press fit into the housing shaft, enabling easy assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the check valve is arranged directly behind the connection of the housing, then the back flow of washing fluid is prevented, but the construction and installation become very complex
Solution Approach 1:
The check valve is integrated directly into the jet insert, merging two previously separate components (check valve and jet insert) into a single unit. This integration eliminates the need for separate mounting of the check valve behind the housing connection, thereby reducing construction and installation complexity while maintaining the back flow prevention function.
Solution Approach 2:
The jet insert is designed to serve multiple functions: it shapes the washing fluid jet and simultaneously houses the check valve mechanism. This multi-functionality reduces the overall number of components needed in the system, simplifying both construction and installation while ensuring reliable back flow prevention.
2Reliability
If multiple separate components are used for the check valve and housing, then the check valve can be positioned to prevent back flow, but the installation process becomes complicated
Solution Approach 1:
The check valve and jet insert are merged into a single pre-assembled unit, transforming a multi-component installation process into a single-component installation. This significantly improves installation ease while maintaining the back flow prevention capability through the integrated check valve mechanism.
3Ease of operation
If the check valve is integrated into the jet insert as a pre-assembled unit, then installation is simplified, but the internal structure becomes more compact
Solution Approach 1:
The check valve mechanism is nested within the jet insert structure, with the check valve components housed inside the jet insert body. This nesting arrangement achieves a compact internal structure that simplifies installation as a single unit while containing all necessary check valve elements within the jet insert volume.
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
This design significantly simplifies the installation process of the washer nozzle, reduces complexity, and allows for efficient distribution of the washing fluid jet over a wide area with fewer components, enhancing ease of use and cost-effectiveness.
Implementation Method 1
one of the openings is closed by an elastic membrane
Implementation Method 2
The washer nozzle generates a jet of washing fluid depending on the shape of the jet insert
Data Source
AI summary
A washer nozzle for a screen wash system of a motor vehicle has a pre-assembled structural unit of a jet insert and a check valve. This structural unit is pressed into a shaft of a housing. This makes the washer nozzle particularly easy to install.