Motor Vehicle Light Lens Heater Routing
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Solution Overview
Problem
Motor vehicle light assemblies face issues with fogging, frost-buildup, and ice-buildup on light-transmissive lenses, which are not effectively addressed by existing technologies while maintaining economic manufacturing and assembly.
Innovation Solution
A motor vehicle light assembly with a lens heater assembly featuring a heater member routed to optimize radiant heat flow onto the light-transmissive lens, including a tubular wall with a cavity for heat transfer, radiator fins for enhanced heat distribution, and a temperature-controlled valve system to regulate heat flow and prevent fogging, frosting, and icing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heater member is added to prevent fogging, frosting, and icing on the light-transmissive lens, then the resistance to fogging, frosting, and icing is improved, but the device complexity increases
Solution Approach 1:
The heater member utilizes waste heat from the light source itself to prevent fogging, frosting, and icing on the lens. The system is self-regulating, using the inherent thermal energy from the operating light source rather than requiring an external heating system, thereby reducing overall device complexity while maintaining reliability
Solution Approach 2:
A valve is introduced as an intermediary component to control and regulate the flow of heat from the light source to the lens. This simple mechanical intermediary allows precise temperature management without requiring complex electronic control systems, resolving the contradiction between reliability and device complexity
2Reliability
If the heater member is precisely routed to optimize radiant heat flow onto the lens, then the effectiveness in preventing fogging, frosting, and icing is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The system optimizes heat delivery by adjusting the physical state and flow parameters of the heating medium through the valve, rather than requiring precise mechanical routing of solid heater elements. This allows effective heat distribution with relaxed manufacturing tolerances
Solution Approach 2:
The heater member routing is designed to be flexible and adaptable, allowing the system to dynamically adjust heat flow paths based on operational conditions rather than requiring fixed, precisely manufactured rigid connections
3Adaptability or versatility
If the valve is made selectively moveable to control heat flow, then the adaptability to environmental conditions is improved, but the device complexity increases
Solution Approach 1:
The valve is designed to automatically respond to environmental conditions through a feedback mechanism, such as thermal expansion or temperature-sensitive actuation. This eliminates the need for complex electronic sensors and control circuits, achieving adaptability while minimizing device complexity
Solution Approach 2:
The valve system is self-regulating, using the thermal energy and environmental conditions themselves to control heat flow. The system serves itself by automatically adjusting to temperature changes without external control, maintaining adaptability with minimal added complexity
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 solution effectively resists and prevents fogging, frosting, and icing of the light-transmissive lens, ensuring clear visibility under various environmental conditions while maintaining the assembly's economic and reliable operation.
Implementation Method 1
The heater member is configured to radiate heat emitted from the light source, with the heater member being precisely routed to direct the radiated heat optimally onto the light-transmissive lens
Implementation Method 2
The heater member can be formed having a tubular wall bounding a cavity to facilitate the flow of radiant heat through the cavity and toward the light-transmissive lens
Implementation Method 3
a valve can be operably coupled to the heater member, with the valve being selectively moveable between an open state, whereat heat is free to flow into and through the cavity of the heater member, and a closed state, whereat heat is inhibited from flowing into the cavity of the heater member
Data Source
AI summary
A motor vehicle light assembly includes a housing; a light source disposed in the housing, and a light-transmissive lens operably attached to the housing. A heater member is disposed between the housing and the light-transmissive lens. The heater member is configured to radiate heat emitted from the light source, with the heater member being routed to direct the radiated heat onto the light-transmissive lens to regulate the temperature of the light-transmissive lens to inhibit fogging, frosting and icing of the light-transmissive lens.