Dual-Port Sensor Washing Nozzle for Wide-Area Liquid Coverage
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Solution Overview
Problem
Existing liquid jetting nozzles for vehicle sensors, such as back-eye cameras, face challenges in effectively washing large sensor areas without increasing nozzle size or complexity, leading to higher costs and installation difficulties.
Innovation Solution
A liquid jetting nozzle design featuring a nozzle tip with two ejection ports and channels that collide, allowing for a wide area wash without enlarging the nozzle, with the first ejection port jetting liquid towards the sensor and the second towards the opposite side, creating a dispersed flow that covers a larger area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the sensor size is increased to cover a larger area, then the washing coverage is improved, but the nozzle size and complexity must be increased
Solution Approach 1:
The nozzle is divided into multiple ejection ports (first ejection port and second ejection port) with separate downstream channels. Each ejection port directs liquid at a specific angle to cover different regions of the sensor, allowing the nozzle to maintain a compact size while achieving wide-area coverage through segmented ejection paths
Solution Approach 2:
The first and second downstream channels are configured with asymmetric angles relative to the upstream channel. The first downstream channel forms a first angle with the upstream channel, while the second downstream channel forms a second angle, creating asymmetric ejection patterns that together cover a broader sensor area without requiring a larger nozzle body
2Area of stationary object
If multiple nozzles are provided to cover a large sensor area, then the washing coverage is improved, but the device complexity and installation difficulty increase
Solution Approach 1:
Multiple ejection functions are merged into a single integrated nozzle body. The first and second ejection ports, along with their respective downstream channels, are combined within one nozzle structure, eliminating the need for separate nozzles and simplifying installation while maintaining the ability to cover a large sensor area through multi-directional ejection
3Area of stationary object
If the nozzle size is increased to jet liquid at a large area, then the washing coverage is improved, but the installation space requirements increase
Solution Approach 1:
The nozzle utilizes angular dimensionality by configuring downstream channels at different angles rather than expanding in linear size. The first and second downstream channels diverge at specific angles from the upstream channel, creating a fan-shaped ejection pattern that expands the coverage area in the angular dimension while keeping the nozzle's physical volume compact
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 enables effective washing of large sensor areas with reduced complexity and cost, maintaining ease of installation by dispersing the liquid in a fan shape, effectively covering the sensor's rectangular shape with a wider left-to-right spread.
Implementation Method 1
an angle formed between the first downstream side channel and the second downstream side channel is configured such that the liquid jetted out from the first ejection port and the liquid jetted out from the second ejection port collide
Data Source
AI summary
A liquid jetting nozzle-includes a tip body and a tip supported at the tip body. The tip body includes an introduction port which a liquid is introduced. A first and a second ejection port are formed in the tip and each jet out the liquid introduced through the introduction port. A first and a second conduit are formed in the tip. The first conduit structures a downstream side region of a first channel through which the liquid flows from the introduction port toward the side at which the first ejection port is formed. The second conduit structures a downstream side region of a second channel through which the liquid flows from the introduction port toward the side at which the second ejection port is formed. An angle formed between the first and second conduit is specified that the liquid jetting out from the first and second ejection port collide.