Heated Sensor Cleaning Fluid Control to Prevent Icing Damage
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Solution Overview
Problem
Vehicle sensors, particularly those detecting external environments, face degradation due to obscuration by dust, dirt, snow, or ice, leading to reduced performance.
Innovation Solution
A system for maintaining heated fluid for sensor cleaning, comprising a heat exchanger, reservoir, and manifold, where a temperature sensor controls the flow of cleaning fluid to ensure it remains within specific temperature thresholds, preventing ice formation and maintaining sensor clarity without damaging hydrophobic coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cleaning fluid is heated to prevent ice formation, then sensor obscuration is prevented, but hydrophobic coatings may be damaged
Solution Approach 1:
The system dynamically adjusts the temperature parameter of the cleaning fluid based on environmental conditions. The controller monitors temperature and activates the heat exchanger only when necessary to prevent ice formation, maintaining fluid temperature within a safe range that prevents both icing and coating damage.
Solution Approach 2:
The system incorporates temperature sensing and control feedback mechanisms. The controller receives temperature information and adjusts heat exchanger operation accordingly, creating a closed-loop control system that responds to actual thermal conditions to prevent both ice formation and excessive heating that could damage coatings.
2Reliability
If cleaning fluid temperature is increased to melt ice, then sensor clarity is maintained, but energy consumption increases
Solution Approach 1:
The system uses periodic or intermittent heating rather than continuous heating. The controller activates the heat exchanger only when temperature thresholds indicate ice formation risk or actual icing conditions, allowing the system to conserve energy while maintaining sensor clarity during critical periods.
Solution Approach 2:
The system adjusts the temperature parameter dynamically based on environmental conditions rather than maintaining constant high temperature. This reduces energy consumption by heating only when necessary to prevent ice formation on sensor surfaces.
3Reliability
If cleaning fluid flows continuously through the system, then sensor obscuration is prevented, but fluid temperature drops below effective threshold
Solution Approach 1:
The system pre-heats the cleaning fluid before it reaches the sensors by routing it through the heat exchanger in advance. This preliminary heating action ensures the fluid arrives at the sensors at an effective temperature capable of preventing and removing ice accumulation.
Solution Approach 2:
The system maintains continuous flow of cleaning fluid through the heat exchanger and to the sensors during cold conditions. This continuous circulation ensures constant temperature maintenance and uninterrupted cleaning effectiveness, preventing ice formation on sensor surfaces.
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 effectively prevents sensor obscuration by maintaining the cleaning fluid at optimal temperatures, ensuring continuous sensor performance in harsh environments without compromising specialized coatings.
Implementation Method 1
a heat exchanger having an inlet port and an outlet port
Implementation Method 2
a temperature sensor within the reservoir, which is communicatively coupled to a controller
Data Source
AI summary
A system for maintaining heated fluid for sensor cleaning includes a reservoir, a heat exchanger, and a manifold fluidly coupled to the heat exchanger and to the reservoir. The manifold additionally includes a set of pumps positioned to distribute fluid to a set of sensors. A controller is programmed to actuate flow of cleaning fluid from the manifold to the heat exchanger responsive to an output signal from the temperature sensor.