Sensor Cleaning Nozzle Arrangement for Debris Removal
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Solution Overview
Problem
Existing sensor cleaning systems for vehicles are inefficient in removing debris and drying sensors effectively, often requiring complex valve systems and energy-intensive compressors, which can lead to debris ricochet and incomplete cleaning.
Innovation Solution
A compact sensor cleaning apparatus using two nozzles oriented at an acute angle, with one nozzle emitting a cleaning airstream and the other creating an air curtain to prevent debris contact, combined with a liquid source for washing and a controller to manage air pressure for efficient drying, eliminating the need for check valves and using a blower instead of a compressor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If existing sensor cleaning systems use compressors and valve systems, then they can provide high pressure for debris removal, but they become energy-intensive and complex
Solution Approach 1:
The patent removes the check valve component from the cleaning system, simplifying the device architecture. The air source directly controls airflow to the nozzle without requiring intermediate valve components, thereby reducing complexity while maintaining cleaning effectiveness
Solution Approach 2:
The patent replaces the mechanical compressor-based high-pressure system with an electronically controlled air source and nozzle system. This substitution eliminates complex mechanical valve systems while providing sufficient force for debris removal through optimized airflow control
2Force
If existing sensor cleaning systems use compressors, then they can generate high pressure for cleaning, but they consume excessive energy
Solution Approach 1:
The patent changes the operating parameters of the air source system, using lower pressure operation with optimized nozzle design to achieve effective cleaning. This approach reduces energy consumption while maintaining sufficient cleaning force through improved airflow distribution and nozzle geometry
3Ease of manufacture
If cleaning systems use simple nozzle configurations, then they are easier to manufacture, but they cannot effectively prevent debris ricochet
Solution Approach 1:
The patent employs asymmetric nozzle positioning and airflow direction control to prevent debris ricochet. The nozzle is positioned and angled specifically to direct airflow in a pattern that pushes debris away from the sensor lens without causing it to bounce back, achieving reliable cleaning while maintaining simple manufacturing
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 system provides effective debris removal and drying of sensor lenses with high shear force, preventing debris ricochet and offering a simple, energy-efficient design that maintains sensor clarity and functionality.
Implementation Method 1
The nozzles are oriented to emit respective airstreams intersecting the axis and directed apart at an acute angle... providing effective debris removal and drying of sensor lenses with high shear force
Implementation Method 2
the other creating an air curtain to prevent debris contact
Implementation Method 3
combined with a liquid source for washing and a controller to manage air pressure for efficient drying
Data Source
AI summary
An apparatus includes a sensor lens defining an axis, a first nozzle and a second nozzle positioned a same perpendicular direction from the axis and spaced along a direction parallel to the axis, and an air source fluidly connected to the nozzles. The nozzles are oriented to emit respective airstreams intersecting the axis and directed apart at an acute angle.